Vintage TB152 Mexico Sterling Silver & Multi Color Oval Gemstone Cabochon Necklace.
Gemstones including: Turquoise, Black Onyx, Malachite, and Sodalite.
Marked: 925 Mexico TB-152 
Size: 18 1/2” length      stone 10mm x 15mm
Weight: 74.30 grams 
(Very good vintage used condition please see photos for additional details Thanks!!!)