Judging quality
Fine malachite shows tight alternating light and dark bands with a silky sheen. Beware pressed malachite powder in resin, which looks flat and shows a repeated pattern.
Carbonate
Malachite
Banded green copper carbonate with concentric bullseye patterning from botryoidal growth. Congolese material sets the standard for contrast and polish.
Care
Soft, and copper dust is toxic — never dry-grind or sand it. Wipe with a damp cloth only, no acids.
History & lore
The Malachite Room of the Winter Palace in St Petersburg used two tons of Ural malachite veneered over stone.
Cultural history, recorded as tradition rather than as medical or scientific claim.
Common questions about Malachite
- What is Malachite?
- Banded green copper carbonate with concentric bullseye patterning from botryoidal growth. Congolese material sets the standard for contrast and polish.
- How hard is Malachite and what is it made of?
- Malachite is a Carbonate-family mineral with the composition Cu2(CO3)(OH)2. It crystallizes in the monoclinic system and rates 3.5-4 on the Mohs hardness scale. It occurs in green.
- Where does Malachite come from?
- Notable localities for Malachite include DR Congo (Katanga), Russia (Urals), Namibia, Australia.
- How do you tell good Malachite from filler?
- Fine malachite shows tight alternating light and dark bands with a silky sheen. Beware pressed malachite powder in resin, which looks flat and shows a repeated pattern.
- How do you care for Malachite?
- Soft, and copper dust is toxic — never dry-grind or sand it. Wipe with a damp cloth only, no acids.
See it in person
Photographs only go so far
Both rooms are open six days a week, and there is always someone happy to pull pieces out of the case so you can compare them under the light.