mineral
Quartz Pebble with Epidote / Chlorite Inclusions
Silicon Dioxide (SiO2) with Epidote/Chlorite inclusions
Hardness: 7 on the Mohs scale (quartz host). Color: Translucent grayish-white to pale yellowish-green with dark green inclusions. Luster: Vitreous to waxy when wet. Crystal System: Hexagonal (trigonal). Cleavage: None, exhibits conchoidal fracture.
- Hardness
- 7 on the Mohs scale (quartz host)
- Luster
- Vitreous to waxy when wet
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Physical properties
Hardness: 7 on the Mohs scale (quartz host). Color: Translucent grayish-white to pale yellowish-green with dark green inclusions. Luster: Vitreous to waxy when wet. Crystal System: Hexagonal (trigonal). Cleavage: None, exhibits conchoidal fracture.
Formation & geological history
Formed in hydrothermally active metamorphic or igneous environments where quartz crystallized around existing mineral fibers of chlorite or epidote, subsequently smoothed by water erosion in stream or beach beds.
Uses & applications
Commonly collected as river pebbles, lapidary material for tumbling, cabochons, and decorative mineral specimens.
Geological facts
Stream-rounded pebbles containing green inclusions like chlorite or epidote are often referred to as 'moss agate' or 'inclusion quartz' by amateur collectors, though technically they are macrocrystalline quartz with mineral inclusions.
Field identification & locations
Look for a glassy, translucent quartz body containing distinct dark green to brownish fibers or specks that can scratch glass easily (Mohs hardness 7). Commonly found in riverbeds, gravel bars, and alluvial deposits worldwide.
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