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Mineralpedia Details for Chrysoberyl

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Chrysoberyl

Chrysoberyl

Named after the Greek word chryso, which means “golden,” in reference to the mineral’s typical color, and likely after the beryllium content of the mineral, although most sources will tell of it being named after the Greek beryllos, which means “beryl,” despite the fact that Chrysoberyl and beryl are two completely unrelated minerals. Chrysoberyl is an uncommon mineral, but widespread and notable localities include in Brazil, the Czech Republic, Russia, Madagascar, Zimbabwe, Sri Lanka, and the United States. Chrysoberyl can be found in granite pegmatites and as a detrital mineral.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/chrysoberyl.pdf

Formula
BeAl2O4 
Crystal System
Orthorhombic 
Crystal Habit
Twinning Common, Prismatic, Tabular 
Cleavage
Distinct, Imperfect, Imperfect 
Luster
Vitreous (Glassy) 
Color
blue green, brown, brownish green, green, gray 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
8.5 
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Chrysoberyl from Espirito Santo, Brazil

Chrysoberyl
            from Espirito Santo, Brazil

Yellowish green, translucent twinned crystal. Scale 2x2cm.

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Chrysoberyl from Fazenda Santa Isabel, Pancas, Espírito Santo, Brazil

Chrysoberyl
            from Fazenda Santa Isabel, Pancas, Espírito Santo, Brazil

Gorgeous, lustrous and gemmy, cyclic twinned Chyrsoberyl from the classic locality Espirito Santo. Nearly complete 360 twin not quite, instead has several other 1cm crystals attached. 

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Chrysoberyl from Novello mine, Fort Victoria, Masvingo dist., Zimbabwe

Chrysoberyl
            from Novello mine, Fort Victoria, Masvingo dist., Zimbabwe

Group of three cyclic-twin Chrysoberyl variety Alexandrite crystals to 1cm that are a nice grape-purple in the photos, but an equally beautiful green in person. The pleochroism is quite spectacular and we absolutely could not capture the green color on camera.

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Chrysoberyl from Greenfield, Greenfield Township, Saratoga Co., New York, United States

Chrysoberyl
            from Greenfield, Greenfield Township, Saratoga Co., New York, United States

Pegmatite specimen with lime greenish yellow plates of twinned Chrysoberyl the largest shown to 1.3cm.

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