What does 10c mean on ring?

The "10c" marking on a ring indicates that it is made of 10-carat gold, which contains 41.7% pure gold mixed with other metals for strength and durability. In the context of jewelry, the "c" typically stands for "carat," a unit used to measure the purity of gold. This means that a 10-carat gold ring is less pure than higher karat options like 14k or 18k, but it is often more affordable and durable for everyday wear.