gemstone

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

AI-generated identification · may be incorrect

The blue bead is opaque, ultramarine with possible pyrite flecks; lapis lazuli has Mohs hardness 5–5.5 and vitreous-to-dull luster. The green-blue heart is translucent to opaque, waxy, and approximately Mohs 6.5–7; the silver-colored setting is human-made jewelry.

Identified August 7, 2026More gemstone →

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At a glance

Common name: Lapis lazuli and green-blue chalcedony jewelry
Scientific name: Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)
Category: gemstone
Identified: August 7, 2026
Method: Standard

AI Estimated Value

Approximately $10–$50 for common costume jewelry; $50–$150 or more if the beads are high-quality natural lapis and chrysoprase with precious-metal components.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Lapis lazuli forms by contact metamorphism of limestone, notably in Afghanistan, while chalcedony forms from silica-rich groundwater filling cavities and fractures. These are generally ancient geological materials, though the jewelry’s manufacturing age cannot be determined.

Uses & applications

Used for beads, carvings, ornaments, and historically ultramarine pigment; chalcedony varieties are popular in jewelry. The metal bracelet and chain are decorative components rather than geological material.

Geological facts

Lapis lazuli is a rock rather than a single mineral, and pyrite inclusions can help distinguish it from dyed blue stones. Green chalcedony may be naturally colored or treated, so exact identification requires testing.

Field identification & locations

Check the blue bead for a rich blue body with calcite veining or metallic pyrite, and test hardness cautiously on an inconspicuous area; glass and dyed imitations are common. Likely sources include Afghanistan for lapis and Brazil, Australia, India, or Madagascar for chalcedony.