But GIA Certified Diamond are distinctly different from theirs close cousins the common mineral graphite and lonsdaleite, both of which are also composed of carbon.
Some loose diamond are composed of carbon, that is recycled organic matter, previously incorporated in marine organisms.
One of the two principal diamond earrings trade routes passed through Venice. It enjoyed a monopoly of the wedding ring trade on its way to the main towns of southern Germany up to its final destination in Bruges.