mineral

Blue Lace Agate

Silicon Dioxide (SiO2) with Chalcedony structure

Hardness: 6.5-7 on Mohs scale. Color: Pale blue with white or darker blue bands. Luster: Vitreous to waxy. Crystal Structure: Trigonally microcrystalline. Cleavage: None. Specific Gravity: 2.60 to 2.65.

Hardness: 6
Color: Pale blue with white or darker blue bands
Luster: Vitreous to waxy

Identified June 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed in cavities of volcanic rocks through the deposition of silica from groundwater. The characteristic bands form as layers of chalcedony fill the voids over thousands of years; predominantly found in Cenozoic deposits.

Uses & applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular specimen for crystal healing and metaphysical collecting.

Geological facts

First discovered in Namibia, which remains the primary source for high-quality material. The blue color is due to the Rayleigh scattering of light in the microcrystalline structure rather than a specific chemical pigment.

Field identification & locations

Identify by its distinct concentric or wavy banding of light blue and white. It is commonly found in Namibia, South Africa, and parts of Brazil. Field identification relies on hardness and the lack of cleavage common in other stones.

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