Linwood Quarry, Buffalo, Scott Co., Iowa, USA

8 x 8.2 x 4.7 cm
Largest Calcite XL is 1.3 x 1.7 x 0.7
3.1 x 3.2 x 1.9 in

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Clear twinned Calcite crystals with a high glassy luster associated with sharply pointed Marcasite crystals. With all of the surfaces, the specimen has a sparkly appearance. The Calcite and Marcasite are on all sides of the specimen which has a limestone matrix at its core. The specimen is in fairly good condition   although several of the Calcite crystals are bruised.