21195 - Beautiful Azurite Cristals + Malachite Cristals + Pyrite Crystals in Quartz Matrix - Alnif (South Morocco) Phacodus Borkopleura

Borkopleura

Belgium (1)

Aragonite will change to calcite over timescales of days or less at temperatures exceeding 300 °C and vaterite is even less stable

Its size is enormous compared to the specimens that are usually found in this taxon

Tooth 5: 55 mm (2

21195 - Beautiful Azurite Cristals + Malachite Cristals + Pyrite Crystals in Quartz Matrix - Alnif (South Morocco) Phacodus BorkopleuraAzurite 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