Onyx Marble look-alikes
Calcite (variety of marble)
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Open the appSeveral rocks and minerals can be confused with Onyx Marble. Below are documented look-alikes and the features that tell them apart. Never rely on a single feature. Always check multiple properties.
Similar rocks to compare
True Onyx
Chalcedony (variety of quartz)
Also known as: Sardonyx (if bands are white and reddish-brown)
Marble
Metamorphosed Limestone (primarily Calcite)
Also known as: Crystalline Limestone
Travertine
Calcite (chemically precipitated)
Also known as: Tufa (porous variety)
Alabaster (Gypsum)
Gypsum (CaSO4·2H2O)
Also known as: Gypsum Alabaster
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