NEW ThreadNanny CZECH Quality 10gross (1440pcs) HotFix GOLD Rhinestones Crystals - 4mm/16ss GOLD Color 10 Gross (1440 Stones Total) CRYSTAL GLASS Rhinestones. These are NOT acrylic. Extra Sparkle GOLD (AURUM) hotfix Rhinestones Czech Quality Precision cut multi-faceted - flatbacked HOTFIX Glue on bottom makes them easier to attached 4mm Size (16ss). Other sizes available too.