Mineral · Rutile group
Anatase
TiO2
Anatase is the tetragonal dipyramidal polymorph of titanium dioxide, found as small blue, brown or black bipyramids in Alpine clefts (Binntal, Switzerland), Hardangervidda (Norway) and Pakistan. It is a thumbnail-collector's mineral; sharp blue Norwegian crystals on quartz are the finest. Its steep bipyramids distinguish it from rutile prisms.
| Formula | TiO2 |
|---|---|
| IMA status | grandfathered |
| Crystal system | Tetragonal |
| Mohs hardness | 5.5–6 |
| Group | Rutile group |
| Type locality | None |
| Streak | White to pale yellow |
| Specific gravity | 3.9 |
| Reference list | IMA List of Minerals (RRUFF) — verify formula and status against the current list |
Elsewhere
Cite this article
Stratum Strata. "Anatase" (Mineral). Stratum Strata pack 2026.09, as of 2026-09-21. https://stratum.black/strata/minerals/anatase. Accessed 2026-09-21.
@misc{stratum-anatase,
title = {Anatase},
author = {{Stratum Strata}},
howpublished = {\url{https://stratum.black/strata/minerals/anatase}},
year = {2026},
note = {Mineral article, Stratum Strata pack 2026.09, as of 2026-09-21; sources: stratum, wikidata, commons. Accessed 2026-09-21.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.