Beautiful large 50″ 10mm green stone mala 108 beads / necklace

Beautiful large green stone mala beads / necklace. Not sure of the stone, possibly aventurine? Strung on yellow silk or silk-like cord. The beads are 10mm; measures approximately 50″ long with a 2 3/4″ drop. Never used, NWOT. Please examine the pictures carefully, as they are an important part of the description. Thank you and please let me know if you have any questions!