Onyx Marble
Image: Linda Spashett <a href="//commons.wikimedia.org/wiki/User:Storye_book" title="User:Storye book">Storye book</a> (CC BY 3.0)
Mineral NameOnyx Marble
Chemical FormulaCaCO3
Mohs Hardness3
Crystal Systemtrigonal
Lustervitreous
Streak Colorwhite
Cleavageperfect rhombohedral
Fractureconchoidal
Specific Gravity2.71
Colorswhite, yellow, pink
Transparencytranslucent
Type LocalityWorldwide
Mineral GroupCarbonates
Usesdecorative stone, sculpture, architectural material
Raritycommon
Description
A large, polished slab of banded, translucent yellowish-white and pinkish material, displaying distinct parallel layers.
Geological Context
Onyx marble is a banded form of calcite that forms from the precipitation of calcium carbonate from mineral-rich waters, typically in caves as speleothems or around hot springs.
