Calcite with brown-red intersecting pyramid druzy Spider jasper Chalcopyrite's tarnishing process can occur

Chalcopyrite's tarnishing process can occur naturally

but they have the same color as the rest of the piece due to hematite (iron oxide) inclusions dusting their interiors

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The matte brown mineral coating the specimen is lizardite

Calcite with brown-red intersecting pyramid druzy Spider jasper Chalcopyrite's tarnishing process can occurLocale: Santa Eulalia, Chihuahua, Mexico Approx dimensions: 5 x 2. 5 x . 75" Approx weight: 112g This calcite specimen from Santa Eulalia is a lovely deep red color from hematite (iron oxide) inclusions. An irregular shaped piece of matrix is covered in glittering red calcite druzy on both sides, and in cracks on the sides. Studied closely, this piece has well formed crystals with beautiful geometry. The druzy is in fact composed of small intersecting