Ladies lucky enough to have the stunning sapphire as their birthstone will be thrilled to receive this pair of sapphire gemstone earrings for their September birthday. Made from 9ct yellow gold and displaying a 3mm round sapphire gemstone, these studs measure 1.2cm from front to back and weigh 0.2 grams. Stamped with a 375 metal mark, butterfly backs easily fasten them in place.