Iron-on rhinestones are known as hotfix rhinestones or hotfix crystals in the industry. (Hotfix is also misspelled as hotfix.) These stones contain a heat-activated adhesive on the back side and are best utilized with fabric-based products. Hotfix sticker in the shape of an air cloud, glossy and resistant to fading. At the same time, these stickers are simple to apply on your own jewelry, such as bracelets and necklaces.