Dragon Minerals - Update November 23, 2018

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25023: Benstonite, Fluorite and Calcite - $125
Minerva No. 1 Mine, Cave-in-Rock, Illinois-Kentucky Fluorspar District, Hardin County, Illinois
Cabinet - 10.7 x 9.7 x 6.7 cm (4.2 x 3.8 x 2.6 inches)
Specimen status: Sold

A pagoda-like obelisk of off-white, opaque benstonite, composed of many stacked plates and epitaxial on calcite, rises 6.1 cm above a fluorite/sphalerite matrix. Aside from one small contact point on the display face this benstonite mountain is undamaged. Weakly fluorescent under both longwave and shortwave UV. Benstonite is an uncommon barium calcium magnesium carbonate, Ba6Ca6Mg(CO3)13. The matrix consists of fluorite cubes, transparent to opaque, mostly yellow with some blue outer zones. Minor sphalerite also present in the matrix. Not the most photogenic specimen, but an uncommon species. Needs a stand for proper display.

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