gemstone

Blue sapphire ring

Corundum (aluminum oxide, Al₂O₃), likely heat-treated sapphire

AI-generated identification · may be incorrect

Hardness 9 Mohs; vivid blue, vitreous luster, trigonal crystal structure, no prominent cleavage, specific gravity about 4.0. The rectangular step-cut stone is mounted in gold-colored metal with accent stones, possibly diamonds or simulants.

Identified August 18, 2026More gemstone →

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At a glance

Common name: Blue sapphire ring
Scientific name: Corundum (aluminum oxide, Al₂O₃), likely heat-treated sapphire
Category: gemstone
Identified: August 18, 2026
Method: Standard

AI Estimated Value

Approximately $50–$300 for costume or synthetic sapphire jewelry; $500–$5,000+ for a natural, documented sapphire ring, depending on color, clarity, carat weight, treatment, and metal.

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

Sapphire forms in aluminum-rich igneous or metamorphic rocks, commonly in basalt-related deposits, marble, or placer gravels; its geological age varies widely. The image cannot establish whether the stone is natural, synthetic, or treated.

Uses & applications

Used chiefly in jewelry and valued for exceptional scratch resistance; corundum is also used as an abrasive. Blue sapphire is the September birthstone and traditionally symbolizes loyalty.

Geological facts

Blue color usually comes from trace iron and titanium; Kashmir, Myanmar, Sri Lanka, Madagascar, and Australia are major sources. Reliable identification requires refractive-index, microscopy, and inclusion or spectroscopy testing.

Field identification & locations

Field clues include strong durability, glassy luster, and blue color, but glass, synthetic spinel, and lab-grown corundum can look similar. A jeweler or gem laboratory should test the mounted stone.