What does nrt 10 mean on jewelry?

"NRT 10" on jewelry typically indicates that the piece is made of 10 karat gold that has been treated with a non-reactive technology (NRT) to enhance its durability and appearance. The "10" signifies that the gold content is 41.7% pure gold, while the rest is made up of other metals. This marking is often found on jewelry pieces that aim to combine the aesthetic appeal of gold with increased strength and resistance to wear.