"Black Diamonds are real Diamonds that get their color from the presence of iron oxide and minerals like magnetite and haematite. They are often treated to improve the color and clarity of the stone. Studies show that the value of the Lack Diamonds have increased threefold during the past few years. The clarity of the Diamond diminishes with the percentage of the impurities present in it. Black Diamonds also have some inclusion of these impurities such as iron oxide and minerals like magnetite and haematite. The advantage of these impurities makes the gemstone magnetic."