mineral

Blue Lace Agate

Silicon Dioxide (SiO2)

Hardness: 6.5–7 (Mohs scale), Color: Pale blue with white or darker blue bands, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None, Specific Gravity: 2.60–2.65

Hardness: 6

Identified April 10, 2026More mineral →

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Physical properties

Formation & geological history

Formed in volcanic environments where silica-rich groundwater fills cavities (vesicles) in lava. Over time, layers of microcrystalline quartz deposit, creating distinctive banding. It is primarily associated with the Tertiary period.

Uses & applications

Used extensively in jewelry as cabochons, beads, and carvings. It is also used in decorative items and by mineral collectors for its unique aesthetics.

Geological facts

First discovered in Namibia in the 1960s. Unlike most other agates that are found globally, the highest quality 'Blue Lace' is relatively rare and associated with a specific mine in Namibia.

Field identification & locations

Identify in the field by its characteristic light blue 'lace-like' banding and high hardness (it cannot be scratched by a steel knife). Commonly found in South Africa and Namibia.