mineral

Polished white quartz heart

Milky quartz (SiO₂), possibly trade-labeled white or rainbow moonstone if adularescence is genuine

AI-generated identification · may be incorrect

Hardness 7 (quartz) or 6–6.5 (moonstone); white to translucent, vitreous-to-pearly luster, and irregular internal veils/fractures. The heart is cut and polished, obscuring natural crystal form and cleavage.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in igneous, metamorphic, and hydrothermal environments over a wide range of geological ages; moonstone is potassium feldspar formed mainly in granitic pegmatites. The visible pattern is likely inclusions or healed fractures, with a small surface sheen possibly from polishing.

Uses & applications

Primarily a decorative, metaphysical, and gift item; quartz is also used in glass, electronics, abrasives, and engineered stone. Comparable polished hearts are inexpensive collector specimens.

Geological facts

Quartz is much harder than glass and commonly shows conchoidal fracture, while feldspar has two cleavages and can show blue-white adularescence. A strong moving glow favors moonstone; uniform cloudy translucence favors milky quartz.

Field identification & locations

Common sources include Brazil, Madagascar, India, and the United States. Test discreetly with hardness or refractive-index methods; avoid scratching the polished face.