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)
tricliniccommonsilicates
Kyanite
Al2SiO5
This image displays a cluster of elongated, bladed blue kyanite crystals, exhibiting a vitreous luster. The crystals are well-formed and show characteristic parallel growth.
Kyanite Physical Properties
Mohs Hardness
6Crystal System
triclinicLuster
vitreousStreak Color
whiteCleavage
perfect on {100}, good on {010}Fracture
splinterySpecific Gravity
3.6Colors
blue, white, gray, greenTransparency
transparentType Locality
Litchfield, Litchfield County, Connecticut, USAMineral Group
silicatesUses
refractory materials, ceramics, abrasives, gemstoneAssociated Minerals
quartz, muscovite, garnet, staurolite, andalusite, sillimaniteRarity
commonGeological Context
Kyanite is a metamorphic mineral formed under high-pressure, low-to-moderate temperature conditions, typically found in schists and gneisses. It is an indicator mineral for regional metamorphism.
