Large Rose Cut Super7 Amethyst is frame and claw set in polished sterling. Size 8 1/2. Super7, or Amethyst cacoxenite is quartz with inclusions of amethyst. the appearance can be misty, dot or needle like and range is colors from clear to mossy quartz and insclusions run from reds to brownish purple. this speciman is clear quartz with rust colored dots and was chosen so the fretwork on the underside of the rings shows through.