Stichtite

Stichtite is a natural, very soft, rose-pink to purple mineral, a hydrated magnesium-chromium carbonate-hydroxide of the hydrotalcite group, named after Robert Carl Sticht of the Mount Lyell Mining and Railway Company in Tasmania. It forms in altered serpentinites with chromite, and is often found mixed with green serpentine.

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Full material guide
Material facts

What the material is, where it comes from or how it is made, identification and care, from the cited sources.

Properties

Nature Natural mineral (hydrotalcite group)
Chemical formula Mg₆Cr³⁺₂(OH)₁₆(CO₃)·4H₂O
Color Rose-pink to lilac and purple
Crystal system Trigonal; massive, foliated, fibrous, lamellar or scaly
Mohs hardness 1.5 to 2 (IGS: up to 2.5)
Specific gravity 2.16 to 2.22
Refractive index 1.516 to 1.545
Luster Waxy, greasy or pearly; greasy feel
Cleavage Perfect in one direction; flexible

Origins & sources

Stichtite occurs in highly altered serpentinites and chromitites, usually with chromite, as irregular masses, veins and blebs in serpentine. The type locality is Stichtite Hill in the Dundas mineral field, Tasmania, Australia, where it is mixed with green serpentine. Other localities include Black Lake in Quebec, Canada, Transvaal in South Africa, and Algeria.

Identification

Stichtite is recognised by its pink to purple colour, very low hardness, waxy to greasy lustre and greasy feel, and its usual association with green serpentine; it is not facetable and is cut as cabochons or carved. Purple stichtite mixed with green serpentine is a serpentinite rock that has been traded as "Atlantisite", which Mindat calls an unnecessary trade name; it is a rock, not a separate mineral. Stichtite somewhat resembles canasite, a pink granular material from the former USSR.

Care

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History & culture

History

Stichtite was first published in 1910 (W. F. Petterd, Catalogue of the Minerals of Tasmania) and is named after Robert Carl Sticht (1856–1922), born in Hoboken, New Jersey, USA, who was general manager of the Mount Lyell Mining and Railway Company in Queenstown, Tasmania.

Cultural meanings

The Japanese retailer Pascle says stichtite is traditionally said to be a stone of peace that helps its wearer build good relationships with family and friends. This is a retailer belief, not a tested property.

Traditional beliefs

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Sources

Collected Oct 23, 2026