A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Spessartine is the manganese garnet, spanning vivid orange 'Mandarin' to deep burnt-orange and red-brown. Hardness around 7-7.5 with no cleavage makes it a durable jewelry stone, and like all garnets it is untreated — what you see is natural.
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.
The GemstoneAI market index for spessartine is $102 per carat as of 2026-08-04. 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 analyzes a photo of your stone for identity, treatment indicators, and authenticity signals, then estimates market value. It is free to try.
Over the past 30 days the spessartine index moved +1.9%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.