18K yellow gold Grapesicle Chalcedony and diamond ring. The primary stone is an oval cabochon Grapesicle Chalcedony, or Grape Agate. Measuring 15.0 x 12.0mm, 9.45ct., a lavendar-toned gemstone with natural swirts of lighter and deeper purple hues. The primary stone is surrounded by a halo of 26 round brilliant-cut natural diamonds, and two straight baguette diamonds. The round diamonds continue onto the shank, 26 in total. The overall carat weight is 0.84ctw., H-color, VS2-clarity, prong set.