Malachite is a beautiful dark green and light green crystal although very delicate I would not use it in jewelry where impact is a concern. I’ve seen beautiful carvings made with this crystal and they are very delicate.
It is from the monoclinic crystal system. With a Mohs hardness of only 3.5-4 **, and can grow in Botryoidal clusters. It is Very decorative and it is said to line some palace walls. Known to protect against the Evil Eye it can also help stomach ailments. Usually found in Australia, Chile, South Africa, USA and Russia.
**Source: The Book of Stones by Robert Simmons and Naisha Ahsian