{"title":"Steve Potvin Collection","description":"\u003cp\u003eSteve is a friend and fellow mineral collector currently living in Calgary, Alberta, Canada. Steve amassed a sizeable reference collection of a diverse variety of minerals and lapidary materials. One of Steve's specializations was of calcite. Honestly when he first told me about the calcites I was underwhelmed...until I saw them! I did not have any idea how diverse worldwide calcites could be. Steve managed to create an important calcite collection on a reasonable budget bringing together a crazy assortment of shapes, forms and localities. Perhaps the most impressive are the spiky calcites he obtained from Java, Indonesia. As I am told, Steve was working with an Indonesian mineral dealer by video one day and towards the end of their business Steve noted some incredible calcites on a shelf behind the dealer's desk. The dealer apparently had a small mine prospect that intersected a cavity full of one-of-kind calcites, which they eventually collected. Using video, Steve remotely cherry-picked the best 20 specimens from approximately two tonnes of material! This must have been quite a feat, never mind the successful transportation of these delicate masterpieces to Canada. The prospect did not meet local health and safety regulations and so had to be abandoned so no more calcites from that find are expected anytime soon. Rocky Mountain Minerals \u0026amp; Fossils is proud to be offering many of Steve's specimens as he unwinds his collection via our shows and on this website. While most of the Java calcites have already been sold, there are plenty of other minerals from Steve's treasure chest to enjoy! Thank you Steve for the opportunity to work with you!\u003c\/p\u003e","products":[{"product_id":"kermesite-kolarsky-vrch-pezinok-slovakia","title":"Kermesite - Kolarsky Vrch, Pezinok, Slovakia","description":"\u003cp\u003eAlso known as \u003cstrong\u003e\"red antimony\", kermesite\u003c\/strong\u003e is a antimony oxysulphide which is certainly an uncommon combination of elements. Beautiful and rare aptly describe kermesite and our example does not disappoint. Recently acquired from a Calgary collection, this cabinet-sized specimen of ore shows several radial crystal groups of kermesite. The metallic ruby red colour of the acicular crystals is stunning. Other species are present but I have yet to identify them. This big specimen weighs almost 4 kg\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e Kermesite\u003cbr\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Nova Alexander Adit, Kolarsky Vrch, Pezinok, Slovakia\u003cbr\u003e\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Triclinic\u003cbr\u003e\u003cstrong\u003eMineral Class:\u003c\/strong\u003e Sulfides\u003cbr\u003e\u003cstrong\u003eProvenance:\u003c\/strong\u003e Ex Steve Potvin\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 10 × 14 × 15 cm\u003c\/p\u003e\n\u003c!----\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":49481331736858,"sku":"","price":1500.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/IMG_9299.jpg?v=1723520522"},{"product_id":"calcite-on-quartz-guilin-guanjxi-china","title":"Calcite on Quartz - Guilin, Guanjxi, China","description":"\u003cp\u003eMother Nature is truly an artist. Here we have two relatively common minerals but in a wonderful, eye-appealing combination. The \u003cstrong\u003ecalcite \u003c\/strong\u003ehas a pleasing coffee colour with \"nail-head\" crystal terminations, which contrasts nicely with the white drusy quartz; itself in botryoidal masses.  Ex Steve Potvin collection. From \u003cstrong\u003eGuilin, Guanjxi, China\u003c\/strong\u003e. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e Calcite on Quartz\u003cbr\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Guilin, Guangxi, China\u003cbr\u003e\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Trigonal\u003cbr\u003e\u003cstrong\u003eMineral Class:\u003c\/strong\u003e Carbonates\u003cbr\u003e\u003cstrong\u003eProvenance:\u003c\/strong\u003e Ex Steve Potvin Collection\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 3 × 6 × 8.5 cm\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":49670833340698,"sku":"","price":95.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/IMG_0639.jpg?v=1726527315"},{"product_id":"apatite-minas-gerais-brazil","title":"Apatite (Hydroxylapatite) - Sapo Mine, Minas Gerais, Brazil","description":"\u003cp\u003e\u003cstrong\u003eThe Sapo Mine in Brazil\u003c\/strong\u003e produced some of the nicest \u003cstrong\u003ehydroxylapatites \u003c\/strong\u003eever found in the early 2000s (notably 2004-2005). Hydroxylapatite, reclassified as apatite-(CaOH), is rarer than the more common fluorapatite. This nice plate displays green hydroxylapatites, with hexagonal bipyramidal habit, on microcline. A quick internet search will show this as a classic example of the famous finds at Sapo, with the Mindat.org example looking like it might actually fit into this piece! The crystals, additionally, have nice yellow fluorescence under long wave UV light. This is another specimen that has traveled with me to several shows and I am shocked I still have it, especially at this price! Ex Steve Potvin collection. From: Sapo Mine, Conselheiro Pena, Minas Gerais, Brazil. \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e Apatite-(CaOH) (formerly Hydroxylapatite)\u003cbr\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Sapo Mine, Conselheiro Pena, Minas Gerais, Brazil\u003cbr\u003e\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Hexagonal\u003cbr\u003e\u003cstrong\u003eMineral Class:\u003c\/strong\u003e Phosphates\u003cbr\u003e\u003cstrong\u003eProvenance:\u003c\/strong\u003e Ex Steve Potvin Collection\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 5.5 × 8 cm\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":51500435407130,"sku":null,"price":100.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/IMG_3271.jpg?v=1766899178"},{"product_id":"rhodocrosite-capillitas-district-catamarca-province-argentina-1","title":"Rhodochrosite - Capillitas district, Catamarca Province, Argentina","description":"\u003cp\u003eHere is a terrific rhodochrosite stalactite \"slice\" from Argentina. The mine owners essentially sliced and polished all the stalactites they could collect so finding an intact specimen is quite rare. Most specimens are flat slices whereas this piece is naturally concave on one end. This specimen might be the next best thing to a complete stalactite as this piece is the very end tip of a stalactite! Like the say in the collector car market, try to find another. This slice, additionally, has a very striking pattern with great colour and luster. Ex Steve Potvin collection. From: Capillitas mining district, Catamarca Province, Argentina. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMineral:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eRhodochrosite\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eLocality:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eCapillitas \u003c\/span\u003e\u003cspan\u003eMining \u003c\/span\u003e\u003cspan\u003eDistrict, \u003c\/span\u003e\u003cspan\u003eCatamarca \u003c\/span\u003e\u003cspan\u003eProvince, \u003c\/span\u003e\u003cspan\u003eArgentina\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eCrystal \u003c\/span\u003e\u003cspan\u003eSystem:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eTrigonal\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eMineral \u003c\/span\u003e\u003cspan\u003eClass:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eCarbonates\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eProvenance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eEx \u003c\/span\u003e\u003cspan\u003eSteve \u003c\/span\u003e\u003cspan\u003ePotvin \u003c\/span\u003e\u003cspan\u003eCollection\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e4.5 × \u003c\/span\u003e\u003cspan\u003e4 × \u003c\/span\u003e\u003cspan\u003e2 \u003c\/span\u003e\u003cspan\u003ecm\u003c\/span\u003e\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":51893596881178,"sku":null,"price":525.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/IMG_5598_1.jpg?v=1775362138"},{"product_id":"almadine-garnet","title":"Almandine Garnet - Stapfenalm, Stilluptal, Zillertal, Tyrol, Austria","description":"\u003cp\u003eA beautiful \u003cstrong\u003ealmandine garnet \u003c\/strong\u003especimen from\u003cstrong\u003e Stapfenalm, Stilluptal, Zillertal, Tyrol, Austria\u003c\/strong\u003e. This classic Alpine specimen features a rich cluster of well-formed garnet crystals covering the matrix, with colors ranging from deep reddish-brown and burgundy to warm orange-red where the crystals catch the light.\u003c\/p\u003e\n\u003cp\u003eThe numerous lustrous, sharply defined crystals create an attractive three-dimensional surface, while the contrasting pale and micaceous matrix highlights the garnets' rich coloration. Several crystals show attractive translucency, particularly around their edges and under stronger illumination.\u003c\/p\u003e\n\u003cp\u003eThe specimen is mounted on a clear acrylic display base and has passed through the collections of Steve Potvin and Gawan Fiore.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e Almandine Garnet\u003cbr\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Stapfenalm, Stilluptal, Zillertal, Tyrol, Austria\u003cbr\u003e\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Cubic (Isometric)\u003cbr\u003e\u003cstrong\u003eMineral Class:\u003c\/strong\u003e Nesosilicate\u003cbr\u003e\u003cstrong\u003eProvenance:\u003c\/strong\u003e Ex Steve Potvin Collection; Ex Gawan Fiore Collection\u003cbr\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e: 4 x 3.5 x 3 cm\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":52720289186074,"sku":null,"price":350.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/almandine_garnet02k.jpg?v=1787767557"},{"product_id":"marcasite-starkville-mississippi-usa","title":"Marcasite - Starkville, Mississippi, USA","description":"\u003cp\u003eAn attractive \u003cstrong\u003emarcasite \u003c\/strong\u003ecrystal specimen from\u003cstrong\u003e Starkville, Mississippi, USA\u003c\/strong\u003e, featuring a dense cluster of sharply formed metallic crystals arranged in a striking three-dimensional formation. These crystals are found in the Selma Chalk exposed by excavation in numerous sites near Starkville. \u003cbr\u003eThis particularly nice specimen displays the characteristic brassy-grey to metallic coloration of marcasite, with numerous pointed and bladed crystals showing distinctive textured and striated surfaces. The tightly intergrown crystals create an intricate sculptural appearance, with individual terminations projecting in multiple directions. I have had this specimen for a year or two and there has been no evidence of any disintegration that some marcasite is susceptible to. This is a nice, sturdy little specimen!\u003cbr\u003eMounted on a clear acrylic display base, this specimen presents beautifully from several angles and was recently acquired from my friend and fellow Calgarian, Steve Potvin.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMineral:\u003c\/strong\u003e Marcasite\u003cbr\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Starkville, Mississippi, USA\u003cbr\u003e\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Orthorhombic\u003cbr\u003e\u003cstrong\u003eMineral Class:\u003c\/strong\u003e Sulphides\u003cbr\u003e\u003cstrong\u003eProvenance:\u003c\/strong\u003e Ex Steve Potvin Collection\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 2.7 x 3.5 2.5 cm\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":52721033838874,"sku":null,"price":100.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/marcasite01.jpg?v=1787769050"},{"product_id":"fluorite-nikolaevskiy-mine-dalnegorsk-russia","title":"Fluorite with Sphalerite - Nikolaevskiy Mine, Dalnegorsk, Russia","description":"\u003cp\u003e\u003cspan\u003eA striking cluster of colourless, transparent to translucent \u003cstrong\u003efluorite\u003c\/strong\u003e crystals reminiscent of an icy sculpture. The specimen is dominated by a large, sharply defined crystal, accompanied by numerous intergrown crystals with highly reflective faces and attractive internal textures. At first glance, this larger crystal appears damaged but actually shows complex, natural edges and is complete. Additionally, well-formed black \u003cstrong\u003esphalerite\u003c\/strong\u003e crystals are sprinkled about one side of the specimen adding welcome contrast.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cstrong\u003eNikolaevskiy Mine \u003c\/strong\u003eat\u003cstrong\u003e Dalnegorsk\u003c\/strong\u003e is a renowned Russian locality known for producing exceptional fluorite and crystallized sulphide specimens. Its colourless fluorite is especially admired for its exceptional clarity and sculptural crystal forms. Prices for these colourless fluorites have recently spiked so I do not expect this one to last! Mounted on an acrylic base.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMineral: Fluorite with Sphalerite\u003cbr\u003eLocality: Nikolaevsky Mine, Dalnegorsk, Primorsky Krai, Russia\u003cbr\u003eCrystal System: Cubic (Isometric)\u003cbr\u003eMineral Class: Halides\u003cbr\u003eProvenance: Ex Steve Potvin Collection\u003cbr\u003eDimensions: 7 × 5.5 × 7 cm\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":52741991170330,"sku":null,"price":450.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/fluorite-nikolaevskiy-mine-russia-01.jpg?v=1787691680"},{"product_id":"calcite-on-basalt-zhejiang-province-china","title":"Spherical Calcite on Basalt - Zhejiang Province, China","description":"\u003cp\u003e\u003cspan\u003eAn unusual and sculptural \u003cstrong\u003eChinese\u003c\/strong\u003e specimen featuring rounded, pale yellow \u003cstrong\u003ecalcite\u003c\/strong\u003e formations within dark brown basalt matrix. Several large spherical aggregates are accompanied by numerous smaller rounded growths across the cavity surface, creating an intriguing landscape-like appearance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe calcite formed as secondary mineralization within cavities in the volcanic basalt. Its soft yellow colour and textured surfaces contrast strongly with the dark, rugged matrix. This is certainly an eye-catching piece and was recently part of Steve Potvin's extensive calcite collection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMineral:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Calcite\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eLocality:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Zhejiang Province, China\u003cbr\u003e\u003c\/span\u003e\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Trigonal\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eMineral Class: \u003c\/span\u003e\u003c\/strong\u003eCarbonates\u003cstrong\u003e\u003cspan\u003e\u003cbr\u003eProvenance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ex Steve Potvin Collection\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 8 × 4.5 × 5 cm\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":52742040715546,"sku":null,"price":125.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/spherical-calcite-basalt-zhejiang-china-01.jpg?v=1787693445"},{"product_id":"spherical-calcite-on-basalt-campomorto-quarry-italy","title":"Spherical Calcite on Basalt - Campomorto Quarry, Italy","description":"\u003cp\u003e\u003cspan\u003eA distinctive \u003cstrong\u003eItalian specimen\u003c\/strong\u003e featuring numerous translucent pale yellow \u003cstrong\u003ecalcite spheres\u003c\/strong\u003e lining a shallow cavity in dark basalt. Several rounded aggregates rise prominently above the matrix, while smaller calcite balls are scattered across the sparkling brown cavity surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis spherical calcite habit is characteristic of the \u003cstrong\u003eCampomorto Quarry\u003c\/strong\u003e, where calcite formed as secondary mineralization within vesicles and cavities in volcanic basalt. The bright yellow spheres create an attractive contrast against the dark, rugged matrix.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOne of my absolute favourite specimens recently obtained from friend and follow Calgary collector, Steve Potvin. Thanks Steve!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMineral:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Calcite\u003cbr\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Campomorto Quarry, Pietra Massa Locality, Montalto di Castro, Viterbo Province, Lazio, Italy\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Trigonal\u003cbr\u003e\u003cstrong\u003eMineral Class:\u003c\/strong\u003e Carbonate\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eProvenance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ex Steve Potvin Collection\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 6 cm × 7 cm × 4.5 cm\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":52742069879066,"sku":null,"price":185.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/calcite-basalt-campomorto-quarry-italy-02.jpg?v=1787693857"},{"product_id":"aragonite-bird-s-nest-with-cave-pearls-styrian-erzberg-austria","title":"Aragonite “Bird’s Nest” with Cave Pearls - Styrian Erzberg, Austria","description":"\u003cp\u003e\u003cspan\u003eAn unusual aragonite formation commonly known as \u003cstrong\u003e“Bird’s Nest” aragonite\u003c\/strong\u003e, featuring numerous rounded \u003cstrong\u003ecave pearls\u003c\/strong\u003e nestled within a broad grey, cream and tan aragonite sinter formation. Of course this is not really a bird's nest but certainly resembles one, hence the name. The mixture of smooth pearl-like forms, rounded pisolitic growths and textured surfaces gives this specimen a fascinating organic appearance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCave pearls form when mineral-rich water deposits successive layers of calcium carbonate around small nuclei such as grains of sand or rock fragments. Their resemblance to eggs resting within the surrounding aragonite formation gives specimens of this type their descriptive “Bird’s Nest” name. Finding a formation of this size (and keeping it intact during extraction) is certainly impressive.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe specimen comes from the historic \u003cstrong\u003eStyrian Erzberg iron mine \u003c\/strong\u003enear\u003cstrong\u003e Eisenerz, Austria\u003c\/strong\u003e, a locality known for secondary calcite and aragonite formations. It was formerly part of the Steve Potvin Collection, and the accompanying collection label is included. A truly fascinating conversation piece.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMineral:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Aragonite\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eFormation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Cave pearls; Pisolitic aragonite\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eLocality:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Erzberg Mine, Eisenerz, Leoben District, Styria, Austria\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eProvenance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ex Steve Potvin Collection\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 17 cm × 13 cm × 3 cm\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":52742109954330,"sku":null,"price":250.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/aragonite-birds-nest-erzberg-austria-02.jpg?v=1787695841"},{"product_id":"scalenohedral-calcite-with-pyrite-anhui-province-china","title":"Scalenohedral Calcite with Pyrite – Anhui Province, China","description":"\u003cp\u003eA striking \u003cstrong\u003escalenohedral calcite\u003c\/strong\u003e specimen with associated \u003cstrong\u003epyrite\u003c\/strong\u003e from \u003cstrong\u003eAnhui Province, China\u003c\/strong\u003e, featuring two large, sharply formed calcite crystals with attractive pale golden to honey coloration.\u003c\/p\u003e\n\u003cp\u003eThe specimen is dominated by elongated scalenohedral calcite crystals exhibiting the dramatic pointed habit often referred to by collectors as \u003cstrong\u003e“dogtooth calcite.”\u003c\/strong\u003e The crystals show translucent areas, prominent crystal faces and a vitreous luster, while small pyrite inclusions or associations provide additional visual interest and metallic contrast.\u003c\/p\u003e\n\u003cp\u003eThe combination of impressive crystal size (with no tip damage), distinctive scalenohedral form and warm coloration makes this an attractive display specimen.\u003c\/p\u003e\n\u003cp\u003eAnother terrific calcite from Steve Potvin.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMinerals:\u003c\/strong\u003e Calcite, Pyrite\u003cbr\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Anhui Province, China\u003cbr\u003e\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Trigonal (Calcite); Cubic (Pyrite)\u003cbr\u003e\u003cstrong\u003eMineral Class:\u003c\/strong\u003e Carbonate, Sulfide\u003cbr\u003e\u003cstrong\u003eProvenance:\u003c\/strong\u003e Ex Steve Potvin \u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 10 × 6 cm\u003c\/p\u003e","brand":"Rocky Mountain Minerals and Fossils","offers":[{"title":"Default Title","offer_id":52749701284122,"sku":null,"price":100.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/files\/Scalenohedral-Calcite-Pyrite-Anhui-Province-China02.jpg?v=1787869577"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6011\/1386\/collections\/Java_Calcite.jpg?v=1787789024","url":"https:\/\/keithrocks.ca\/collections\/steve-potvin-collection.oembed","provider":"Rocky Mountain Minerals and Fossils","version":"1.0","type":"link"}