mineral

Blue Lace Agate

Chalcedony (Silicon Dioxide, SiO2)

Hardness: 6.5–7 on Mohs scale; Color: Light blue with white or darker blue banding; Luster: Waxy to vitreous; Crystal Structure: Trigonal (cryptocrystalline); Cleavage: None; Specific Gravity: 2.60–2.65.

Hardness: 6
Color: Light blue with white or darker blue banding
Luster: Waxy to vitreous

Identified April 4, 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. Most famous deposits are found in Namibia, dating back to the Precambrian era.

Uses & applications

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

Geological facts

First discovered by George Swanson in Namibia in the 1960s. It is a variety of chalcedony uniquely characterized by its delicate, lace-like banding patterns.

Field identification & locations

Identify by its distinct light blue color and fine, wavy white bands. It is most commonly found in Namibia, though smaller deposits exist in Brazil and the USA. Collectors look for high contrast in the lace patterns.