metamorphic
Tumbled pink brecciated marble or quartzite
Calcite-rich marble, likely with quartz veins; exact identification requires testing
AI-generated identification · may be incorrectPink-red, white-veined, fine-grained, and polished with a dull-to-waxy luster. If marble, hardness is Mohs 3–4 and it fizzes with dilute hydrochloric acid; quartzite is harder, about 7, and does not fizz.
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Physical properties
Pink-red, white-veined, fine-grained, and polished with a dull-to-waxy luster. If marble, hardness is Mohs 3–4 and it fizzes with dilute hydrochloric acid; quartzite is harder, about 7, and does not fizz.
Formation & geological history
Formed when limestone recrystallized under heat and pressure, with later mineral veining or brecciation; its age cannot be determined from the image. Common in metamorphic mountain belts worldwide.
Uses & applications
Used as a decorative tumbled stone, ornamental aggregate, carving material, and—when sound and large enough—as dimension stone; usually modest collector value.
Geological facts
The salmon-pink color may come from iron-bearing minerals, while the white lines are likely calcite or quartz veins. Tumbling has rounded and smoothed the original surfaces.
Field identification & locations
Test hardness against glass and inspect reaction to dilute acid: scratching glass favors quartzite, while vigorous fizzing identifies calcitic marble. Common sources include India, Brazil, Italy, and the United States.
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