Red Beryl from Wah Wah Mountains, Utah

 

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Walter R. Kellogg

 

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Mineral Specimen #6534    Freibergite, Calcite

Boulder Co., Colorado

7 x 5 x 4 cm
2.8 x 2 x 1.6 in

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(Ag,Cu,Fe)12(Sb,As)4S13


One face of this specimen is covered with intermixed small Calcite crystals are Freibergite crystals. The Freibergite crystals are black in color and most have a high metallic luster which gives them a sparkly appearance. There are some crystals with a dull luster. A few of the crystals are striated..

Condition: Good

Flaws: There is some bruising of the Calcite crystals, but most of the Friebergite are in excellent condition. The specimen is a good candidate for trimming.

This mineral is also found in the following galleries: Minerals From the United States | Sulfides and Sulfosalts | Calcite | Rare Minerals | Minerals Priced Between 25 and 49 Dollars