Atlantasite with Amethyst Sterling Silver PendantTwo minerals sharing a single stoneolive serpentine shot through with purple Stichtite. Atlantisite is the trade name for the combination of Serpentine and Stichtite found together in situalso called Tasmanite after Tasmania, where the first notable material emerged. Serpentine is a magnesium silicate formed by the hydrothermal alteration of ultramafic rock; Stichtite is a chromium bearing carbonate that grows in the same geological environment,