8 MM BY 6 MM NATURAL OPAL STUD EARRINGS SET IN 14 K YELLOW OR WHITE SETTING . 1.98 CT TOTAL . PUSH BACK  THE OPALS ARE AUSTRALIAN NATURAL OPALS . HINT OF RED BLUE HUES WITH CREAMY WHITE COLOR . THE BACKS ARE PUSH BACK . I CAN MAKE THEM IN SCREW BACKS ALSO .