IMA mineral species

Woodwardite

🪶 Soft, Scratches Easily

(Cu₁-ₓAlₓ)(SO₄)ₓ/₂(OH)₂ · nH₂O (x < 0.5, n < 3x/2)

Sulfate mineral.

Woodwardite specimen — Woodwardite-237529.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness2

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💅🪙🍶🔪💎

Scratches with a fingernail.

Chemical formula	(Cu₁-ₓAlₓ)(SO₄)ₓ/₂(OH)₂ · nH₂O (x < 0.5, n < 3x/2)
Elements	Cu, Al, S, O, H
Crystal system	Hexagonal
Mohs hardness	2
Density	—
Streak	—
Color	—
IMA symbol	Wwd
Nickel–Strunz class	7.DD.35

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

Care & Handling

🪶 Soft, Scratches Easily Mohs 2: softer than a steel knife, so it scratches easily. Store it apart from harder stones.

Learn more

Woodwardite on Mindat.org
Wikidata item Q425563 (source of this page's data – you can correct it there)