I would say it is a type of agate. It looks to be slightly transparent. Defiantly not tigerite. Tigerite is not transparent and has a silky appearance.
These are two different banded agate hair pins that I sold for $89. They were unmarked and sterling. Is your bracelet marked Mexico and?? <img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=982246"/>