This 18" genuine Turquoise and .925 Sterling Silver necklace is definitely an eye catcher. The beading wire, lobster clasp and findings are .925 sterling silver. The beads that make the necklace are 3mm and 4mm .925 sterling silver beads. The genuine turquoise has been dyed and stabilized. The blue/green turquoise is B grade, measures approx. 18 x 16mm, and are a puffed oval shape. Chocolate colored leather spacers have been added in between the turquoise to bring out the colors of the turquoise. This is a chunky necklace.