Here are some interesting facts about diamonds from the experts at Steven Stone fine diamond jewellers. The word diamond comes from the Greek word ’adamas’ meaning unconquerable. Diamonds are the hardest natural substance on earth. Most natural diamonds found are between one and three billion shears old and are formed deep within the earth’s crust. Diamonds are found in mines across the world including Africa, Canada, Botswana and Brazil. The diamond formation occurs miles below the earth’s surface under intense heat an crushing pressure mostly in the earth’s mantle. Diamond are forced up to the earth’s surface by volcanic rocks irrupting and can be found volcanic rock, known as Kimberlite, Diamonds are often drifted away from the volcanic rock Kimberlite and found by the sea and river beds. Not all diamonds are white, Due to impurities diamonds are found in shades of blue, yellow, pink, orange and red. The rarest mined diamonds are vivid pink, blue and green coloured. Around 80% of diamonds mined every year are not suitable to be cut into diamond jewellery. Diamonds are the only natural gemstone that is purely made up of one element - carbon making it the hardens natural substance. Diamonds are graded by four main characteristics - cut, colour, clarity and carat weight know in the industry as the 4Cs - learn more The second hardest natural substance on earth after diamond is corundum, which forms rubies update `wp_posts` set `post_content` = one of the rarest gemstones) and sapphires. The largest diamond known to earth is called the Cullinan, found in 1905 in South Africa and is an impressive 3,106.75 carats. The Cullinan diamond is nearly flawless in colour and clarity and was cut into the famous great Star of Africa and is The world’s largest diamond is called the Cullinan and was found in South Africa in 1905 and is an impressive 3,106.75 carat uncut. The diamond was cut into the famous 530.2 carat great Star of Africa, the 317.40 carat lesser Star of Africa and 104 other diamonds that now form part of the British crown jewels. Until the 15th century only kings wore diamonds as a symbol of strength and power. Now-a-days diamonds are symbolise love and mainly sold in engagement rings. The tradition of giving a diamond Engagement ring begun in 1477 when Archduke Maximillion of Australia gave a diamond ring to Mary of Burgundy. Due to cleaver advertising campaigns the tradition of giving loved ones diamonds has become increasingly popular. It was said that Cupids arrow was tipped with diamond, which has the impressive magic to form the power of love between two people.