1 If you put a diamond on your tongue, your tongue will start to get cooler! This happens because diamonds are great conductors of heat. Your tongue feels cool because the diamond is drawling heat out of your tongue.
2 The engagement ring is worn on the third finger of the left hand because the early Egyptians believed that the vein of love ran directly from the heart to the top of the third finger.
3 The largest diamond ever found was 3106 carats.
4 A diamond is four times harder than the next hardest material – corundum, from which rubies and sapphires are formed.
5 Diamond deposits were discovered in North America in the 1840s
6 A diamond is the hardest natural substance on earth, but if it is placed in an oven and the temperature is raised to about 763 degrees Celsius (1405 degrees Fahrenheit), it will simply vanish, without even ash remaining. Only a little carbon dioxide will have been released.
7 The diamond industry employs approximately ten million people around the world, benefiting and providing healthcare for millions.