These earrings have so much sparkle! The stone diameter is appx. 1/2". The blue stone reflects shades of green, yellow and purple. Set in a shiny silver-tone round bezel setting. Post closure with bullet disc backing. These are really versatile and I'm sure will be a new favorite! In stock and ready to ship out. Comes in a gift box for easy gift-giving. They're so fun though, you might be tempted to keep them for yourself!