Open pendant curled around. Material: 14 karat gold Jéh's gold jewelery line is made of 14 karat gold. This carat grade is most commonly used in the Netherlands because of its hardness and color. Pure gold is too soft to make wearable jewelry, so additional metals are used. Silver and copper are often used so that you can continue to speak of 'precious metals'. With 14 carat gold, out of 1000 parts, 585 parts are pure gold. The remaining 415 parts therefore consist of the other metals.