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)
hexagonalvery-rareBorates
Jeremejevite
Al₆(BO₃)₅(F,OH)₃
This image displays a well-formed, pale blue, prismatic Jeremejevite crystal, exhibiting its characteristic hexagonal habit and vitreous luster.
Jeremejevite Physical Properties
Mohs Hardness
6.5Crystal System
hexagonalLuster
vitreousStreak Color
whiteCleavage
poor/indistinct on {1010}Fracture
conchoidalSpecific Gravity
3.29Colors
pale blue, colorless, white, pale yellow, violet-blue, greenish-blueTransparency
transparentType Locality
Erongo Mountain, Usakos and Omaruru Districts, Erongo Region, NamibiaMineral Group
BoratesUses
collector's mineral, gemstoneAssociated Minerals
quartz, tourmaline, feldspar, topaz, fluoriteRarity
very-rareGeological Context
Jeremejevite is a rare borate mineral typically found in granite pegmatites and metasomatic rocks, often associated with other pegmatitic minerals.
