Help identify bracelet "heart" + ring size 9 "BM" hallmarks? (Looked but come up empty)

Hello friends, first time poster after just learning of this wonderful forum.
I bought this size 9 ring and bracelet recently. I’ve searched and searched but have come up empty on the “BM” on the bracelet and “heart with MR” (or points on top of heart) on ring.

  1. Do these hallmarks ring any bells?
  2. Any idea of turquoise source?
    Thank you!

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So far I haven’t found anything. But there are others on this site with better resources than I have. Good luck!

Thanks for looking, Ziacat!