Worth some money. 18k gold inlaid agate pendant is valuable, and the agate inlaid in 18K gold ranges from 5000 to tens of thousands. Buy according to your own needs. K gold is a symbol of gold purity. The theoretical value of gold content of 24K gold is 100%, and the gold content of 18K gold is 75%. Agate is a kind of fine-grained jade, often mixed with opal, with various colors or arranged in strips.