Anonymous 03/21/16(Mon)l 1:10:07 No.27303759 Why dont they make bulletproof vests out of diamond if it is the hardest metal? 5 KB JPG j Anonymous 03/21/16(Mon)l 1:11:28 No.27303774 Cause it's too heavy. 1 gram of diamond weighs something like 15 grams. 27303789 # 27303795 # 27303892 #