metamorphic

Polished ruby-in-zoisite sphere (anyolite)

Ruby-bearing zoisite, commonly called anyolite; zoisite Ca₂Al₃(SiO₄)₃(OH) with corundum ruby Al₂O₃

AI-generated identification · may be incorrect

A polished, mottled green-gray and pink-purple specimen with vitreous to pearly luster. Zoisite is Mohs 6–7; ruby is 9; the minerals have different crystal structures and the sphere’s specific gravity varies with composition. The photograph alone cannot confirm the exact mineral mix.

Identified September 27, 2026More metamorphic →

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At a glance

Common name: Polished ruby-in-zoisite sphere (anyolite)
Scientific name: Ruby-bearing zoisite, commonly called anyolite; zoisite Ca₂Al₃(SiO₄)₃(OH) with corundum ruby Al₂O₃
Category: metamorphic
Identified: September 27, 2026
Method: Standard

AI Estimated Value

Approximately $15–$80 for a small polished sphere, depending on size, color contrast, and workmanship.

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

Forms through metamorphism and fluid activity that bring corundum and zoisite together in altered mafic rocks; famous material comes from Tanzania’s Longido district, associated with Proterozoic metamorphic geology.

Uses & applications

Mostly carved into spheres, beads, and decorative objects; attractive ruby-bearing pieces are collected, while this material is generally not used as high-grade ruby jewelry.

Geological facts

“Anyolite” derives from the Maasai word for green. Its contrasting green zoisite and pink-red ruby patches make polished pieces distinctive.

Field identification & locations

Look for visible pink-to-red corundum patches intergrown with green zoisite; this sphere appears gray-green with pink-purple areas, so identification is tentative from the image. Commonly sourced from Tanzania.