mineral

Banded Agate (specifically Lace Agate type)

Silicon Dioxide (SiO2)

Hardness: 6.5-7 on Mohs scale; Color: White and reddish-orange/peach; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.64

Hardness: 6
Color: White and reddish-orange/peach
Luster: Waxy to vitreous

Identified June 3, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: White and reddish-orange/peach; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.64

Formation & geological history

Formed in cavities in volcanic rocks or ancient lavas, where silica-rich groundwater deposited layers over time. This specimen is a microcrystalline variety of quartz.

Uses & applications

Primarily used for semi-precious jewelry, decorative carvings, tumbling for collectors, and healing stone practices.

Geological facts

The name 'Agate' comes from the Achates River in Sicily where they were first found. Its distinct bands are caused by rhythmic crystallization of silica.

Field identification & locations

Identify in the field by its waxy luster, hardness (will scratch glass), and characteristic concentric or lace-like banding. Commonly found in Brazil, India, and the USA (notably around the Lake Superior region).

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