11mm Aquamarine beaded necklace with sterling silver clasp

This necklace was part of an estate purchase and is in excellent pre owned condition showing little to no signs of wear.  Genuine aquamarine beads measuring about 11 mm in diameter. Necklace measures about 20 inches in length with extension chain adding another 1.5 or so inches. Sterling silver lobster clasp and extension chain. Strung on wire for durability. 925 BBJ Reasonable offers considered