Onyx is a fine, 0.015 hex measurement and is a matte black with light shiny sparkle. This color is perfect for men as it has little bling. This smaller sized flake size allows for more coverage as a base coat and adds detail to indoor pictures, signs, sets, shoes, tumblers and other art projects. This glitter does not appear to have blue undertones but has small black and clear sparkle flakes. Use it with clear glues, and epoxy with your projects.