20139 - Beautiful Purple Natural Amethyst Crystals Cluster Minas Gerais District - Brazil Cobaltoan calcite Africa and North America
Yard notes & kiln story
Description
Africa and North America
The matrix has some fractures that have been glued together
Age range: 460
Its size is enormous compared to the specimens that are usually found in this taxon
It has fractures that have been glued and filled (restored)
20139 - Beautiful Purple Natural Amethyst Crystals Cluster Minas Gerais District - Brazil Cobaltoan calcite Africa and North AmericaAmethyst 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.