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21196 - Beautiful Azurite Cristals + Malachite Cristals + Pyrite Crystals in Quartz Matrix - Alnif (South Morocco) Unidentified Asaphids Onchopristis tooth in its natural

SKU: 43164262730
USD135.50 USD163.50

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Description

Onchopristis tooth in its natural matrix

Bruton 1967

Orthoceras siculum

weakly striated pedicles

21196 - Beautiful Azurite Cristals + Malachite Cristals + Pyrite Crystals in Quartz Matrix - Alnif (South Morocco) Unidentified Asaphids Onchopristis tooth in its naturalAzurite 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

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