IMA mineral species

Hydrowoodwardite

🪶 Soft, Scratches Easily

(Cu₁-xAlx)(OH)₂[SO₄]x/₂ * nH₂O

Sulfate mineral.

Hydrowoodwardite specimen — Hydrowoodwardite - St Briccius Mine, Königswalde, Annaberg, Saxony, Germany.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness2

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💅🪙🍶🔪💎

Scratches with a fingernail.

Chemical formula	(Cu₁-xAlx)(OH)₂[SO₄]x/₂ * nH₂O
Elements	Cu, Al, O, H, S
Crystal system	—
Mohs hardness	2
Density	—
Streak	—
Color	—
IMA symbol	Hwwd
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

Hydrowoodwardite on Mindat.org
Wikidata item Q1640396 (source of this page's data – you can correct it there)