Jimmy,The stones are jelly and fire opals from Mexico. They are rough on the surface.The people we had authenticate it said it was probally from being worn under mail.On the back it says Otilia,Ortiz, and Wimslow.We were told the pieces were probally inscribed with the names of people owed money.Otilia is a Portuguese woman's name and Wimslow is English.Names of the 40 Portuguese and 1 Englishman, mercenaries, were not named on the manifest.Another deadend trieing to prove it was with DeSoto's trip.