A market-wide average across qualities and sizes. Your stone's value depends on carat, color, clarity, cut, treatment, and origin.
Carnelian is an orange to reddish-brown variety of chalcedony (cryptocrystalline quartz), colored primarily by iron oxides. It is usually translucent to semi-opaque, with Mohs hardness around 6.5–7 and good toughness, making it suitable for a wide range of jewelry and carved objects.
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 carnelian is $10 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 carnelian index moved +1.5%. Gem prices move on supply, demand, and metal markets; treat any single stone as a collectible first and an asset second.