18k Diamond Bezel/ Gold Tooth Gem/VS1 Diamond Tooth Gem/ Tooth Charm/. These are handmade, Real 18 karat nickel free diamond bezel diamond that come in 6 different sizes. These are generally applied to teeth using a composite with a trained professional. #1 Diamond size. • 0.1 caret Stone dimension • 1.25 mm bezel rim size (1.6 mm.) #2 Diamond size • .015 caret Stone dimension 1. 5mm bezel rim size (2mm.) #3 Diamond size • .02 caret Stone dimension 1.75mm bezel rim siz (2 mm.) #4 Diamond size • .03 caret Stone dimension 2 mm bezel rim size (2.5 mm.) #5 Diamond size • .04 caret Stone dimension 2.25 mm bezel rim size (3 mm #6 Diamond size • .06caret Stone dimension 2.5 mm bezel rim size (3.2 mm.)