Amethyst
Amethyst is a variety of quartz that is characterised by its purple to violet-blue colour. It is one of the most famous and popular gemstones. Its color is due to the presence of trace iron in the crystal structure.
Amethyst has a shiny and transparent surface and is often mined in the form of crystals or geodes. Its crystals are hexagonal in shape and can be of various sizes. Amethyst is often used to make jewellery such as necklaces, bracelets, rings and earrings.