mineral

Blue Lace Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Hardness: 6.5-7 Mohs scale; Color: Pale blue with white or darker blue lace-like banding; Luster: Waxy to vitreous; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.60-2.65

Hardness: 6
Color: Pale blue with white or darker blue lace-like banding
Luster: Waxy to vitreous

Identified March 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from groundwater in the cavities of igneous rocks, particularly volcanic lavas. Most specimens originate from the Precambrian era, though deposit ages vary.

Uses & applications

Primarily used in jewelry (cabochons, beads), ornamental carvings, and as a popular specimen for gemstone collectors and holistic practices.

Geological facts

First discovered in Namibia by George Swanson in the 1960s. It is renowned for its calming appearance and the Tyndall effect, which causes the specific blue scattering of light within the silica structure.

Field identification & locations

Identify by its distinctive light blue color and delicate, wavy 'lace' banding. Commonly found in Namibia, South Africa, and occasionally Brazil. Collectors should look for translucency and high-contrast banding.

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