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One of the difficult features to find in dentition samples of Spinosaurus is present in this piece
Tooth 5: 55 mm (2
It has small glued fractures near the tip
It is almost full
more recent studies have proposed that the far origin of the great white is closer to the Cretolamna genus than to the Paleocarcharodon
21195 - Beautiful Azurite Cristals + Malachite Cristals + Pyrite Crystals in Quartz Matrix - Alnif (South Morocco) Phacodus One of the difficult featuresAzurite 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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