Spellbinders Colour Essentials Gems 108 pack Opal - This sheet of self-adhesive Opal gems is from Spellbinders. This package includes 108 gems. These gems will add extra sparkle and movement to all of your paper crafting projects. These gems have four sizes, 2mm, 3mm, 4mm, and 5mm. These gems can be used on cards, scrapbook pages, tags, journals, planners and other paper crafting, home decor and mixed media projects.