Bracelet- Dark Green Turquoise Beads / Stones w/ Black Areas - Tibetan Chunks???

Very unusual bracelet. Dark green stones or beads that have black on them. I do not know my stones, but a friend asked where I got it. Turkey. She thought it is Tibetan stones. I have know idea. Irregular stone sizes and shapes. Too big for my wrist. Hardly any shine to stones. 8” from clasp, across, to first (tightest) position. 10” for loosest measurement. Have had this for years and have never worn. Comes from non smoking household.