- Made in 14K Gold - 16-18" Adjustable Chain Length - 0.18 Carat Total Weight 100% Natural Diamonds and Gemstones Guaranteed All our jewelry goes through a process of screening and testing to guarantee the diamonds and gemstones are 100% naturally mined. Item has been carefully inspected under our quality control standards. Solid 14K gold and natural, earth-mined diamonds in a size that layers with everything. Every stone is screened and tested so you know exactly what you're wearing.