mineral

Banded Carnelian

Carnelian (Silicon Dioxide / SiO2)

Hardness: 6.5-7 Mohs; Color: Reddish-orange with white or cream banding; Luster: Vitreous to waxy; Crystal structure: Trigonal (cryptocrystalline); Specific gravity: 2.58-2.64

Hardness: 6
Color: Reddish-orange with white or cream banding
Luster: Vitreous to waxy

Identified June 6, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Reddish-orange with white or cream banding; Luster: Vitreous to waxy; Crystal structure: Trigonal (cryptocrystalline); Specific gravity: 2.58-2.64

Formation & geological history

Formed through the deposition of silica in cavities of volcanic rocks. The red coloring is caused by iron oxide impurities. It belongs to the chalcedony family, specifically the cryptocrystalline variety of quartz.

Uses & applications

Mostly used in jewelry (beads, cabochons, intaglios), spiritual or metaphysical collecting, and small ornamental carvings.

Geological facts

Carnelian has been used for over 4,500 years; ancient Romans used it for signet rings because hot wax does not stick to it. It was also highy prized in Ancient Egypt as the 'setting sun.'

Field identification & locations

Identify by its translucent reddish-orange body and distinct parallel banding. Common in Brazil, India, Uruguay, and Madagascar. In the field, look for smooth, waxy nodules in basaltic riverbeds.