Until well into the 20th c. conducting one's own archaelogical dig was not prohibited in Mexico - both Spratling and Davis are known to have engaged in personal digs and their collections were frequently enriched by the fruits of those excavations. Quite often ancient, pre-Colombian beads as well as small stone artifacts that surfaced here and there were incorporated in pieces of jewelry silversmiths made in the first decades of Mexico's Silver Renaissance. I believe the stone beads in the necklace presented here are probably examples of that practice. They are obviously hand-drilled with most of them having unusually large drill holes (at least some of them show evidence of having initially been bi-conically drilled and, as I suspect, having had their drill holes expanded later?). All beads have the unevenness characteristic of early hand-cut beads and several among them are not even spherical in shape. And ... they are gorgeous! In this choker they alternate with hand-wrought silver beads to form a very different Mexican Deco choker.
The necklace measures 15" long (wearable), The diameter of the silver beads is just shy of 1/2" while the stone beads vary between 1/2" and 5/8". Weighing 60.8 grams, the choker is strung on silver chain and has a hefty hook clasp, marked "TAXCO" and "925 JM", it dates in the 1930s-40s (for the silver parts) but I believe the beads are really old and definitely pre-Colombian. In excellent vintage condition.