Item talk:Q162335
From geokb
Mindat Short Description
The aluminum analogue of Eskolaite, Hematite, and Karelianite. The red (Cr-bearing) gem variety is called Ruby. The blue (Fe- and Ti-bearing) gem variety is called Sapphire.
Compare 'silicon spinel', that might possibly be similar to the gamma f...
Geoscience Ontology Status Notes
Mineral name has been known since antiquity and predates any formal descriptive publication.
IMA Formula (from Mindat)
Al2O3
RRUFF Formula (from Geoscience Ontology)
Al2O3
