This ring is a knockout! 

 A luxurious, large, FANCY CUT blue topaz. The unusual cut of those stone is surely one of a kind. I’ve never seen anything like it. 
  •  14k Yellow Gold,
  • lost wax style
  • Large blue topaz with Fancy cut, prong set
  • Stone measurements are approximate, 20x16x12mm (tallest x widest x deepest)
  • Current size is 7, can be sized. Contact for details
  • Stamped 585, indicating 14k
  • Weighs 14.8g