Natural Blue Peruvian Opal Necklace. 150 gemstones. A soft baby blue gemstone color. Natural faceted soft shades of natural baby blue, 4mm in size The necklace length is 20" long. The chain are clasp are sterling silver or 14k gold filled - you choose finish. Great simple everyday necklace. Wear alone, add a pendant or jumble with other necklaces. Wonderful for blue lovers. Shipping is Free!