Pearl Round Hotfix - Iron On Rhinstone Diamante Gems Assorted Sizes (D20 7mm - appx 500 a pack - appx 31g) A pack of Pearl Colour Round Diamante Gems 7mm Diameter, appx 500 a pack, appx 31g Each gem has glue on its flat back which is activated by heat from an iron or hot fix tool. Great for shoes, clothes, cards, dresses etc.