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Quartz and Hematite

Lechang Mine, Guandong Province, China, Bruce Museum Collection 2019.01.04

Allochromatic minerals gain color from impurities. Various impurities, often trace amounts of metals, may allow the same mineral to take on a variety of colors even more striking than the pure form. For example, pure quartz is colorless. Iron purities give these quartz crystals their rich red color, which is emphasized by the dark black hematite. This specimen is part of the Robert R. Wiener Mineral Collection.

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