Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
orthorhombicuncommonOxides
Chrysoberyl
BeAl₂O₄
This specimen features a relatively large, sharp, twinned crystal of chrysoberyl, displaying a yellowish-green to golden-yellow hue. The crystal exhibits an incredibly sharp form, noted for its distinct twinning pattern.
Chrysoberyl Physical Properties
Mohs Hardness
8.5Crystal System
orthorhombicLuster
vitreousStreak Color
whiteCleavage
distinct on {110}, poor on {010} and {100}Fracture
conchoidal to unevenSpecific Gravity
3.7Colors
yellow, yellowish-green, green, brownTransparency
transparentType Locality
Espirito Santo, BrazilMineral Group
OxidesUses
jewelry, collectorAssociated Minerals
quartz, feldspar, mica, beryl, tourmalineRarity
uncommonGeological Context
Chrysoberyl typically forms in granitic pegmatites, mica schists, and sometimes in contact metamorphic deposits. Its high hardness allows it to be found in alluvial deposits as well.
