The live GemstoneAI index for spinel. For prices by quality and size, see the spinel price guide.
A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Spinel is known for its vibrant colors, ranging from deep reds to vivid blues and pinks. With a hardness of 7.5 to 8 on the Mohs scale, it is durable and suitable for various types of jewelry, often found in cushion or oval cuts.
Market averages will not price your stone. GemstoneAI identifies gems and jewelry from a photo, checks authenticity and treatment signals, and gives you a real market valuation in seconds. Free to try.
Featured in National Jeweler
The GemstoneAI market index for spinel is $518 per carat as of 2026-11-09. That is a market-wide average across qualities, not a quote for a specific stone. Individual value depends on carat, color, clarity, cut, treatment, and origin.
Visual tests alone are unreliable. GemstoneAI identifies the stone from a photo, shows what else it could be, and estimates market value. It is free to try.
Over the past 30 days the spinel index moved -0.4%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.