Hallmark looks like Ramon Albert Jr, but item doesn’t look Hopi. The leaves don’t look like the usual NA made leaf. But what do I know?
Stone looks like it could be natural in the photo, and is the primary focus of the bracelet design, but is cracked which renders its value close to nil . Leaves are machine made. ‘Hallmark’ looks as if it may be comprised of two readily available block letter stamps, Shank could be handmade or a ‘one of many’ casting typically used in a production setting.
Without real provenance, which in this case the hallmark does not establish, one can say it’s a (likely) sterling bracelet with a cracked turquoise stone setting, hand crafted with machine made leaves, and possibly cast shank, of unknown origin.
^Very Hopi style work, very unlike the bracelet shown. I get the similarity of the conjoined letters (though absent an accompanying symbol) but to me the question is still open.