mineral

Blue Lace Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Hardness: 6.5-7 (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 March 15, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (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

Formation & geological history

Formed through the deposition of silica from groundwater in the cavities of igneous rocks, primarily volcanic lavas. Most specimens are from the Cenozoic era, though the process can occur in rocks of various ages.

Uses & applications

Primarily used for lapidary arts including jewelry (cabochons, beads), decorative carvings, and as a popular specimen for metaphysical and mineral collectors.

Geological facts

First discovered in Namibia by George Swanson in the 1960s. It is considered one of the rarest and most sought-after varieties of agate due to its delicate, lace-like banding patterns and soft blue hue.

Field identification & locations

Identify in the field by its distinct light blue-and-white parallel banding and translucent edges. It has a conchoidal fracture. Notable locations include Namibia (the primary source), South Africa, and parts of Brazil.

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