mineral
Blue Lace Agate
Chalcedony (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness: 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
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Physical properties
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.
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.
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