Anatase - search on eBay
Anatase is one of the three mineral forms of titanium dioxide (the other two being brookite and rutile). It is always found as small, isolated and sharply developed crystals, and like rutile, a more commonly occurring modification of titanium dioxide, it crystallizes in the tetragonal system. It was on account of this steeper pyramid of anatase that the mineral was named, by RJ Haüy in 1801, from the Greek anatasis, "extension," the vertical axis of the crystals being longer than in rutile. Anatase - search on eBay here.
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