mineral

Blue Lace Agate

Silicon Dioxide (SiO₂), a variety of Chalcedony

Hardness: 6.5-7 (Mohs scale); Color: Pale blue with white/lavender bands; Luster: Vitreous to waxy; Crystal Structure: Trigonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.60–2.65

Hardness: 6
Color: Pale blue with white/lavender bands
Luster: Vitreous to waxy

Identified March 28, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Pale blue with white/lavender bands; Luster: Vitreous to waxy; Crystal Structure: Trigonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.60–2.65

Formation & geological history

Formed through the deposition of silica from groundwater in the cavities of igneous rocks such as basalt. Most specimens are sourced from Namibia and date back to the Precambrian or Tertiary periods depending on the host rock environment.

Uses & applications

Primarily used in jewelry (cabochons, beads), lapidary arts, ornamental carvings, and as a popular specimen for mineral collectors and metaphysical practitioners.

Geological facts

First discovered by George Swanson in South-West Africa in the mid-20th century. It is known for its distinct 'lace' patterns which are formed by extremely rhythmic crystallizations of chalcedony and quartz.

Field identification & locations

Identify in the field by its distinct pale blue color and thin, wavy parallel bands. Common locations include Namibia, South Africa, and Brazil. Collectors should look for high translucency and sharp, clear banding patterns.

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