Blackstone Mine, Shullsburg area, Upper Mississippi Valley Dist., Lafayette Co., Wisconsin

7.3 x 3.8 x 4.2 cm

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circa 1975

Well formed Calcite crystals with a high glossy luster on a bed of small Calcite crystals over black colored Sphalerite crystals. The Calcite crystals have a rhombahedral habit with curved edges and corners. The largest crystal is a pale yellow/beige whereas the two crystals at the other end of the specimen are colorless. The Calcite is translucent and seems to glow from within when the light is directed at certain angles. There is also mounded masses of small Marcasite crystals present.

Condition: Good

Flaws: The largest Calcite crystal has internal cleaves.

This mineral is also found in the following galleries: Minerals From the United States | Calcite | Sulfides and Sulfosalts | Minerals Priced Between 25 and 49 Dollars