mineral

Blue Lace Agate

Chalcedony (Silicon Dioxide, SiO2)

Hardness: 6.5-7 on Mohs scale. Color: Pale blue with white or darker blue banding. Luster: Waxy to vitreous. Crystal structure: Trigonal (microcrystalline). Cleavage: None. Specific gravity: 2.60-2.65.

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

Identified June 23, 2026More mineral →

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Physical properties

Formation & geological history

Forms through the deposition of silica from groundwater in the cavities of igneous rocks, particularly volcanic lavas. The banding occurs due to different concentrations of impurities during the cooling and crystallization process over thousands of years.

Uses & applications

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

Geological facts

Blue Lace Agate was first discovered in Namibia, which remains the primary source for high-quality specimens. It is technically a variety of banded chalcedony.

Field identification & locations

Identified by its distinctive sky-blue color and delicate, wavy white banding. In the field, look for a waxy luster and conchoidal fracture. It is commonly found in Namibia, South Africa, and parts of the United States.