Silpada .925 Sterling Silver/Patina Brass/Cubic Zirconia "Charm School" necklace. Darloing Silpada "Charm School" Necklace - Features .925 sterling silver chain and 3 charms with patina brass, sterling silver, and cubic zirconia. Necklace measures 15.5" to 17" and lobster clasp. Excellent condition - slightly tarnished.