Item:925 silver ring and earring with natural gemstonesmaterial:925 silver ,silver weight:approx.5.12g( one set)Center stone:Natural opalGemstone Size:oval6*8mmGemstone cutting:Normal cutGemstone Quantity:3pieceGemstone Weight:approx.3.4caratside stone:cubic zirconRemark:there are many colors in natural opal.The colors will not be exactly same as photo.thanksRING SIZE CHARTUS RING SIZE:6# Approx.Diameter:16.3mm Cirumference:51.2mmUS RING SIZE:7# Approx.Diameter:17.2mm Cirumference:53.9mmUS RING SIZE:8# Approx.Diameter:17.8mm Cirumference:55.9mmUS RING SIZE:9# Approx.Diameter:18.4mm Cirumference:57.7mm