Semi-Precious Stones, Crystals, Dyed Fresh Water Pearls on Multi Strand Silk Necklace Semi-Precious Stones : Aqua Blue Necklace - Pearls, Agate stone beads Pastel Blue Necklace - Pearls, Agate stone beads Material : Silver plated chain, charm, lobster clasp and extension chain. Measurement : Length: 40 cm. Extension chain : 6 cm. Many of our pieces are hand made and feature natural materials, semi-precious stones, shells, pearls and so on. Size, colours and markings will naturally vary slightly from piece to piece.