Diamond Painting Square Crystalsare made of resin and have the same faceting structure as a standard diamond painting drills.. These drills are also the same size as the drills provided with most diamond painting kits. You will receive a 14-gram bag with Approx. 2900 drills.Diamond painting <strong>Square Crystals</strong> have bright and reflective colors and resemble rhinestones. You can use them to add more sparkle to your diamond painting. These drills rival the beauty and shine of glass rhinestones.</p>