What's That Rock?Cinnabar
A bright red mineral that is the main ore of mercury. It forms crusts and grains and has a very high density.
Safety
Contains mercury. Do not heat, grind, polish or taste it. Wash hands after handling and keep away from children and pets. Ask local rules for safe disposal.
How to identify Cinnabar
- Bright red to scarlet color
- Heavy for its size
- Soft: scratched by a fingernail or knife
Often confused with
- Realgaralso toxic
- Red jasper
- Red-stained rocks
- Hematite
Is Cinnabar valuable?
Moderate. Mercury risks limit the market.
What changes the price
- Color and crystals: bright scarlet crystals are the collector form
- Origin: historic mines (Almaden, China) command higher prices
- Contains mercury: it is toxic, selling and shipping are restricted in some places, and handling needs care
Uses
- Historic red pigment (vermilion) and mercury ore
Care
Keep sealed from heat and light.
Identifying a stone from a description or a photo is an estimate. Many stones look alike. Ask an expert or a gem lab before you buy, sell or rely on an identification.
Updated October 2026