IMA mineral species

Prosopite

🪶 Soft, Scratches Easily

CaAl₂(F,OH)₈

Aluminofluoride mineral.

Prosopite specimen
Prosopite-tn17a.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness4.5
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💅🪙🍶🔪💎

A steel knife scratches it, it won't scratch glass.

Chemical formulaCaAl₂(F,OH)₈
ElementsCa, Al, F, O, H
Crystal systemMonoclinic
Mohs hardness4.5
Density—
Streak—
Color—
IMA symbolPsp
Nickel–Strunz class3.CD.10

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

Care & Handling

  • 🪶 Soft, Scratches Easily Mohs 4.5: softer than a steel knife, so it scratches easily. Store it apart from harder stones.