Term: Diamond, Description: Allotrope of carbon often used as a gemstone and an abrasive, Question: Is Diamond twice as hard as Nephrite?, Answer:No
Fact1: Diamond is a carbon composed element used in gemstones. Fact2: Nephrite is a hard green mineral that is one of the forms of jade. Fact3: Moh's Hardness Index measures how hard certain minerals are. Fact4: Diamond has a Moh's Hardness Index of 10. Fact5: Nephrite has a Moh's Hardness Index of 6. 