60's Turquoise Poison RingVintage circa 1960 poison ring is sterling silver and was made in Mexico. The Taxco stamp is barely visible. This company was known for making these great poison rings and other biker and hippie sterling silver jewelry in that decade. This one is adjustable and is currently a size 8. The cabochon stone is Mexican green turquoise. It still opens with ease. There are some condition problems with the inside wall of the poison compartment. The metal bar