John Bead Preciosa Viva 12 Flatback Czech Crystal Rhinestone. The lead-free MC Chaton Rose VIVA 12 is an exclusive Preciosa product, known for its brilliance, sparkle, and luster. Twelve facet crystal. Characterized by an intense Aurora Borealis effect and high durability of bonded surfaces. Highly resistant multilayer silver foiling protects against damage and intensifies the brilliance. ss12 Crystal- 120 pieces, approximately .13".