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Diamonds are one of the world's most precious gems. The word diamond comes from a Greek word, "adamus", which means invincible. This is because diamonds are the hardest minerals in the world. They are 1000 times harder than rubies or sapphires. Not even the most powerful acids can harm a diamond's surface. Diamonds really are invincible!!
How are diamonds formed?
Do you know the four C's?
How are diamonds used?
Where are diamonds found?