Onyx Marble look-alikes
Calcite (banded variety)
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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 (SiO2)
Also known as: Black Onyx, Sardonyx
Travertine
Calcite (CaCO3)
Also known as: Tufa
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
Also known as: Metamorphic Limestone
Alabaster (Gypsum variety)
Gypsum (CaSO4·2H2O)
Also known as: Gypsum Alabaster
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