metamorphic
Stichtite in Serpentine (Atlantisite)
Mg6Cr2CO3(OH)16·4H2O (Stichtite) within Mg3Si2O5(OH)4 (Serpentine)
Hardness: 2-4 (Mohs scale), Color: Vivid purple to lilac spots in a green or yellowish-green matrix, Luster: Waxy to pearly, Crystal structure: Hexagonal/Trigonal (Stichtite) and Monoclinic (Serpentine), Cleavage: Perfect, Specific gravity: 2.1 - 2.6.
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 2-4 (Mohs scale), Color: Vivid purple to lilac spots in a green or yellowish-green matrix, Luster: Waxy to pearly, Crystal structure: Hexagonal/Trigonal (Stichtite) and Monoclinic (Serpentine), Cleavage: Perfect, Specific gravity: 2.1 - 2.6.
Formation & geological history
Formed through the hydro-thermal alteration of chromium-rich ultramafic rocks (serpentinization). This specific combination occurs in Precambrian aged rocks, often within Ophiolite complexes.
Uses & applications
Primarily used as a lapidary material for cabochons, beads, and decorative carvings; also highly valued in the metaphysical and gemstone collecting communities.
Geological facts
Stichtite was first discovered in 1910 in Tasmania, Australia, and named after Robert Carl Sticht, the manager of a local copper mine. The trade name 'Atlantisite' was coined by Gerald Pauley for the specific material found at Stichtite Hill in Tasmania.
Field identification & locations
Identify by its unique 'dalmatian-like' purple spots on a green base; often feels greasy or soapy to the touch. It is found in rare locations like Stichtite Hill (Tasmania), South Africa, and Canada. Collectors should look for vibrant purple saturation.
More like this
