Raid Quarry, Dallas City, Hancock Co., Illinois

4.9 x 5.3 x 3 cm
1.9 x 2.1 x 1.2 in

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This specimen is from an obscure location, one of the several, small Dallas City limestone quarries. It exhibits the twinning seen in Calcite specimens from the surronding area. The Calcite has a high, glossy luster and is translucent (almost transparent) and glows when well lit. The surfaces of the crystals show striated, parallel growth lines. At the base of the Calcite crystals, there are cubic Pyrite crystals with a natural reddish iridescence.

Condition: Good

Flaws: There a couple of notchs along tow of the edges of the largest, topmost crystal. There are a few internal cleaves in some of the crystals.

This mineral is also found in the following galleries: Minerals From the United States | Calcite | Sulfides and Sulfosalts | Minerals Priced Between 50 and 99 Dollars