gemstone

Pink opal and dendritic agate bead bracelet/necklace

Common opal (hydrated amorphous silica, SiO₂·nH₂O) with dendritic agate/chalcedony (microcrystalline quartz, SiO₂)

AI-generated identification · may be incorrect

Polished spherical beads, mostly pale pink opaque opal with gray-white chalcedony beads containing black manganese-oxide dendrites. Opal hardness is about 5.5–6.5 Mohs; chalcedony is 6.5–7, with vitreous-to-waxy luster and no cleavage.

Identified September 17, 2026More gemstone →

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At a glance

Common name: Pink opal and dendritic agate bead bracelet/necklace
Scientific name: Common opal (hydrated amorphous silica, SiO₂·nH₂O) with dendritic agate/chalcedony (microcrystalline quartz, SiO₂)
Category: gemstone
Identified: September 17, 2026
Method: Standard

AI Estimated Value

Approximately $15–$80 for a common finished strand or bracelet; fine natural material may reach $100–$200.

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

Opal forms when silica-rich groundwater deposits hydrated silica in cavities and fractures; chalcedony forms from microcrystalline silica, while dendrites develop from mineral-rich fluids. These are generally young, commonly Cenozoic deposits, often from Peru, Mexico, Madagascar, or Indonesia.

Uses & applications

Used primarily in jewelry and ornamental beads; pink opal is valued for its pastel color, while dendritic agate is prized for natural patterning.

Geological facts

The black branching markings are mineral dendrites, not fossils or biological inclusions. Opal may dehydrate, craze, or scratch more readily than quartz.

Field identification & locations

Identify by low-to-moderate hardness, opaque pastel pink color, waxy luster, and branching inclusions in the gray beads; avoid prolonged heat, chemicals, and ultrasonic cleaning.