22-karat is the most historical karat of gold, known for its malleability and ductility, while undergoing little to no oxidation. All Prounis jewels are made with a custom shade of the ancient 22-karat alloy, in which fine gold is mixed with a small dosage of copper and fine silver. The malleability of 22-karat allows the jewels to shape to the wearer over time. 22-karat gold has a vibrant yellow hue, and each piece begins with a matte finish. The wearer’s skin oils polish the metal over time, creating a lustrous shine.