Anatase
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Anatase is a metastable mineral form of titanium dioxide with a tetragonal crystal structure. Although colorless or white when pure, anatase in nature is usually a black solid due to impurities. Three
Anatase Oisans
Black anatase crystals on smoky quartz
Brookite
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Brookite is the orthorhombic variant of titanium dioxide, which occurs in four known natural polymorphic forms. The other three of these forms are akaogiite, anatase and rutile. Brookite is rare compa
Anatase
…anatase in nature is usually a black solid due to impurities. Three other polymorphs (or mineral forms) of titanium dioxide are known to occur naturally: brookite, akaogiite, and rutile, with rutile being the most common and most stable of the bunch. Anatase is formed at relatively low temperatures and found in…
Brookite from Balochistan
Brookite from Pakistan
Cherry-red Brookite from Kharan, Balochistan, Pakistan