IMA mineral species ⚠ Handle with care

Tremolite

☐Ca₂Mg₅Si₈O₂₂(OH)₂

Ca-amphibole, double chain inosilicate mineral.

Yellow Green Purple Pink Gray White & Clear

Tremolite specimen — Tremolite Campolungo.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula	☐Ca₂Mg₅Si₈O₂₂(OH)₂
Elements	Ca, Mg, Si, O, H
Crystal system	Monoclinic
Mohs hardness	—
Density	—
Streak	white
Color	—
IMA symbol	Tr
Nickel–Strunz class	9.DE.10

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

⚠ Handle With Care Moderate caution

😷 Dust / fibre inhalation hazard🚫 Don't make water elixirs

Why: Fibrous (asbestiform) tremolite is regulated as asbestos. Massive or crystalline tremolite is not fibrous, but it can occur together with fibres.

Safe handling: Handle it as a solid specimen only. Never cut, sand, polish or grind it. If you must clean it, do so wet, wear a P100 / FFP3 mask and gloves, and keep it away from children and pets.

Sources: Wikipedia: Tremolite · ATSDR ToxFAQs: Asbestos · USGS: Asbestos & other natural mineral fibres. General safety information only, not medical advice. More on safe handling.

Varieties & related stones

Hexagonite

Learn more

Tremolite on Mindat.org
Wikipedia article
Wikidata item Q423051 (source of this page's data – you can correct it there)