mineral/igneous
Quartz and Unakite
SiO2 (Quartz) / Epidote, Pink Orthoclase, Quartz (Unakite)
AI-generated identification · may be incorrectQuartz: Hardness 7, yellow/orange/clear (iron stained), vitreous luster. Unakite: Hardness 6-7, mottled pink and green, opaque.
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Physical properties
Quartz: Hardness 7, yellow/orange/clear (iron stained), vitreous luster. Unakite: Hardness 6-7, mottled pink and green, opaque.
Formation & geological history
Quartz forms in igneous, metamorphic, and sedimentary rocks. Unakite is an altered granite formed by hydrothermal activity where plagioclase is replaced by epidote.
Uses & applications
Used in lapidary, tumbling, and as decorative stones.
Geological facts
Unakite is named after the Unaka range of mountains in North Carolina where it was first discovered.
Field identification & locations
Identifiable by color and hardness. Quartz is common globally; Unakite is found in the US, South Africa, Sierra Leone, and Brazil. Great for tumbling.
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