These 'Mystic Fire Topaz' gems have been Certified genuine with the following U.S. patent numbers; 5,853,826 / 6,997,014 / 7,137,275 and 7,526,928 The Celtic knots in our sterling silver rings are taken from Ireland’s national treasure; the book of Kells Silvershake 7X5mm Genuine Oval Shape Mystic Fire Rainbow Topaz White Gold Plated 925 Sterling Silver Triquetra Celtic Knot Solitaire Gemstone Ring; is shipped to you in anti-tarnish protection inside reinforced gift boxes with satin-style pouches; guaranteed beyond competitors Know someone with a November birthday? Their birthstone is Yellow Topaz or Citrine. If it's December; Sky, Swiss or London Blue Topaz or Tanzanite, Turquoise and Zircon are their birthstones Silvershake 7X5mm Genuine Oval Shape Mystic Fire Rainbow Topaz White Gold Plated 925 Sterling Silver Triquetra Celtic Knot Solitaire Gemstone Ring Size 6