Diamond - Carbon
The world’s most popular and recognizable gemstone- diamonds first appear in history books as early as the 4th century BC in India where they were used in trade. Slowly, they found their way to Western Europe. By the 1400s, diamonds were becoming all the rage with Europe’s elite. When the 1870s arrived, annual rough diamond production was under a million carats a year and by the 1990s it was over 100 million carats a year. Diamonds are the birthstone for April and are considered the traditional stone to propose with. They rank 10 on the Mohs hardness scale, making it the defining material for the scale.