Aventurine is a form of Quartz that has sparkly inclusions that give it the glittering appearance, most often inclusions of mica. Aventurine comes in many colours, and these are from different mineral impurities in the Quartz. Green Aventurine is from Fuchsite, Red is usually Hematite, Purple from Lepidolite and Yellow from Pyrite. The name 'Aventurine' comes from 'a ventura', which translates to 'by chance'. This relates to the accidental creation of goldstone in Italy in the 18th Century, and Aventurine was named for its similar sparkly appearance. Although it didn't receive its name until fairly recently, Aventurine has been used by humans for thousands of years for tools, decoration and jewellery. In the Omo Valley in Ethiopia, tools made of Aventurine have been found, the brittleness and hardness of the mineral valued for the ability to keep its sharp edge.