20094 - Beautiful Deep Blue Azurite Crystals - Kerrouchen mine (Morocco) Pleuroceras In the same matrix you

In the same matrix you can see radius and ulna

Its enamel has a very intense color

or crushed

Argillochelys africana Tong & Hirayama

and the systematics and ecology of the genus

20094 - Beautiful Deep Blue Azurite Crystals - Kerrouchen mine (Morocco) Pleuroceras In the same matrix youAzurite is one of the two basic copper carbonate minerals, the other being bright green malachite. Simple copper carbonate (CuCO3) is not known to exist in nature. Azurite has the formula Cu3(CO3)2(OH)2, with the copper cations linked to two different anions, carbonate and hydroxide. Small crystals of azurite can be produced by rapidly stirring a few drops of copper sulfate solution into a saturated solution of sodium carbonate and allowing the