Sell Diamonds in the United States
  • KaratProportion of pure gold in a gold alloy, expressed in terms of 24 parts. Pure gold is 24 Karat, or 24 out of 24. 18 karat gold contains 18 parts pure gold and 6 parts alloy. The alloy is added to increase the gold’s durability
  • Keel LineFacet junction on the pavilion of a fancy-cut brilliant which forms an extended culet running parallel to the length of the stone
  • Kentucky DiamondMisnomer for rock crystal quartz from Kentucky
  • KerfGroove scratched in a rough diamond prior to cleaving or splitting
  • Key ColorPrimary color seen when looking at a diamond or another gemstone face-up
  • KnotIncluded diamond crystal oriented differently from the larger diamond crystal structure