IMA mineral species

Berthierine

🪶 Soft, Scratches Easily

(Fe²⁺,Fe³⁺,Al)₃(Si,Al)₂O₅(OH)₄

Phyllosilicate mineral.

Berthierine specimen
Berthierine-163637.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness2.5
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💅🪙🍶🔪💎

Scratches with a fingernail.

Chemical formula(Fe²⁺,Fe³⁺,Al)₃(Si,Al)₂O₅(OH)₄
ElementsFe, Al, Si, O, H
Crystal system—
Mohs hardness2.5
Density—
Streak—
Color—
IMA symbolBrh
Nickel–Strunz class9.ED.15

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

Care & Handling

  • 🪶 Soft, Scratches Easily Mohs 2.5: softer than a steel knife, so it scratches easily. Store it apart from harder stones.