metamorphic
Stichtite in Serpentinite (Atlantisite)
Mg6Cr2CO16(OH)16·4H2O in Mg3Si2O5(OH)4
Hardness: 1.5 to 2.5 for Stichtite, 2.5 to 5.5 for Serpentinite matrix. Color: Bright purple to magenta veins within yellowish-green or olive green serpentinite. Luster: Pearly, greasy, to waxy. Crystal Structure: Trigonal (stichtite), Monoclinic/Orthorhombic (serpentine).
- Hardness
- 1
- Luster
- Pearly, greasy, to waxy
Identified More metamorphic →
Explore Stichtite in Serpentinite (Atlantisite) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 1.5 to 2.5 for Stichtite, 2.5 to 5.5 for Serpentinite matrix. Color: Bright purple to magenta veins within yellowish-green or olive green serpentinite. Luster: Pearly, greasy, to waxy. Crystal Structure: Trigonal (stichtite), Monoclinic/Orthorhombic (serpentine).
Formation & geological history
Formed through the metamorphic alteration of chromium-rich ultramafic rocks (peridotite or serpentinite) under hydrothermal conditions. The chromium gives stichtite its characteristic rich purple color.
Uses & applications
Used predominantly as a gemstone in lapidary work, cut into polished cabochons, carved ornaments, and used in wire-wrapped or silver-set jewelry. Highly popular among rock and mineral collectors.
Geological facts
First discovered in 1910 in Zeehan, Tasmania, Australia, and named after Robert Carl Sticht, a mine manager. The trade name 'Atlantisite' specifically refers to high-grade specimens from the Stichtite Hill locality in Tasmania.
Field identification & locations
Identified by the distinct contrast of vibrant purple veins/patches within a green serpentine host rock. Primary sources include Tasmania (Australia), South Africa (Barberton district), and Canada. Collectors look for strong color contrast and solid polish without deep fractures.
More like this
