
right|thumb|Serpentinite from the Maurienne valley, [[Savoie, French Alps]] right|thumb|Sample of serpentinite from the Golden Gate National Recreation Area, California, United States thumb|Chromite|Chromitic serpentinite ( across), [[Styria Province, Austria. Protolith was a Proterozoic-Early Paleozoic upper mantle dunite peridotite that has been multiply metamorphosed during the Devonian, Permian, and Mesozoic.]] thumb|Tightly folded serpentinite from the Tux Alps, [[Austria. Closeup view about .]]
right|thumb|Serpentinite from the Maurienne valley, [[Savoie, French Alps]] right|thumb|Sample of serpentinite from the Golden Gate National Recreation Area, California, United States thumb|Chromite|Chromitic serpentinite ( across), [[Styria Province, Austria. Protolith was a Proterozoic-Early Paleozoic upper mantle dunite peridotite that has been multiply metamorphosed during the Devonian, Permian, and Mesozoic.]] thumb|Tightly folded serpentinite from the Tux Alps, [[Austria. Closeup view about .]]
Serpentinite is a metamorphic rock composed predominantly of serpentine group minerals formed by serpentinization of mafic or ultramafic rocks. The ancient origin of the name is uncertain; it may be from the similarity of its texture or color to snake skin. Greek pharmacologist Dioscorides (AD 50) recommended this rock to prevent snakebite.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).