gemstone

Golden-brown rutilated quartz

Quartz (SiO₂) with rutile inclusions (TiO₂)

AI-generated identification · may be incorrect

Mohs hardness 7; transparent to translucent, vitreous luster, typically brown-gold with needlelike metallic rutile inclusions. Quartz is trigonal and has no cleavage, with conchoidal fracture; specific gravity about 2.65.

Identified September 8, 2026More gemstone →

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Physical properties

Formation & geological history

Forms when rutile needles crystallize within quartz in hydrothermal veins or pegmatites, commonly during late-stage mineral growth. The specimen appears tumbled and polished rather than naturally fractured.

Uses & applications

Used for cabochons, beads, carvings, and collectible gemstone specimens; attractive chatoyant or densely included pieces are used in jewelry. Value depends strongly on clarity, color, inclusion pattern, and polish.

Geological facts

Rutile inclusions can be golden, reddish, or silvery and may form starbursts or crossing needles. The golden-brown appearance may also overlap with included quartz varieties such as sagenite.

Field identification & locations

Identify by glassy luster, quartz-like hardness, and visible needle-shaped inclusions; it should scratch window glass but not be scratched by a steel knife. Common sources include Brazil, Madagascar, and rutile-bearing Alpine or hydrothermal deposits.