Amazon.com: Enenes Glass Cabochon 25mm Clear Glass Dome Cabochons for Jewelry Making 100 PCS Round Dome Cabochons with Flat Backs Glass Dome Tiles Clear Cameo for Pendants and Crafts (25MM 100PCS) :
20pcs 8-25mm Double circle brass Pendant Trays,Pendant Blanks Bezel Base, Glass Cabochon Settings
Zb1224 Country Usa Russia Canada 10pcs Mixed 12mm/18mm/20mm/25mm Round Photo Glass Cabochon Demo Flat Back Making Findings - Jewelry Findings & Components - AliExpress
25mm Round Shape Orange and White Dried Flowers Flat Back - Etsy