in Science Diamonds are not forever. Under very high… by Chirag Chauhan January 31, 2016, 8:18 pm 163 Views Diamonds are not forever. Under very high heat, they turn into graphite, the stuff of pencils. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website By using this form you agree with the storage and handling of your data by this website. *