Marcasite on Calcite
Thumbnail, 2.9 x 2.8 x 2.1 cm
San Antonio Mine, Santa Eulalia Mining District, Aquiles Serdan, Chihuahua, Mexico
Ex. Irv Brown

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This is a bright, unusual thumbnail specimen, featuring a rich mixture of textures and colors. A sharply-bladed cluster of metallic, bronze marcasite crystals are accented by a white calcite matrix. The marcasite has a beautiful patina, with a sepia-hued rainbow of color variation.

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