gemstone

Blue topaz-style pendant gemstone

Likely blue topaz (Al₂SiO₄(F,OH)₂); the image cannot confirm the stone or whether it is natural or synthetic.

AI-generated identification · may be incorrect

Faceted pear-shaped blue stone in a metal setting. If topaz: Mohs hardness 8, vitreous luster, orthorhombic crystals, and perfect basal cleavage; color is often produced by treatment.

Identified October 3, 2026More gemstone →

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Physical properties

Faceted pear-shaped blue stone in a metal setting. If topaz: Mohs hardness 8, vitreous luster, orthorhombic crystals, and perfect basal cleavage; color is often produced by treatment.

Formation & geological history

Topaz forms in silica-rich igneous rocks, especially granitic pegmatites and greisens. Blue topaz is commonly color-treated; the pendant’s stone cannot be dated or authenticated visually.

Uses & applications

Cut for jewelry; topaz is also collected as a mineral specimen.

Geological facts

Much commercial blue topaz begins as colorless topaz and is irradiated and heated to create blue hues.

Field identification & locations

A pear cut and blue color are consistent with topaz but also with glass or other gems; identification requires gemological testing. Topaz occurs in Brazil, Pakistan, Russia, and the United States.