Diamonds are formed over a period of a billion or more years about 150 km (90 miles) deep within earth’s crust. Intense heat and pressure alter the structure of graphite to create these brilliant stones.. Within time, they are pushed to the surface by volcanoes. Most diamonds are found in volcanic rock, called Kimberlite. Others are found in the sea after being carried away by rivers when they were pushed to the surface of the earth.
So, when people purchase diamonds in jewellery or for investment purposes, they have already undergone a long period of formation. Each diamond on the market is at least 990,000 years old, with many as old as 3,200,000,000 years old. Regardless of how recently a diamond has been mined from the earth, it’s already an anciently formed stone.
With how long it takes to form, it’s not surprising that diamonds are the hardest substance on earth. It is58 times harder than corundum, the next hardest mineral on earth, out of which rubies and sapphires are formed. Experts only discovered how to cut diamonds in the 15th century. At this time, they learned that the only way to cut diamonds was with other diamonds.
With these impressive feats, diamonds take up a critical position in the history of the earth. Over the generations, they were covered by ancient civilizations, royalty, and aristocracy. Their age and toughness is also partly what makes them so great for the traditional engagement ring, as it’s come to represent eternal love.
As far as an investment, diamond’s longevity and strength make them secure and crisis-resistant commodities. They are beautiful stones with unique characteristics and a long history.