mineral

Tumbled Carnelian and Quartz Mix

Silicon Dioxide (SiO2) with iron oxide impurities

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Red, orange, green, white; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture)

Hardness: 6
Color: Red, orange, green, white
Luster: Vitreous to waxy

Identified May 19, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Red, orange, green, white; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture)

Formation & geological history

Formed via silica-rich groundwater percolating through volcanic rock cavities (vugs) or sedimentary formations. These specimens are mechanically tumbled to achieve a smooth finish.

Uses & applications

Used primarily for lapidary arts, jewelry (beads, cabochons), decor, and as a popular item for gemstone collectors and metaphysical enthusiasts.

Geological facts

Carnelian is a variety of chalcedony that gets its color from iron oxide; it was highly prized in ancient Rome for use in signet rings because hot wax does not stick to it.

Field identification & locations

Identify by the translucency and waxy luster typical of chalcedony. Common in gravel beds or near volcanic outcrops in places like Brazil, India, and Madagascar.