White Stick Biwa Freshwater Pearl Necklace Sterling Silver Chain Crystal Bridal Style Wedding Style Beach Style. Long stick white Freshwater Biwa Pearls create a cascading design perfect for any woman. On ether side of the Pearls are round crystals to set off the Pearls. A beautiful flat Sterling Silver chain with a handmade Sterling Silver clasp finishes off the design. The necklace measures 21 inches but is adjustable for your neckline.