December 2010 Update
The following specimens from Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut are the ones discussed in Joe Polityka's recent Springfield Show review in The Mineralogical Record, Nov.- Dec. 2010, p. 547. I hope you enjoy them as much as I have enjoyed photographing and describing them.
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OKH-362 Quartz Stalactite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. This well formed stalactite measures 6 x 5 x 3.8 cm. The quartz are lustrous and clean. It stands on end nicely for display and offers good views from any side. Backside has a scrapped area at its base otherwise damage free. Attractive and unusually nice for the locale. 50$
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OKH-363 Quartz and Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An aesthetic cabinet specimen measuring 9.5 x 6.7 x 4.2 cm. Double dome of single terminated quartz crystals to over 2 cm each on calcite. The quartz is gemmy and have minor hematite inclusions/ staining. Several quartz are missing and one calcite is cleaved. Specimen has crystallization on base as well. Views nicely from any direction. All in all, a good specimen which displays well but has been priced low due to the damage. 90$
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OKH-364 Quartz, Calcite and Stipnomeline on Quartz casts after Anhydrite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An aesthetic small cabinet specimen measuring 8 x 5.4 x 3 cm. Lots going on in the paragenesis of this specimen. Casts are visible from base while the top view shows calcites to 2 cm each with quartz crystals. Stipnomeline fills in between some of the primary crystals. Breakage to one big calcite on edge from specimen extraction (as would be expected), otherwise clean. 85$
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OKH-365 Calcite on Quartz casts after Anhydrite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An aesthetic miniature measuring 4.2 x 3 x 1.9 cm. There are two nicely formed, double terminated calcites on the surface of the cast, to 1.9 cm each. Backside of piece is totally open and better shows the extent of the mineral replacement that will make this type of cast from Roncari a modern day classic. These seem to be the most desired specimens from this new find. This one is an excellent example. 80$
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OKH-366 Quartz Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An aesthetic small cabinet specimen measuring 8.2 x 5 x 4.2 cm with crystals to 2.5 cm each. Great views from three sides on this dome shaped specimen. Minor chalcopyrites and hematite in tiny balls add a nice contrast. Some base crystallization. Minor blasting damage: one missing point and a few very tiny tip dings. Nothing to draw your attention other than the great aesthetics of this exceptional piece. 225$
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RAI-004 Quartz and Chalcopyrite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An aesthetic small cabinet specimen measuring 7.8 x 5.5 x 3.5 cm with crystals to 2.6 cm each. Great views from three sides on this dome shaped specimen. Chalcopyrite crystals and hematite in tiny balls add a nice contrast. Some base crystallization. One small quartz point missing makes this an unusually clean piece. Great example of this attractive, exceptionally nice Roncari material. 260$
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OKH-368 Quartz and Hematite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An aesthetic small cabinet specimen measuring 6.7 x 5 x 3.5 cm. One side of this specimen has a nice coating of beta-habit quartz crystals which are sprinkled with tiny gold/ silver colored hematite blades. One crystal near edge has minor tip damage otherwise in outstanding condition. Really nice example and price. 45$
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OKH-369 Quartz and Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. This miniature shows complex calcites to 2 cm each among glassy clear, alpine quality quartz crystals. No damage. Very attractive piece from any angle. If you like aesthetic miniatures, this would be hard to beat. 60$
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RAI-001 Calcite on Quartz casts after Anhydrite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. These hematite coated quartz are actually a cast after an anhydrite crystal. WOW! Not only that, the calcites to come next are unusual in form and have these wild looking selective face coatings/ phantoms. Together they create a fine visual display. 5.5 x 5 x 4.1 cm overall. No damage to piece. I’ll let the images describe the complexity of this assemblage. Great piece. 200$
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RAI-002 Calcite and Quartz Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. This small cabinet specimen is dominated by a large double terminated calcite measuring over 5 cm. It is amazingly complex and outstanding example of what I believe are the most important calcites from any east coast locality to be found in decades. Great satin to glassy luster (dependant on which face you scrutinize). Selective hematite stains and phantoms. Oh my! The quartz are also great on this damage free specimen. Fine views from all sides. 6 x 4.8 x 4 cm overall. Sits well on its matrix base. I'm thrilled to be offering this fine specimen. 375$
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RAI-003 Quartz, Calcite and altered Chalcopyrite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An aesthetic cabinet specimen measuring 10 x 8 x 6.2 cm. The piece is a shallow dome of quartz, to 2 cm each, on calcite (most of which shows from what I would describe as the back of the piece). Numerous chalcos alterd to brown goethite? And plenty of hematite ball is browns and reds to add excellent contrast. There is a very minor tip ding and two small quartz points missing among the sea of crystals. An excellent quality specimen for Roncari. 250$
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RAI-005 Quartz on Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An aesthetic small cabinet specimen measuring 7.7 x 7.5 x 4 cm. The piece is a perfect dome of calcite which is coated on one edge/ side by fabulous, glassy quartz crystals to 2.4 cm each. One spot may be damage to a small crystal but I can’t really tell even with 10x, so I will describe this as a damage free piece (I think it is internal cracking within a crystal which I am noticing). I’m being way over critical but so few specimens from this active quarry are damage free that I just don’t expect to see such clean specimen like this one. 350$
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OKG-297 Babingtonite and Prehnite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. This amazing thumbnail sized piece is a single crystal of babingtonite measuring a whopping 3.3 x 2.3 x 1.7 cm. That’s simply huge for a classic east coast babingtonite. Minor prehnite. Front view is super while the backside shows attachment to what was likely anhydrite or other prehnite masses. This highly complex crystal is double terminated and stepped in its growth and twisted along its length. Impressive. It is the best babingtonite from this quarry of which I am aware and certainly an important piece. 1,750$
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OKH-375 Calcite, Chalcopyrite, Galena and Dolomite Sweetwater Mine, Viburnum Trend District, Reynolds County, Missouri. This piece is composed of a chunk of dolomite matrix that has double terminated, translucent to transparent crystals to 4 cm each on all sides. There are several contacts on crystals yet the specimen displays well and is certainly display worthy. Its overall measurements come in at 7.4 x 6 x 5.8 cm. My price reflects the outstanding deal I received on this fine specimen. An American Classic that was wrote about in American Mineral Treasures, 2008, p. 66-73. 55$
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OKH-376 Calcite, Chalcopyrite and Dolomite Sweetwater Mine, Viburnum Trend District, Reynolds County, Missouri. This piece measures 7.2 x 4.2 x 3 cm and shows off a beautiful, double terminated crystal of 5.5 cm and several smaller ones, too. The specimen doesn’t stand upright but is damage free and only shows minor matrix to matrix contact. The crystal are all double terminated except one which has a small matrix contact. An American Classic that was wrote about in American Mineral Treasures, 2008, p. 66-73. 48$
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OKH-373 Calcite, Chalcopyrite and Dolomite Sweetwater Mine, Viburnum Trend District, Reynolds County, Missouri. This piece measures 4.9 x 3.5 x 2.7 cm and shows off a beautiful, double terminated crystal. There is a minor contact from another crystal on the base termination. This piece is a perfect miniature in all respects: it stands on end for display, it views wonderfully from any angle, it has sharp form and great terminations, it is a floater and has no damage what so ever. I can’t imagine a better miniature sized calcite specimen from this mine. An American Classic that was wrote about in American Mineral Treasures, 2008, p. 66-73. 90$
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OKH-371 Calcite on Chalcopyrite RESERVED Sweetwater Mine, Viburnum Trend District, Reynolds County, Missouri. This fine example is a plate of transparent crystals to 2 cm each with a mix of iridescent chalcos in various places. Almost a floater with only one small area of edge contact. Back is also slightly crystallized. 5 x 4 x 3.5 cm overall. No damage. My price reflects the outstanding deal I received on this fine specimen. An American Classic that was wrote about in American Mineral Treasures, 2008, p. 66-73. 38$
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OKH-372 Calcite, Chalcopyrite and Dolomite Sweetwater Mine, Viburnum Trend District, Reynolds County, Missouri. This piece is exceptional exhibiting two transparent calcites of 3.9 and 3.4 cm each. They are double terminated and stand of the well crystallized matrix in nice relief. The piece is much better than it appears in the images and is damage free. It stands nicely on end for display and is a damage free floater. 5.4 x 5 x 5.3 cm overall. Spotless! My price reflects the outstanding deal I received on this fine specimen. An American Classic that was wrote about in American Mineral Treasures, 2008, p. 66-73. 55$
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OKF-612 Fluorite Shang Bao Mine, Hunan Prov., China. A fine damage free specimen with crystals coating both sides. Cubes of fluorite are to 1.4 cm each and entire piece measures 7.4 x 5 x 2.5 cm. Cubes are water clear with purple, internal, selective edge phantoms. Minor edge contacts and minor white barite. This is a specimen I would have purchased in the late 1990s and still has a 1990s price. 25$
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OKF-612 Fluorite Shang Bao Mine, Hunan Prov., China. A fine damage free specimen with crystals coating both sides. Cubes of fluorite are to 1.3 cm each and entire piece measures 6.8 x 6.7 x 2.5 cm. Diagonal, 8.5 cm. Cubes are water clear with purple, internal, selective edge phantoms. Contacts on 3 edges and minor white barite. This is a specimen I would have purchased in the late 1990s and still has a 1990s price. 30$
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OKH-377 Witherite Mahoning #1 Mine, Cave-In-Rock, Illinois. Ex. Dr. Steve Chamberlain collection. A beautifully formed grouping of crystals in a bowtie formation. The crystals rest on a very small witherite, fluorite plate. It displays well from any side with no contacts or damage excluding one crystal contact on very back. Nicely fluorescent and phosphorescent. 5.5 x 4.8 x 4.3 cm overall. An outstanding value. 275$
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OKH-377 Witherite Mahoning #1 Mine, Cave-In-Rock, Illinois. Ex. Dr. Steve Chamberlain collection. Several balls of witherite compose this 9.5 x 5 x 6 cm specimen. Strong contacts in several areas so this specimen will not be expensive. Nicely fluorescent and phosphorescent. 95$
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OKF-608 Fluorite and Dolomite Shang Bao Mine, Hunan Prov., China. A fine damage free specimen with crystals coating all sides (a floater). Cubes of fluorite are to 1.5 cm each and entire piece measures 6 x 5 x 3.9 cm. Cubes are water clear with some purple phantoms. An outstanding damage free fluorite specimen that stands on edge and displays well from any side. This is a specimen I would have purchased in the late 1990s with a 1990s price. 25$
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OKH-379 Calcite and Dolomite on Fluorite Mina Jaimina, Caravia, Asturias, Spain. Fine, large, fluorite cubes to 3 cm each on edge compose this beautiful specimen. There is minor brown dolomite and white double terminated calcites to add color and shape contrasts. Minor sulfide inclusions in the calcites and fluorites, as well. The nice thing about this piece is the strong tetrahexihedral form that is quite noticeable on each fluorite. The fluorite surfaces are also highly stepped making the overall appearance quite dramatic. Minor edge contacts and one small fluorite crystal has a minor rub. Attractive and priced to go. 125$
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OKH-380 Titanite with Feldspar Bear Lake Diggings, Maddill Road, Ontario, Canada. Collected by Michael Walter (early 1990’s). This is a single crystal of complex form, nice luster and no damage. It measures in at 5 x 5.5 x 1.3 cm. Minor feldspar and hornblende (fluo-magnesio-kataphorate). A fine floater. These are nearly impossible to find now a days at the site or for sale in fine examples like this one. Very nice in hand and better than the images indicate. 125$
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OKF-648 Spessartine, Feldspar and Quartz Tongbei Area, Yunxiao Co., Fujian Prov., China. An older specimen with a clear, slightly smoky, quartz measuring 3 cm centrally placed among gemmy garnets to .7 cm each. The piece measures 8.1 x 5.8 x 4.2 cm. It is in great shape with only edge contacts. Some hyalite opal adds fluorescence. The base is partially sawn so it sits nicely. 120$
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OKH-381 Spodumene Darrah Peck, Kunar Prov., Afghanistan. A partial etched crystal of good color and outstanding gemminess. 5 x 3 x 1.5 cm. You can't get gem rough at this price! No damage. 50$
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OKH-382 Spodumene Mt. Kheritha, Kala Dharipeche, Kunar Prov., Afghanistan. A complete etched crystal of good color and outstanding gemminess. 8.2 x 3 x 2 cm. No damage. Very complex and aesthetic. A nice quality piece at a decent price for its size. 135$
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OKH-384 Siderite and Albite Poudrette Quarry, Mt. St-Hilaire, Quebec, Canada. Ex. Dr. Steve Chamberlain Collection. This 3.5 x 2.7 x 1.5 cm piece is a couple of tabular siderite twins with the largest measuring at least 3 cm. They are damage free and excellent examples of this classic MSH material. Floater. 80$
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OKH-385 Barite Jaoa Pessoa, Paraiba, Brazil. Ex. James Turek Collection. A fine damage free miniature from this prolific locale. This would have been an early specimen from the site. It is beautifully compsed with a nice cluster of tabular barites to 1.7 cm on edge each. No peripheral damage or contacts (a floater with matrix). Gemmy and with nicely developed phantoms. 90$
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RAI-030 Quartz on Calcite Cast Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. A unique miniature that measures 4.1 x 2 x 2 cm. It is completely hollow implying that it is a cast after another mineral but I am unsure of what species it might be. The opening appears to be the same shape as the cast. Quite unusual. Good luster, form, minor quartz. No damage. Tip of termination has incomplete final growth of calcite. 30$
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RAI-031 Quartz on Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. Numerous large quartz crystals on this dome of calcite. The piece measures 4.5 x 3.8 x 3 cm with quartz crystals to over 3 cm each. Hematite spotting . Very aesthetic display which sits nicely on flat base. Minor damage to back and edge crazing on side of one quartz termination face. Still very nice example with an outstanding frontal side. 45$
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RAI-032 Quartz on Calcite Stalactite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. A cute stalactite with a single and a double terminated quartz (to 2 cm each). The stalactite is 3.9 cm. One quartz crystal missing. Still quite attractive. 25$
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RAI-033 Quartz and Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An aesthetic plate measuring 3.6 x 3 x 1.2 cm. Minor hematite balls. No damage. 15$
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RAI-034 Quartz on Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. A complex piece with lots of flash. Nice quartz all over this domical section of matrix which measures 5.7 x 4.2 x 4 cm overall. One quartz crystal is missing a second termination which is difficult to notice, otherwise in excellent condition. Attractive. 40$
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RAI-035 Quartz on Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. A double terminated quartz measuring 1.5 cm rests on this dome of calcite. The piece measures 4 x 3.8 x 2.5 cm. Back of this damage free specimen is slightly hollow and also crystallized by both calcite and quartz. 40$
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RAI-036 Calcite with minor Quartz Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. A wonderful ball of calcite on minor matrix with minor amounts of transparent quartz. The piece measures 5.3 x 4.2 x 3 cm and has no damage other than its obvious edge contacts with matrix and one tiny cleaved calcite. 50$
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RAI-037 Quartz on Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. Lots of attractive clear (with minor hematite) quartz points on this partial dome of calcite. The piece is 5.4 x 3.3 x 2.7 cm. No damage and aesthetic. 38$
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RAI-038 Quartz on Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An amazing miniature with fine quartz to 2 cm each standing up in high relief off of a calcite ball matrix. Fine views from any side with no damage. 5.4 x 4 x 3.7 cm. Backside is not totally complete. Sits well and is a thing of beauty to view. 120$
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RAI-039 Quartz on Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. A small sliver of matrix calcite with nice crystallization of quartz ( 2.2 cm) and calcite (1.5 cm). 4.2 x 2.2 x 1.7 cm. Attractive and damage free. 30$
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RAI-040 Quartz on Calcite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. An example specimen of one of these balls of calcite with attached quartz. Damage to back. 4.6 x 3.8 x 2.8 cm. 10$
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RAI-041 Apophyllite on Hematite on Yellow Prehnite Roncari Quarry (Tilcon Quarry), East Granby, Hartford Co., Connecticut. This is the only specimen of this type which I have seen. The yellow prehnite, to my knowledge is unheard of from Roncari until now. The specimen is 5.6 x 3.3 x 2.3 with prehnite balls to 2.7 cm. No damage. How very unusual! 80$