mineral
Blue Lace Agate
Silicon Dioxide (SiO2)
Hardness: 6.5-7.0 (Mohs scale), Color: Pale blue with white or darker blue banding, Luster: Vitreous to waxy, Crystal structure: Trigonal (cryptocrystalline), Cleavage: None, Specific gravity: 2.58-2.64
- Hardness
- 6
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Physical properties
Hardness: 6.5-7.0 (Mohs scale), Color: Pale blue with white or darker blue banding, Luster: Vitreous to waxy, Crystal structure: Trigonal (cryptocrystalline), Cleavage: None, Specific gravity: 2.58-2.64
Formation & geological history
Formed in volcanic rock cavities through the deposition of silica from groundwater. The blue color is due to the scattering of light by minute inclusions, a phenomenon known as the Tyndall effect.
Uses & applications
Primarily used in jewelry making, lapidary arts, and as a decorative collector's stone. It is often carved into cabochons, beads, or decorative figurines.
Geological facts
Blue Lace Agate was first discovered in Namibia in the 1960s. It is technically a variety of chalcedony. Unlike many agates which are dyed, most blue lace agate displays its delicate blue color naturally.
Field identification & locations
Identify by its distinct light blue hue and fine, wavy white banding. It is most famously found in Namibia, but deposits also exist in South Africa, Brazil, and parts of the United States.
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