To reach the Case Quarries or Prospects go to the intersection of Rt 17 and Rt 17A in Portland.  Head east to Old Marlborough Road, then north (left) on this road until you reach Thompson Hill Road on the left. Follow to Cotton Hill Road on the right, follow Cotton Hill to power lines and park.  Walk up two hills along the power lines until you run into a bunch of white quartz.  Quarries are in the woods to the left.  Note that this is State property, collecting is by STATE PERMIT ONLY (rules) (see News page for permitted club collecting dates!).

The principal mineral of interest here is beryl, which is mostly a blue green to aqua, some are yellow.  Not much is available in the quarries themselves, but there are numerous dumps at the three old quarries to sort through.  Schorl, spessartine, columbite, and rare bismuth minerals are also available. A single find of monazite and of the rare mineral petscheckite UFe(Nb,Ta)2O8 (only the third discovery world-wide) were recently reported.

Much has been written about these little quarries.  Excerpts from the literature are printed below:

Cameron et. al. in PEGMATITE INVESTIGATIONS 1942-45 NEW ENGLAND (USGS Prof. Paper 255, 1954) provides a detailed description and history of the Case Prospects:

The Case prospects lie in the town of Portland, 4.5 miles N. 39° E. of the center of Portland village. To reach them from Portland travel eastward on State Highway 17A to its intersection with State Highway 17. Proceed 0.3 mile eastward on a paved town road, then turn left and travel northward about 1.3 miles, bearing right at two road forks. At this point turn left for 0.7 mile to an intersection. Proceed eastward 0.1 mile then turn northeastward on a poorly marked dirt road that leads into woodland just east of a farmhouse. Follow this road about 2,500 feet to the prospects.

The property is owned by Myron N. Case, Rose Hill, Portland. The Worth Spar Co., Inc., of Cobalt quarried three pegmatites on the property for feldspar from 1933 to 1935. In the summer of 1939 Frank Bajorek of Portland mined the westernmost pegmatite (no. 1 quarry, pl. 43) for feldspar. The Worth Spar Co. prospected the no. 2 pegmatite for sheet mica in August and October 1942. The workings are opencuts that range from 60 to 110 feet in length, 7 to 45 feet in width and 10 to 25 feet in maximum depth. All are flooded.

The pegmatites were mapped by E. N. Cameron and V. E. Shainin in March 1943 and were studied period­ically until December 1943 (fig. 130 and pl. 43). The U. S. Bureau of Mines and Geological Survey cooperated in surface and subsurface exploration of the pegmatites from May to November 1943. E. E. Maillot was in charge of the project for the Bureau of Mines and V. E. Shainin studied the subsurface geology for the Geo­logical Survey. The no. 2 and 3 quarries were pumped, and 14 holes totaling 1,673.5 feet were made by diamond-drill.

The three pegmatites on the Case property lie within 500 feet of one another. They strike north to northeast and differ in direction and magnitude of dip. The pegmatites cut granite-gneiss (Monson gneiss), the foliation of which strikes generally northward and dips 20°-30° W.

The no. 1 pegmatite, westernmost of the group, is 5 to 7.5 feet thick, strikes N. 70 E. and dips 35°-45° SE. It has been quarried for about 100 feet along strike and to a maximum depth of 17 feet. It may have terminated upward a short distance above the rim of the workings. The pegmatite has a border zone 1/2 to 1 inch thick consisting of fine-grained granular quartz, plagioclase, perthite, and beryl. The rest of the pegmatite (designated perthite-quartz zone on pl. 43) consists of medium- to extremely coarse-grained perth­ite and quartz, with subordinate plagioclase and muscovite, and accessory beryl, garnet, and columbite-tantalite. Muscovite forms small, colorless to gray-green, heavily stained books, irregularly distributed. In general, the texture of this material is progressively coarser toward the center of the pegmatite. There is no clearly defined quartz core exposed, but in places in the central part of the pegmatite there are irregular bodies of quartz, against which the perthite crystals are euhedral. Offshoots of the quartz bodies extend outward across the surrounding pegmatite along fractures. In addition, veins of quartz occur along the contacts with wall rock. Debris left in the north end of the opencut suggests the presence of a small quartz core flanked by a perthite-quartz zone similar to that of the no. 2 pegmatite described below.

High-grade perthite constitutes at least 50 percent of the perthite-quartz zone visible. Beryl occurs chiefly in the border zone and the outermost 12 to 18 inches of the perthite-quartz zone, and is most abundant in the footwall part of the perthite-quartz zone. The crystals range from 1/8 inch to 4 inches in length and from 1/16 inch to 3 inches in diameter. Measurements of all crystals in the cross-section of the pegmatite in the northern face of the quarry indicate a beryl content of 0.15 per­cent. However, the exposures available for measure­ment are few, and the accuracy of the figure obtained for grade is doubtful. Waste rock on the dump seemed to show considerably more beryl in material derived from the perthite-quartz zone than is indicated by the crystal measurements, Measurements of beryl crystals in the footwall part of the border zone indicated 0.41 percent beryl.

The no. 2 pegmatite (mined in the no. 2 quarry) is a tabular lens that strikes N. 17° E. and dips 15° NW. At the surface, it has a strike length of 60 feet. It probably terminates beneath overburden less than 40 feet northward from the quarry. The south edge of the lens plunges southward from the open cut at a moderate angle. One hundred and eighty feet down dip from its surface outcrop, the inferred strike length of the pegmatite is 155 feet. The thickness of the body ranges from 10 feet at the surface to about 16 feet at a point 180 feet down dip.

The pegmatite is distinctly zoned. The border zone, 2 to 4 inches thick, is composed of fine-grained quartz, perthite, and plagioclase, with accessory muscovite, garnet, beryl, and tourmaline. The wall zone, 2 to 6 inches thick, consists of medium-grained perthite, plagioclase, and quartz, with accessory muscovite, beryl, and garnet. The intermediate zone, 1 to 4 feet thick, is similar to the wall zone but is composed chiefly of quartz and extremely coarse perthite. The core averages 5 feet in thickness and is composed of coarsely crystalline milky quartz, accessory perthite in scattered large, euhedral crystals, and rare beryl. Perthite crystals in the perthite-quartz intermediate zone are euhedral against quartz of the core. The zonal struc­ture was clearly recognizable in 3 of the 4 drill holes that intersected the pegmatite 1, 2, and 5. Cores from holes 5 and 7 were inadequate for the construction of logs.

Beryl occurs in the border and wall zones in scattered crystals ¼ to ¾ inches in diameter and as much as 3 inches long. Some crystals in the perthite-quartz zone are 9 inches in diameter and 10 inches long. Measure­ments on exposures in the quarry (230 square feet) suggest that the average beryl content of the pegmatite is 0.34 percent. On the basis of this figure, and diamond drilling, 53 tons of beryl are indicated and 27 tons are inferred to lie beneath the surface to a depth of 180 feet clown the dip.

The percentage of high-grade feldspar in the no. 2 pegmatite is less than that in the no. 1 pegmatite but perthite in the perthite-quartz zone is mostly pure and separable by hand sorting.

The no. 3 pegmatite, northernmost of the group, is a tabular lens that strikes N. 25° to 48° E. and dips 63° to 71° NW. The crest of the lens plunges gently northward and southward from the quarry. The strike length of the pegmatite ranges from 70 feet at the surface to at least 350 feet at a level 120 feet down dip from the workings. Along strike the dike is thickest in the center (7 feet) and thins to less than 2 feet both north and south of the workings. The pegmatite was probably not intersected by drill hole 14. It is believed to terminate above the hole but below eleva­tion 240 feet (pl. 43, sec. A-A’).

The dike exhibits a fairly distinct zonal structure in the no. 3 quarry. The border zone, ½ to 1 inch thick, is composed of quartz, perthite, and plagioclase, with accessory black tourmaline, muscovite, beryl, and garnet. The wall zone, 1 to 2 feet thick, is irregular and in places absent. It is composed of quartz and plagioclase with various amounts of coarse-grained perthite, subordinate muscovite, accessory beryl, tour­maline, and columbite-tantalite. The pegmatite inside the wall zone consists of coarse-grained perthite and quartz with accessory beryl and plagioclase. There is no true quartz core, but irregular bodies of quartz are present in the quartz-perthite zone. Neighboring perthite crystals are euhedral against the quartz bodies. The zonal structure of the pegmatite was recognized in the diamond-drill hole cores, although it was less clearly defined than at the surface.

Beryl occurs in the border zone in crystals less than ¼ inch in diameter and 1 inch long, and in the wall zone crystals as much as 2 inches in diameter and 5 inches long. The footwall part of the wall zone appears to contain more beryl than the hanging-wall part, and the beryl crystals are larger. Counts made on the northern and southern faces of the quarry (250 square feet of pegmatite), before and after exploratory blast­ing, indicate an average beryl content of 0.22 percent. From this figure and data of the Bureau of Mines, 25 tons of beryl is indicated and 6 tons inferred to lie beneath the surface to a depth of 120 feet down the dip.

  The Case nos. 2 and 3 pegmatites are inferred to contain slightly more than 100 tons of beryl, mostly in small crystals. Recovery by hand-cobbing would unquestionably be difficult. Each of the three peg­matites contains limited tonnages of high-grade, hand separable perthite, and the no. 2 pegmatite probably contains at least 6,000 tons of coarse milky quartz that appears to be of high purity and could be separated readily by hand.

Dick Schooner wrote in his 1958 tome THE MINERALOGY OF THE PORTLAND-EAST HAMPTON-MIDDLETOWN-HADDAM AREA IN CONNECTICUT:

"Bismite, usually of a yellow color, is rather common, as coatings on feldspar and quartz, at two of the Case Quarries in Portland. It is an alteration product of bismutite, with which it is frequently associated."

"The author discovered a very interesting occurrence [of bismuthinite] at the Case Quarry No. 1 in Portland, in 1952. One specimen shows a platy mass, an inch across, in iron-stained pegmatite."

"The author has collected attractive green specimens [of bismutite], showing other bismuth compounds and goethite, at the Case Quarries in Portland. The identity of this material was confirmed by an x-ray study, made at Harvard University by Mary E. Mrose."

"The author recently collected a stubby two inch [columbite] crystal at the Case Quarry No. 1 in Portland."

"[Fluorapatite] from the Case Quarries...is white and easily overlooked."

"Goethite, of a lustrous brown color, associated with green bismutite, is rather common at the Case Quarry No. 1 in Portland, but the specimens are usually rather small."

"Clear to milky quartz, free of visible impurities, is present in what should be a commercial amount at the Case Quarry No. 2 in Portland."

In his 1961 work on the whole state (THE MINERALOGY OF CONNECTICUT), Dick Schooner also similarly reports:

"The Case Quarries in Portland yield a white variety [of apatite] with a rather intense [fluorescent] reaction."

"The Case Quarries, three in number, have been a source of rather good [beryl] specimens, though well formed crystals are rarely obtained there; the colors are green, blue, and occasionally yellow. Bismuth minerals are usually associated."

"Yellowish [bismite], replacing green bismutite, is rather common at the Case Quarries in Portland,"

"The author has found a few excellent specimens of platy bismuthinite, partly altered to bismutite, at the Case Quarries in Portland; goethite was intimately associated, in fairly ordinary beryl-containing pegmatite."

"The author has often found rich green specimens of [bismutite] at the Case Quarries in Portland, where he discovered the occurrence about ten years ago. It was verified by x-ray tests."

"A few good [columbite] crystals, as much as two in­ches across, have been collected at the Case Quarries"

"the author has collected very good examples [of torbernite] at the Case Quarries; torbernite greatly predominates over autunite there.

In 1960, Robert W. Jones, Jr. reported in LUMINESCENT MINERALS OF CONNECTICUT, the following luminescent minerals at CASE QUARRY: Albite, Autunite, Hyalite, Manganapatite, Quartz, Torbernite, Uranophane.

In 1972, Kathleen Ryerson (ROCK HOUND'S GUIDE TO CONNECTICUT) reported that "Predominantly blue beryl is found here.  There are chips and pieces as well as some loose crystals in the dumps.  Crystals are also to be found in the pegmatite rocks and boulders in the dump areas.  Other reported minerals include albite, autunite, hyalite, quartz, and uranophane."

Bud Webster's 1978 MINERAL COLLECTOR’S FIELD GUIDE CONNECTICUT gives the following description:

"This pegmatite has two areas. The first dump is best known for specimens of columbite, uraninite, and autunite. Further in the woods is a cut and dumps producing abundant small beryls, some rather gemmy. Specimens from this locality can be very nice, as many are imbedded in feldspar, from which they may be trimmed with far less difficulty than from quartz."

Bud Webster and Bill Shelton's MINERAL COLLECTOR’S FIELD GUIDE - THE NORTHEAST had this to say:

The Case quarry area actually is rather extensive. There are three dumps and three small open cuts. All produce the species beryl, muscovite, feld­spar, quartz, garnet, columbite, etc.. Cut no. 1 [Cameron's No. 2 - ed.] has produced some extremely fine, one inch garnet crystals from the pegmatite near the contact with the surrounding Glastonbury granite-gneiss. The floor seems particularly rich in beryl crystals as well as garnet. It requires heavy equipment and lots of work to remove this material. HIGHLY RECOMMENDED.

Cut no. 2 [Cameron's No. 1 - ed.] has been found particularly well-endowed with columbite, golden beryl, uranium species, and the bismuth suite; including bismuthinite, bismutite, and bismite. The careful collection of these will provide some rather rare species; microscopic material is also available.

Columbites range from very beautiful, elongated micro-crystals to large, crude crystals up to 1 1/2 inches long. These are among the most spectacular finds. Elongate, iridescent crystals occur in groups on pure white feld­spar, usually best viewed with a microscope.

The dump at no. 3 has a lot of beryl which ranges from pale green, pale blue, white, deep green, to deep blue. Crystals vary from sharp prisms to so-called steeple crystals that taper from top to bottom in a V-shaped manner noted at many pegmatites. A sturdy shovel, perhaps a screen, a crack hammer, chisel, and knapsack will suffice for this area.

The pegmatites are sills or dikes of Mississippian age. Surrounding rocks are mainly gneiss. Minor amounts of hornblende, epidote, and tourmaline occur along the contact zone and nearby. Biotite and possibly spessartite occur along with the other species mentioned previously.

Cutters may find the quartz worthy of cabbing. Beryl from here is not generally worth faceting since only extremely small areas are found which have no fractures or imperfections.

SELECTED PEGMATITE QUARRIES OF THE CENTRAL CONNECTICUT REGION by Anthony J. Albini:

This 1979 master's thesis surveyed several pegmatites for their mineralogy.  At Case Quarry he found the following 19 species (strangely, albite is not noted):

Almandine, Autunite, Beryl, Bismite, Bismuthinite, Bismutite, Columbite, Gummite, Hyalite Opal, Limonite, Microcline, Muscovite, Pyrolusite, Quartz, Samarskite, Schorl, Torbernite, Uraninite, Zircon

"Autunite was identified at Case Quarry. The autunite specimens have a bright yellow color and are found as thin flakes...associated with green torbernite, smoky quartz, muscovite mica, columbite and microcline feldspar."

"Golden, green and blue beryl were found at Case Quarry. Much of the beryl here has a stubby habit; the length of the crystals are usually not much larger than the width. Also, the “steeple” form of beryl which has a tapering length occurs here. Another peculiarity of the Case Quarry beryl is that some of the crystals have a microcline feldspar core. The golden beryl is associated with smoky quartz, microcline feldspar, bismutite, bismite, and columbite. The aquamarine and green beryl specimens occur with white microcline feldspar and quartz. The blue beryl is found with quartz and microcline feldspar and sometimes without any matrix."

"The bismite occurs here as tiny, light yellow or green massive fragments that are scaly or earthy. The bismite has a grayish to yellow streak and its associate minerals are bismutite, bismuthinite, microcline feldspar, and smoky quartz. Bismite can be distinguished from bismutite which is yellow or green by using hydrochloric acid (HCl) as a testing reagent (Sinkankas, 1972). Bismutite reacts with HCl and produces carbon dioxide gas which is noted as an effervescence on the mineral. Bismite does not react with HCl in this manner. Also, to find out if an unknown specimen is a bismuth mineral, the collector can mix the powdered mineral with anhydrous sodium carbonate and then place the mineral on a charcoal block and fuse the mixture. If the mineral contains bismuth, a metallic pinkish-White globule (bismuth) is formed that is brittle when hammered".

"When the specimens of bismite and bismutite were first collected, the writer thought that these green and yellow minerals might be autunite and torbernite. A negative test for radioactivity and the HCl test for a carbonate mineral helped the writer conclude that these were bismuth minerals."

"Bismuthinite occurs at Case Quarry...The Case Quarry specimens are massive. They are lead-gray with a metallic luster and a lead-gray streak... [and] are sectile. Slivers of the mineral can be cut from the specimen with a steel knife blade. The bismuthinite at Case Quarry is associated with green bismutite, yellow bismite, microcline feldspar, smoky quartz, and beryl."

"...bismutite at this site has a green color and is found in thin scaly masses with a vitreous or pearly luster...The bismutite mineral associates are yellow bismite, bismuthinite, smoky quartz, microcline feldspar, and beryl (usually golden beryl)."

"Case Quarry [columbite] specimens are thick, rectangular crystals or very small, prismatic crystals...[and] occur with smoky quartz, golden beryl, microcline feldspar, and muscovite mica."

"The Case Quarry gummite is orange-red and has a greasy luster. It is radioactive. One specimen of gummite has the mineral associates smoky quartz, uraninite, autunite, torbernite, microcline feldspar, and golden beryl. The other specimen of gummite is associated with smoky quartz, muscovite mica, microcline feldspar, columbite, autunite and torbernite."

"[Hyalite specimens] show excellent yellow-green fluorescence in ultraviolet light...The Case Quarry specimen has hyalite coating blue beryl. The hyalite cannot be differentiated from the beryl without the ultraviolet lamp."

"Case Quarry limonite is found as brown stains coating smoky quartz."

"Case Quarry microcline is pink or cream in color. The pink microcline is found in the second dump and the cream-colored microcline is found in the first cut where many of the heavy minerals (such as uraninite, bismite, columbite) occur."

"Case Quarry muscovite is light brown or green. Very few distinct crystals are found. Most of the muscovite consists of brown crystal fragments associated with microcline feldspar and quartz."

"[Pyrolusite] specimens also have a black streak and metallic luster. Associate minerals include beryl, microcline feldspar, muscovite mica, and quartz...is steel-gray or black and is massive. The pyrolusite stains form a dendritic pattern on the other minerals."

"The quartz at Case Quarry is milky quartz or smoky quartz. The milky quartz is sometimes translucent and beautiful and has been cut, polished, and used in jewelry. Many massive pieces of milky quartz with no matrix are easily found. The smoky quartz occurs with no matrix or with microcline feldspar, uraninite, columbite, golden beryl, and muscovite mica. Both the milky and smoky quartz at this locality were found only as massive pieces."

"The Case Quarry [samarskite] specimens are black. They are found as shattered masses or imbedded crystals in microcline feldspar. The samarskite is radioactive, has a conchoidal fracture and looks like black obsidian. In addition to the microcline, the mineral associates are bismite, bismutite, and smoky quartz. One of the specimens was examined by Ronald E. Januzzi, a mineralogist from Brewster, New York. Mr. Januzzi concluded that the specimen was either samarskite or yttrotantalite. The Case Quarry specimens have a reddish-brown streak. Dana (1932) states that yttrotantalite has a gray or colorless streak. Therefore, the writer believes that these Case Quarry specimens are samarskite."

"Schorl is not easily found at Case Quarry. The writer found one specimen with black prismatic crystals associated with microcline feldspar, muscovite mica, and quartz. This specimen is partly pegmatite and partly metamorphic rock. The contact between the pegmatite and the ad­jacent metamorphic rock (Glastonbury granite gneiss) is clearly seen."

"The torbernite found at Case Quarry is a bright yellow-green and occurs a tiny flakes. The torbernite has a vitreous luster. This mineral is associated with yellow autunite, and microcline feldspar. When the specimen was tested with the ultraviolet mineral lamp, the yellow mineral (autunite) fluoresced bright yellow-green and the green mineral did not fluoresce (torbernite). Therefore, the green mineral is torbernite."

"The Case Quarry uraninite is velvet-black with a dull luster. It is highly radioactive. The broken, partial crystal is found in microcline feldspar and there is a rim of gummite surrounding the uraninite. The microcline adjacent to the uraninite is stained red. The other mineral associates are autunite, torbernite, muscovite mica, golden beryl crystals, and very dark smoky quartz.

 "The zircon at Case Quarry consists of very small, brown, prismatic crystals that are found in microcline feldspar. One broken crystal has a conchoidal fracture. The specimens have a colorless streak and an adamantine luster. Other minerals associat­ed with the zircon are smoky quartz, and almandine garnet."

Fred E. Davis reports the following information in the Triassic Valley Bulletin, June-July 2000:

"The Case Prospects have three main quarry sites, often referred to as Case #1, #2 and #3. Number one is the closest to the path along the power lines. As you face it, number two is further back to the left, and number three is further back to the right."  [Editor's Note: The identification of Case #1 and #2 is reverse by Davis from that indicated by Cameron et al 1954, (see above)]

"In Case #1 [Cameron's No. 2 - ed.], quartz-perthite pegmatite is divided into two zones, a wall zone relatively rich in beryl, and an intermediate zone relatively lean in beryl. A layer of massive quartz separates the wall rock from the remainder of the pegmatite along one side and partly around its north end. This quartz layer has the shape of an incomplete zone, but actually is a true fracture filling, as indicated by the angular fragments of pegmatite border zone that it contains. At its south end the vein turns and cuts across the wall rock. It must have been formed along a fracture that nearly coincided with the pegmatite-wall rock contact. The contact zone with the granite-gneiss has produced some extremely fine, one-inch garnet crystals."

"The core of Case #2 [Cameron's No. 1 - ed.] closely reflects the shape of much of the pegmatite body, while the border zone of is very thin...Case #2 has been found particularly well-endowed with columbite, golden beryl, uranium species, and the bismuth suite including bismuthinite, bismutite, and bismite. Microscopic material is also available. I have found uranophane, phosphuranylite, autunite, and gummite here."

"Case #3 has a lot of beryl which ranges from pale green, pale blue, white, deep green, to deep blue. Crystals vary from sharp prisms to so-called steeple crystals that taper from the bottom in a V-shaped manner."

 REPORTED MINERALS

Albite, almandite, autunite, beryl*, biotite, bismite, bismuthinite, bismutite, chalcopyrite, columbite, cyrtolite, epidote, fluorapatite, garnet, goethite, gummite, hornblende, hyalite, limonite, microcline, muscovite, opal, orthoclase, phosphuranylite, pyrite, pyrolusite, quartz, spessartine, tantalite, torbernite, tourmaline, uraninite, uranophane

*  beryl: golden, blue, deep blue, pate blue, pale green, deep green, white

Now that you've read all about the bismuth minerals at Case Quarries, you'll be happy to find out it's maybe overly simple!  Here's the results from some recent research presented at the Rochester Mineral Symposium and published in Rocks & Minerals, 71/3, 5-6/1996, p. 197....

An Occurrence of Bismutoferrite in Portland, Connecticut, R. C. Huff, R. G. Huff, J. Vajdak

"The Case quarry in Portland, Connecticut. consists of a series of several small pegmatite prospects and a beryl-bearing quartz vein exposed by collectors over the years. Januzzi (1976) listed twenty-nine species at this locality. However, as with most such localities in Connecticut, little has been undertaken in the way of systematic research."

"A bright green mineral that occurs at this locality has long been thought by collectors to be bismutite.  The mineral is present as small, variously well-defined pods or stains in at least one of the pegmatite prospect dumps and in the exposed quartz vein. A specimen of this material was X-rayed and microprobed by the Czech Geological Survey with the following result: Bismutoferrite (Milton et al. 1958) is associated with minor bismite (a straw-yellow color). Further investigation at this locality has revealed that bismuthinite occurs intimately associated with minor pyrite in small veins in the pegmatite and in the quartz vein--thus providing the necessary elements for alteration into bright green bismutoferrite. This is the first confirmation of bismutoferrite in Connecticut."

But wait.......A small pegmatite boulder with abundant green staining was pointed to me by Ed Force during the May 2003 field trip.  It was located a couple hundred yards farther up the pipe/powerline ROW from Case quarries and has exactly the assemblage described above by Huff et. al., including the pyrite.  However, Tony Albini, who has not seen this piece, suggested to me that it may be gray emplectite and green brochantite, which he states also occur at Case.  I also notice that the one photo of bismutoferrite in Weissman and Nikischer's 1999 Photographic Guide to Mineral Species shows it as a yellow crust.  Looking at the specimen again, I see shiny black rods and blebs (emplectite?) with the duller gray mass (bismuthinite?), so perhaps the assemblage is pyrite (FeS₂), bismuthinite (Bi₂S₃), and emplectite (CuBiS₂) with secondary bismite (Bi₂O₃) and/or bismutoferrite (BiFe₂(SiO₄)₂OH) and brochantite (Cu₄SO₄(OH)₆).  
Looking at more copper and bismuth minerals in the Photographic Guide, I also came across shiny black wittechenite (Cu₃BiS₃) and bluish-black cuprobismutite (Cu₁₀Bi₁₂S₂₃), both in barite, with a green secondary from a couple places in Germany.  Do these occur in pegmatites?  Stay tuned.

Record information on the fourth pegmatite was published by L. M .Cross in Rocks and Minerals March/April 1987, Volume 62, No. 2, Pages 116-7, A NEW OCCURRENCE OF BERYL AT CASE QUARRIES, PORTLAND, CONNECTICUT. Interestingly, none of the U. S. Bureau of Mines borings drilled in 1943 (see above) intersected this 4th pegmatite.

"During the fall of 1983 a fourth pegmatite was discovered within this group. This pegmatite has yielded individual beryl crystals weighing over 22 kilograms and clusters of up to seven prismatic crystals, each crystal five to seven centimeters in diameter....The wall and intermediate zones total up to 30 centimeters or so in thickness on the west and east sides parallel to the strike of the pegmatite. The exposed core measures up to 5 meters across....The beryl crystals are arranged with their long axes roughly perpendicular to the zone contacts (see figure). The growth is tapered, starting in the wall zone, and forms rounded crystals of increasing diameter until the quartz core boundary is reached. Here the crystals grow with the normal sharp hexagonal shape of beryl. Not all crystals reach the quartz core. The tapered crystals imply a system­atic process of crystallization in which the constituents of the minerals are furnished from the center of the pegmatite consistent with the formation of a simple pegmatite in a closed chamber."

The "no. 4" pegmatite (left in 1988). Beryl in place (upper right) and before reassembly (lower right).