Corundum (Var: Sapphire)

Corundum (Var: Sapphire) : Al₂O₃

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Locality: Calumet Mine (Calumet; Calumet No. 2; Hecla; Hecla No. 2; Calumet Iron Mine; Calumet-Hecla-Smithville Magnetite Deposit; Patented Placer Claims: Calumet; Hecla-Williamson; Smithville No. 2; CF&I Company Mine), Turret District, Chaffee Co., Colorado, USA

Field of view approximately 3 inches. Specimen was cleaned in Iron-out to remove iron oxide coating. Crystals are up to 0.75 cm across, but only 1-2 mm thick.

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Corundum (Var: Sapphire)

Corundum (Var: Sapphire) : Al2O3

Corundum (Var: Sapphire) : Al₂O₃