Image: <bdi><a href="https://www.wikidata.org/wiki/Q108103612" class="extiw" title="d:Q108103612"><span title="Wikipedian and OpenStreetMap mapper from Cologne, Open Data activist">Raimond Spekking</span></a></bdi> (CC BY-SA 4.0)
triclinicuncommonBorosilicates
Axinite
(Ca,Mn,Fe)3Al2BSi4O15(OH)
The image displays a large, well-formed, brownish-violet axinite crystal exhibiting its characteristic wedge-shaped morphology and vitreous luster.
Axinite Physical Properties
Mohs Hardness
6.5Crystal System
triclinicLuster
vitreousStreak Color
whiteCleavage
good on {100}, distinct on {110}, poor on {001}Fracture
conchoidalSpecific Gravity
3.26Colors
brown, violet-brown, yellow, gray, blueTransparency
transparentType Locality
Piz Vallatscha, Val Medel, Medel (Lucmagn), Surselva Region, Grisons, SwitzerlandMineral Group
BorosilicatesUses
collector, gemstoneAssociated Minerals
quartz, epidote, prehnite, actinolite, calciteRarity
uncommonGeological Context
Axinite typically forms in contact metamorphic rocks, especially in granitic intrusions, veins, and skarns, often associated with boron-rich environments.
