22088 - Beautiful Purple Natural Amethyst Geode Minas Gerais District - Brazil Myliobatis The matrix has several fractures
Yard notes & kiln story
Description
The matrix has several fractures that have been glued and slightly restored
• Pliocene of Mexico
United States ( Indiana
Lapparent 1957
which probably functioned as gills
22088 - Beautiful Purple Natural Amethyst Geode Minas Gerais District - Brazil Myliobatis The matrix has several fracturesAmethyst 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.