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)
tetragonaluncommonOxides
Anatase
TiO2
The image displays sharp, dark, lustrous tetragonal crystals of anatase, likely black or dark brown, contrasting against a lighter matrix identified as albite.
Anatase Physical Properties
Mohs Hardness
5.5Crystal System
tetragonalLuster
adamantineStreak Color
white to pale yellowCleavage
perfect on {001} and {111}Fracture
subconchoidalSpecific Gravity
3.8Colors
brown, yellow, blue, black, reddish-brown, violetTransparency
transparent to opaqueType Locality
Hardangervidda, Hordaland, NorwayMineral Group
OxidesUses
minor ore of titanium, pigment, photocatalyst, collectorAssociated Minerals
albite, quartz, feldspar, rutile, brookiteRarity
uncommonGeological Context
Anatase is a low-temperature polymorph of titanium dioxide, typically forming in igneous and metamorphic rocks, often in hydrothermal veins or as an alteration product of other titanium minerals.
