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South Dakota Mineral Specimens
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OKH-593 Barite and Calcite Elk Creek, South Dakota. Paul and Dawne Dunning Collection. This small cabinet sized example measures 5.9 x 5.2 x 3.4 cm. The barite is 4.6 cm long, single terminated, very gemmy in almost all areas, has a wonderful luster, and is damage free. There is breakage where it was attached to the interior of the vug, as would have to be expected, and one thin internal crack. It sits on the typical yellow calcite providing a nice contrast. The specimen stands on edge for display and looks really nice when it does so. Classic American specimen. $475
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OKH-329 Sinkankasite Barker Mine, Keystone, Pennington Co., South Dakota. Ex. Dr. Steve Chamberlain. This is one of the more difficult rare species to obtain. It is a rare phosphate named after one of our hobbies most famous mineralogists (John Sinkankas). This example is a small acicular spray of crystals, beautifully formed, measuring approx. 1 to 2 millimeters in size. Sorry, no maro lens on this camera. 95$
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OKF-493 Barite Elk Creek, South Dakota. Classic US locality. This single crystal is 3.4 cm in length and gemmy throughout. There is a second crystal contact which runs half the length of one side but the crystal is undamaged. Interesting morphology and fantastic color. 50$
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OKI-144 Pyrite Orman Dam, Belle Forche, Butte Co., South Dakota. Ex. Dr. Steve Chamberlain Collection. An attractive 6.5 cm concretion which came out of the ground in 1990. No pyrite disease problems with this fine specimen. Damage free and displayable. 45$
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OKI-146 Pyrite Orman Dam, Belle Forche, Butte Co., South Dakota. Ex. Dr. Steve Chamberlain Collection. An attractive 3.3 cm concretion which came out of the ground in 1990. No pyrite disease problems with this fine specimen. Damage free and displayable. 45$
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OKF-191 Calcite on Calcite Interior, South Dakota. Ex. Nancy Collins collection. A beautiful calcite on matrix measuring 10.2 x 5.8 x 5.2 cm. The first generation of calcites are large yellow rhombohedrons. This second-generation are clear to white nail head calcites in epitactic overgrowth. They climb up the sides of some of the first generation calcites, even capping some of the terminations. A beautiful display of crystals which is much better in person. $175
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OKD-378 Barite on Calcite Elk Creek, Meade Co., South Dakota. Ex. Nancy Collins Collection. Certainly a classic American specimen that is uncommon to find on today’s market. This one has a pair of parallel growth crystals which are transparent and a rich brown color. The barites are up to 4.3 cm each rising off well formed, yellow calcites. One crystal has a tip ding on its backside. The specimen displays best with support so I have it attached to an acrylic plate at this time. It is 7.5 x 5 x 2 cm in overall size and there is an exceptional luster to the barites. 950$
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OKA-994 Schorl White Elephant Mine, Pringle, SD. Black crystals to 4.5 cm in rose quartz. 6 x 5 x 5 cm piece. Crystals are well formed but poor / no terminations. Unusual location. 8$
