Jewelry Closure: Spring Ring Clasp Setting: Prong Shape: Butterfly, Animals Stone Cut: Round Stone Millimeter Measurement: 2.5 Mm Length Metal Color: Two Tone Chain Length: 18 Inch Chain Width: .7 Millimeters Pendant Length: 20mm Pendant Width: 8mm Chain Construction: Rope Care: Wipe Clean Stone Type: 1 Genuine Amethyst, 18 Lab Created Sapphire Authenticity: Genuine Stone Birthstone: February Birthstone Metal: Sterling Silver, 10k Gold Necklace Type: Pendant Necklaces Pendant & Charms Type: Pendants 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.