Blue Chalcedony (Blue Lace Agate variety)

Physical Properties

Hardness: 6.5-7 (Mohs scale); Color: Light blue, lavender, grayish-white with banded patterns; Luster: Waxy to vitreous; Crystal Structure: Trigonal (microcrystalline); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.6-2.64

Formation & Geological History

Formed through the deposition of silica-rich groundwater in cavities of igneous rocks, particularly volcanic basalts. This specimen has been cut and polished into a tower or obelisk shape.

Uses & Applications

Primarily used for ornamental purposes, lapidary arts, jewelry, and by collectors of metaphysical crystals.

Geological Facts

Blue Lace Agate is specifically known for its delicate, lace-like banding. Though technically a variety of chalcedony, it is highly sought after for its calming color. Larger geological deposits are found in Namibia and South Africa.

Field Identification & Locations

Identify in the field by its translucency, waxy luster, and lack of visible crystals. It is much harder than fluorite or calcite. Commonly found in volcanic regions as nodules or cavity fillings.

Identified on: 4/29/2026

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