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)
triclinicuncommonSilicates
Kyanite
Al2SiO5
The image shows a cluster of bladed, deep blue kyanite crystals, some with lighter blue zones, exhibiting a vitreous to pearly luster.
Kyanite Physical Properties
Mohs Hardness
4.5Crystal System
triclinicLuster
vitreousStreak Color
whiteCleavage
Perfect on {100}, good on {010}Fracture
splinterySpecific Gravity
3.6Colors
blue, white, gray, green, black, colorlessTransparency
transparentType Locality
Galiléia, Doce valley, Minas Gerais, Southeast Region, BrazilMineral Group
SilicatesUses
refractory materials, ceramics, abrasives, gemstoneAssociated Minerals
quartz, mica, garnet, staurolite, andalusite, sillimaniteRarity
uncommonGeological Context
Kyanite is a metamorphic mineral typically found in schists and gneisses, indicating high-pressure and low-to-moderate temperature conditions during its formation from aluminum-rich sediments.
