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Chrysoprase is a bright apple green, translucent stone, whose color often caused ancient jewelers to confuse it with Emerald. A cryptocrystalline C...

Chrysocolla, a hydrous copper silicate, is often mistaken for turquoise due to its rich blues and blue to greens. It often also occurs with colors ...

Calcite is a rock-forming mineral that is extremely common and found throughout the world in sedimentary, metamorphic, and igneous rocks. Calcite i...