Colomeraite

colomeraite

loveringite

merrillite

taenite

Images

Formula: NaTi³⁺Si₂O₆
Inosilicate (chain silicate), single chains, clinopyroxene subgroup, pyroxene group, titanium-bearing mineral
Crystal system: Monoclinic
Specific gravity: 3.36 calculated
Hardness: 6 to 7
Environments

Meteorites

Colomeraite is a new mineral, approved in 2021 and to date (August 2026) reported only from the type locality.

Localities

At the type locality, the Colomera meteorite, Colomera, Granada, Andalusia, Spain, fall in 1912, colomeraite was found as subhedral crystals, about 2 to 6 μm in size, closely associated with albite and K-feldspar, in a single silicate nodule. Associated minerals include albite, apatite, K-feldspar, kosmochlor, loveringite, merrillite, native iron, pyroxene group minerals, rutile, taenite and troilite (Mindat).
Colomeraite is a high-pressure and high-temperature pyroxene, probably formed from an alkali plagioclase-Ti-rich phase melt via impact mixing of metal and silicates under extremely reducing conditions (AM 111.7.1186-1191).
Colomeraite from the Colomera meteorite - Image

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