Green onyx beaded necklace with sterling silver toggle clasp

This is a pre owned necklace in excellent like new condition not showing any signs of use.  Green onyx beads spaced with tiny green glass seed beads. Onyx beads in various graduated sizes and shapes measuring 18 inches in length strung on wire. Toggle clasp is stamped 925 for sterling silver. *nerd notation: green onyx is a trade name for dyed agate or chalcedony. Reasonable offers considered