Ring Style: Halo Rings Setting: Prong Stone Cut: Oval Stone Millimeter Measurement: 5 Mm Width, 7 Mm Length Metal Color: White Ring Gallery Height: 7.1mm Ring Top Length: 17.7mm Ring Top Width: 21.8mm Band Width: 3.5mm Care: Wipe Clean Stone Type: 1 Lab Created Opal, 148 Lab Created Sapphire Authenticity: Lab Created Stone Birthstone: October Birthstone Metal: Sterling Silver Country of Origin: Imported Gemstones may be treated and may require special care. Metal may be rhodium plated to enhance appearance and reduce tarnishing. Photos are enlarged to show detail.