This is a perfect pair of sterling silver screw back earrings. The main photo shows the 6mm stone size earrings. These round, basket set birthstone earrings are available in various stone sizes from 3mm-10mm. These studs features top quality AAA grade pink cz stones hand set in .925 sterling silver. The cubic zirconia stones are set in a strong basket setting, the basket setting is a huge upgrade over the prong setting. The earrings are fastened with secure screw backs. Pink Tourmaline is the October birthstone. Great for everyday wear or save them for that special occasion. 4-SSE-PIRDBKSB.