How Azurite Malachite Is Formed?

Azurite is a soft, deep blue copper mineral produced by weathering of copper ore deposits. The blue of azurite is exceptionally deep and clear. Specimens tend to lighten in color over time due to weathering of the specimen surface into malachite; this is why they are found together.

Why does azurite become malachite?

Azurite-Malachite Geological Properties

This stone changes in response to air, slowly turning into malachite over time. It is destroyed by heat, becoming a black copper oxide powder, and bubbles like a certain brand of cold tablet when exposed to hydrochloric acid!

How is malachite created?

Malachite is formed by surface weathering process of copper ore and generally not used for copper extraction mow due to insignificant resources and inadequate metallurgical recovery. The crystal system is monoclinic with perfect cleavage, and contact or penetration twinning.