mineral

Quartz with green chlorite or epidote inclusions

Quartz (SiO₂), likely inclusion-bearing macrocrystalline quartz

AI-generated identification · may be incorrect

Milky to translucent quartz with a vitreous luster, irregular fracture, and no obvious cleavage; Mohs hardness 7, specific gravity about 2.65. The dark green patch is likely chlorite, epidote, or another mafic mineral inclusion, but the photograph cannot distinguish them reliably.

Identified August 27, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids in veins, cavities, and pegmatites, commonly alongside feldspar and mafic alteration minerals. The specimen’s precise age and host rock cannot be determined visually.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and construction; attractive included pieces are sold as mineral specimens or lapidary material.

Geological facts

Quartz is one of Earth’s most abundant minerals and has strong piezoelectric properties. Green inclusions can produce attractive garden-like or mossy patterns when polished.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch ordinary glass, and conchoidal fracture; quartz will not fizz in dilute acid. Common sources include Brazil, Madagascar, the Alps, and hydrothermal veins worldwide.