why Diamond is precious while coal and diamond have the same properties
Kindly refer to the following link:
https://www.meritnation.com/ask-answer/question/coal-is-also-a-form-of-carbon-and-diamond-is-also-a-form/science/4847199
https://www.meritnation.com/ask-answer/question/coal-is-also-a-form-of-carbon-and-diamond-is-also-a-form/science/4847199