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A Geoscience Digital Image Library

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TitleCallaghanite from Nye County, Nevada
DescriptionCallaghanite is know for it blue to indigo (or violet or purple) color. It's formula is Cu2Mg2(CO3)(OH)6·2H2O. Nye County, Nevada, is one of the few places where it has been found. There, it is a secondary mineral found in a magnesite-dolomite rock. In this small specimen (1 cm across) it is accompanied by hydromagnesite and possibly brucite.
LocationUSA ▹ Nevada ▹ Nye. Near Gabbs. Gabbs Refractory, Inc. Mine.
PhotographerShannon Heinle. 2001-06-25.
CollectionUniversity of North Dakota Mineralogy Collection #724.
Key wordscallaghanite, nevada
Tech details83 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number837