mineral

Blue lace agate beads

Chalcedony (microcrystalline quartz), SiO₂, with blue-gray banding

AI-generated identification · may be incorrect

Hardness 6.5–7 Mohs; translucent white to pale blue with delicate curved bands, waxy to vitreous luster, cryptocrystalline structure, and no visible cleavage. These are polished, carved beads rather than a natural unworked specimen.

Identified August 18, 2026More mineral →

Explore Blue lace agate beads in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms when silica-rich groundwater fills cavities in volcanic rocks, depositing layered chalcedony over long periods, commonly during the Cenozoic. Blue lace agate is especially associated with southern Africa, notably Namibia and South Africa.

Uses & applications

Used for beads, cabochons, ornamental objects, and lapidary jewelry; it has little industrial value compared with ordinary quartz.

Geological facts

The blue color and banding result from microscopic mineral impurities and rhythmic silica deposition. Fine, strongly banded material is more desirable than pale or weakly patterned pieces.

Field identification & locations

Identify by its very fine lace-like blue-white bands, waxy polish, translucency, and quartz hardness; glass usually lacks natural banding and may show bubbles. Typical value is about $10–$50 for a bead strand, or $2–$15 per bead depending on quality and size.