Vintage Persian Turquoise Sterling Silver Necklace. The necklace has a 20 inch sterling silver frame. The back of the pendant is marked 925. The pendant measures 1-1/2 inches to the top of the pendant loop. Widest width 1-7/8 inches. The turquoise measures 3/4 of an inch high by 1/2 inch wide. Persian turquoise is the highest quality turquoise known. Turqoise is the astrological stone for Taurus. It can be worn by anyone. It is in excellent condition quananteed to please and delight the new owner. It weighs 14.2 grams.