mineral
Blue Lace Agate
Microcrystalline Quartz (Chalcedony), SiO2
Hardness: 6.5-7 Mohs; Color: Light blue with white or darker blue banding; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Specific Gravity: 2.58–2.64
- Hardness
- 6
- Color
- Light blue with white or darker blue banding
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Light blue with white or darker blue banding; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Specific Gravity: 2.58–2.64
Formation & geological history
Secondary formation in volcanic rocks where silica-rich fluids fill cavities (vugs). Most famous specimens originate from the Karasburg region of Namibia, dating back to the Precambrian or younger volcanic events.
Uses & applications
Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular specimen for crystal collectors.
Geological facts
First discovered in the early 1960s by George Swanson in Namibia. It is a rare variety of chalcedony distinguished by its delicate, lace-like banding patterns.
Field identification & locations
Identified by its distinctive sky-blue color and wavy, white, or translucent bands. Found mainly in Namibia, but similar banded chalcedony occurs in South Africa and Romania.
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