Which property of diamond makes it a precius stone?

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Solution

1. Hardness of diamond.
2. Refractive index of diamond is pretty high (2.417). Due to this fact, diamond shows an important application in optics and jewellery.
3. Diamond conducting property and heating property make diamond 5 times better conductor than copper
4. Diamond blades are used by surgery due to their sharp edges and crystalline property

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