By Website Editor
•
March 27, 2020
10 FASCINATING FACTS ABOUT DIAMONDS The word “Diamond” comes from the Greek word “Adamas” which means “unconquerable and indestructible. A suitable name for the hardest natural substance on earth. Diamonds are 58 times harder than the next hardest mineral on earth, corundum. This is the mineral from which other stones, such as rubies and sapphires, are formed. The hardness level of diamonds doesn’t mean that they are unbreakable. Even though the chances are really small, it is possible to break or bruise a diamond in everyday use by knocking the diamond against something hard. Diamonds can also melt, but this is done at a melting point of 3547℃ and a boiling point of 4827℃ (a bit too hot for us to try). Pencils and diamonds share a remarkable characteristic. Diamonds consist of 100% carbon. The lead of a pencil (the graphite) also consists of 100 % carbon. However, because the crystals are arranged differently, the graphite of the pencil is very soft and not comparable to the hardness of diamonds. Diamonds are literally one in a million. On average, one million units of rock need to be mined in a diamond mine for one part of diamond. Converted to carats, about 250 tons of earth is mined to produce one carat worth diamonds which is a testament to the scarcity and preciousness of the gemstone. Diamonds are timeless. The earth is approximately 4.5 billion years old and the oldest diamonds are believed to have been crystallised approximately 3.3 billion years ago. The average mined diamond is between 1 billion and 3.3 billion years old. To put this in perspective: diamonds are older than the Atlantic Ocean, which opened up when the supercontinent Pangaea began to break apart about 200 million years ago, and the dinosaurs, which died off 65 million years old. It is then appropriate to say that the diamond on your finger is literally timeless. The largest diamond was discovered in South Africa. The Cullinan diamond was discovered in 1905, in South Africa, and weighed in at an astonishing 3106 carats, or 1.33 pounds. The diamond was eventually cut into nine large diamonds and 100 smaller ones, and the three largest of these are on display in the Tower of London as part of the crown jewels. Diamond Countries The countries that are the main sources of diamonds have changed significantly over time. India was the world’s original source of diamonds in 1400s when Indian diamonds were sold in Venice and other European trade centres. India’s diamond supplies declined in 1700’s and Brazil then became the world’s leading source of diamonds, until the late 1800s when a huge diamond reserve was discovered in South Africa. Today, diamonds are mined in many parts of the world with the leading suppliers being Russia, Botswana and Australia. Diamonds form much deeper in the earth than other minerals. Most minerals including corundum (ruby and sapphire) and beryl (emerald, aquamarine and morganite) form in the earth’s crust, which is the layer upon which we all live. However, diamonds are formed much deeper in the earth, beneath the crust at depths of 150-200 kilometres in the base of old, thick continents. Some diamonds are formed even deeper than that, at the boundary between the earth’s mantle and its outer core. These diamonds are known as superdeep diamonds. Diamonds are delivered to the surface through volcanic eruptions. These eruptions produce the kimberlite and lamproite pipes that are sought after by diamond prospectors. You can say diamonds are an “accidental passenger” in these explosions (and we are grateful they came along for the ride). Diamonds carry valuable information in their mineral inclusions, which most commonly include kyanite, garnet and olivine. Diamond inclusions help researchers understand the distribution of elements in the earth’s layers, for example, or when plate tectonics started. A diamond planet? The most mind-blowing diamond theory perhaps is related to the discovery of the planet “55 Cancri e”. Discovered in 2004, the planet orbits a nearby star in the Milky Way and is believed to be composed of mostly carbon, and is one-third pure diamond (now, that’s our kind of planet). If you are interested in learning more about diamonds, their characteristics and how they are valued visit our Diamond Education Guide here .