Features: Quick Ship Jewelry Closure: Spring Ring Clasp Link Construction: Solid Setting: Invisible Shape: Heart Stone Millimeter Measurement: 16 Mm Length Metal Color: Yellow Chain Length: 18 Inch Chain Width: 1.5 Millimeters Pendant Length: 21.1mm Pendant Width: 16.1mm Stone Treatment: Dyed Chain Construction: Rope Care: Wipe Clean Stone Type: 1 Genuine Onyx Metal: 10k Tri-Color Gold Necklace Type: Pendant Necklaces Pendant & Charms Type: Pendants Assembled in the US from Imported Materials Metal may be rhodium plated to enhance appearance and reduce tarnishing. Every piece of Black Hills Gold jewelry is made in the Black Hills of South Dakota. Traditional Black Hills Gold designs are typically comprised of 10K yellow gold or sterling silver and accented with 12K green and rose gold colored grape leaves. Legend has it that good luck comes to those who wear Black Hills Gold jewelry. Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.