Mineral

Stichtite (often found in Serpentinite)

Stichtite Mg6Cr2CO3(OH)16·4H2O

Hardness: 1.5-2.0 (Mohs scale); Color: Lilac, pinkish-purple to deep purple; Luster: Waxy to pearly; Crystal structure: Trigonal; Cleavage: Basal; Specific gravity: 2.16.

Hardness: 1
Color: Lilac, pinkish-purple to deep purple
Luster: Waxy to pearly

Identified March 25, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 1.5-2.0 (Mohs scale); Color: Lilac, pinkish-purple to deep purple; Luster: Waxy to pearly; Crystal structure: Trigonal; Cleavage: Basal; Specific gravity: 2.16.

Formation & geological history

Formed as an alteration product of chromite in serpentine rocks. It is typically found in ultramafic rocks and is often associated with the Archean Eon, though its formation is post-depositional through hydrothermal alteration.

Uses & applications

Predominantly used as a decorative stone, unique carvings, and semi-precious gemstones for jewelry (often cabochons). It is a highly sought-after specimen for mineral collectors.

Geological facts

First discovered in 1910 in Tasmania, Australia, and named after Robert Carl Sticht, the manager of a local copper mine. It is distinctive for its vibrant purple color amidst green serpentine, a combination often marketed as 'Atlantisite'.

Field identification & locations

Identify by its extreme softness (can be scratched by a fingernail) and its distinct purple/pink hue. Commonly found in Tasmania (Australia), South Africa (Barberton), and Canada (Quebec). Look for purple patches within green host rock.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral