Identification of Turquoise Nugget 2 Strand Necklace

This is another I picked up on a sale. Again, any information about it would be greatly appreciated. This one is 30 inches long with 2 strands.

You might try and chip a corner of one of the nuggets. Let me know if the color is solid or white? The heishe looks like clam shell. Where did you find this one? Thanks for sharing.