metamorphic
Verde Antique Marble (Serpentinite)
Serpentinite (composed mainly of Serpentine group minerals, Mg3Si2O5(OH)4)
Hardness: 3–6 (Mohs scale), Color: Dark green with white/light green veining, Luster: Greasy to waxy when polished, Crystal structure: Monoclinic, Specific gravity: 2.5–2.6
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Physical properties
Hardness: 3–6 (Mohs scale), Color: Dark green with white/light green veining, Luster: Greasy to waxy when polished, Crystal structure: Monoclinic, Specific gravity: 2.5–2.6
Formation & geological history
Formed through serpentinization, a low-temperature metamorphic process where ultramafic rocks from the Earth's mantle are hydrated by water. Often found in ophiolite complexes representing ancient ocean floor.
Uses & applications
Extensively used as a decorative building stone for countertops, floor tiles, columns, and interior wall cladding. It is also popular for ornamental carvings.
Geological facts
Despite being called 'marble' in the stone industry due to its ability to take a high polish, it is geologically a serpentinite. Iconic examples are found in many historic European churches and public buildings in the USA.
Field identification & locations
Identify by its distinctive mottled green color and white calcite or magnesite veins. It is commonly found in tectonic plate boundaries and mountain belts like the Appalachians or the Alps.
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