Active Balancing: How It Works and Its Advantages Article MPS Soft Lily Drop Necklace by Firefly Jewelry. This intricately embellished mosaic jewelry is inset with a combination of Austrian Swarovski crystals and Czech glass beads. Lobster style clasp Silver chains are oxidized silver over brass Gold chains are brass Intricate design necklace length averages 16 17 inches Pendant style necklace length averages 16 17 inches Cross necklace length averages 17 19 inches Hypoallergenic, nickel free Firefly Jewelry specializes in elegant designs, innovative colors mixes and meticulous workmanship. Firefly uses filigree findings made from vintage molds, which give the jewelry a romantic look with a contemporary twist.