mineral

Sodalite beads

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

AI-generated identification · may be incorrect

Typically deep royal blue to gray-blue with white calcite veining; vitreous to greasy luster and hardness 5.5–6 Mohs. It has a cubic crystal structure but is usually massive and opaque, with uneven fracture and density around 2.2–2.4.

Identified August 7, 2026More mineral →

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Physical properties

Formation & geological history

Forms in silica-poor, sodium-rich igneous rocks such as nepheline syenite, commonly through late-stage magmatic or hydrothermal processes. The beads are polished and drilled, so their original geological age cannot be determined from the image.

Uses & applications

Used as an ornamental stone for beads, cabochons, carvings, and small decorative objects; it is less durable than quartz gemstones and is not typically used in construction.

Geological facts

The blue color comes from sulfur-related color centers and may fade with prolonged sunlight or heat. It is commonly confused with lapis lazuli, but lapis usually contains abundant golden pyrite and more calcite variation.

Field identification & locations

Identify it by its opaque blue body, occasional white veining, relatively moderate hardness, and lack of metallic pyrite sparkle; lapis lazuli is the main look-alike. Important sources include Canada, Brazil, Namibia, Russia, and Afghanistan.