metamorphic
Banding Onyx Marble
Calcite / Travertine
AI-generated identification · may be incorrectHardness of 3 on Mohs scale, displays distinct parallel brown and white bands, vitreous to dull luster, trigonal crystal structure, perfect cleavage.
Identified More metamorphic →
Explore Banding Onyx Marble in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 3 on Mohs scale, displays distinct parallel brown and white bands, vitreous to dull luster, trigonal crystal structure, perfect cleavage.
Formation & geological history
Formed by the precipitation of carbonate minerals from solution in ground water, commonly in caves or hot springs.
Uses & applications
Used primarily for decorative objects, interior tiles, and carved ornaments.
Geological facts
Often commercially marketed as 'onyx' though it is mineralogically a travertine or banded calcite.
Field identification & locations
Identified by its softness, distinct banding, and strong effervescence when exposed to dilute hydrochloric acid.
More like this
