Malachite was being used as a source of copper more than 7000 years ago.
It often occur with or close to azurite. The presence of these minerals often indicates native copper is close by.
Malachite rarely forms individual crystals. It usually occurs in masses or clusters of radiating crystals.
Minerals with a massive crystal habit crystallise as one large mass. Individual crystals have no visible external shape or structure.
With malachite being an ore of copper its dust is toxic. It's also a very soft mineral. These characteristics can make it a challenging stone to cut.
Malachite should not be allowed to get wet and must never be used as an elixir.