09105 - Beautiful Purple Natural Amethyst Geode Minas Gerais District - Brazil Raptor with a circular basal cross-section

with a circular basal cross-section

you can also see a replacement germ  tooth emerging under one of the main teeth

Subfamily MOSASAURINAE Williston

93 Inch = 23

the serrations of the Paleocarcharodon are very irregular

09105 - Beautiful Purple Natural Amethyst Geode Minas Gerais District - Brazil Raptor with a circular basal cross-sectionAmethyst is a purple variety of quartz (SiO2) and owes its violet color to irradiation, impurities of iron and in some cases other transition metals, and the presence of other trace elements, which result in complex crystal lattice substitutions. The hardness of the mineral is the same as quartz, thus making it suitable for use in jewelry.