These Hello Hobby Craft Rhinestones are perfect for adding sparkle and glam to crafts and school supplies! These 18mm acrylic gemstones faceted and rainbow colored to catch the light like a real gemstone. Gems are flat backs allowing them to easily adhere to paper fabric plastic and other surfaces with glue. Create sparkling designs on unisex kids or teens posters and crafts or fashion gear like cell phones and laptop cases. 40 ct Fake Gems.