100% Titanium Earrings with Bezel Set Cabochon Opal Stone. Press fit butterfly back. Can Titanium can be color anodized to order. Please see color chat picture.Material - ASTM-F136 Titanium, Lab Grown OpalOpal Size - 5mm, 4mm or 3mm optionsGauge/Thickness - 20g ( 0.8mm )Length - 10mm ( 3/8")Sold in Pairs