mineral

Quartz Pebble with Epidote / Chlorite Inclusions

Silicon Dioxide (SiO2) with Epidote/Chlorite inclusions

AI-generated identification · may be incorrect

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

Identified July 27, 2026More mineral →

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Physical properties

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.