Azurite and Malachite
Azurite is a hydrated form of copper (up to 58% copper), it crystallized in striking blue crystals and often forms in association with green malachite.
Colour: azure blue, blue, light or dark blue – light blue in transmitted light
Formula: Cu3(CO3)2(OH)2
Malachite is a rich green secondary mineral, containing up to 58% Copper.
They form according to a monoclinic crystal structure and have a hardness 3.5-4 on the Mohs scale with a specific Gravity: 3.6 – 4.05 and a Adamantine, Vitreous, Silky, Dull, Earthy luster.
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