Iolite color quartz and blue color quartz earrings. Iolite color quartz: approximately 10mm Blue color quartz: approximately 8 x 12mm Sizes may vary slightly depending on the stone. Frame: 22k Gold plated Hooks: Stainless steel ●Care Instructions● Usually, gently wipe with a soft cloth. ●As these are natural stones, stones, shells, and quartz, there may be cracks, inclusions, variations between left and right, differences in color density, and distortions in the frame. Please understand this before purchasing.