Stud earrings look fabulous on everyone. And when you personalize them with something like a birthstone, they become extra special. At Diamond Club, we carry an extensive selection of birthstone stud earrings in different shapes and sizes. The sterling silver round cut  January siam birthstone stud earrings are a halo design, and great for those with a January birthday, or for those who simply love siam stone. The setting is made up of yellow rhodium electroplated sterling silver and has been set with high quality CZ stones that look genuine.