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)
monoclinicuncommonsilicates
Euclase
BeAlSiO4(OH)
This image displays a well-formed, transparent, pale blue euclase crystal exhibiting distinct crystal faces and a bright vitreous luster.
Euclase Physical Properties
Mohs Hardness
7.5Crystal System
monoclinicLuster
vitreousStreak Color
whiteCleavage
perfect on {010}Fracture
conchoidalSpecific Gravity
3.05Colors
colorless, white, pale blue, pale green, yellowTransparency
transparentType Locality
Boa Vista, Rodrigo Silva, Ouro Preto, Minas Gerais, BrazilMineral Group
silicatesUses
jewelry, collectorAssociated Minerals
quartz, feldspar, topaz, phenakite, mica, berylRarity
uncommonGeological Context
Euclase typically forms in beryllium-rich pegmatites, often associated with other rare minerals. It can also be found in alpine-type veins and certain metamorphic rocks.
