gemstone

Faceted quartz crystal sphere (likely rock crystal)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; colorless to smoky-clear, with vitreous luster and trigonal crystal structure. The image shows a cut/faceted sphere rather than a natural crystal, mounted in a metal holder; inclusions or internal reflections may imitate darker minerals.

Identified August 30, 2026More gemstone →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids and igneous pegmatites, commonly during Precambrian to younger geological events. This specimen has been shaped and faceted from natural quartz, possibly treated or assembled as décor.

Uses & applications

Used for ornamental objects, crystal spheres, jewelry, optical components, and electronics; this example is primarily decorative. Common faceted quartz spheres generally have modest collector value.

Geological facts

Quartz has no true cleavage and breaks with conchoidal fracture; its glassy appearance and strong internal reflections are diagnostic. It may be confused with lead glass or synthetic glass, especially when highly transparent and machine-cut.

Field identification & locations

Common sources include Brazil, Madagascar, the United States, and China. Field quartz is identified by hardness, hexagonal crystal habits, lack of cleavage, and ability to scratch ordinary glass; this mounted polished form requires provenance or testing for confirmation.