Lot 297. A Fine Golconda-Type 5.94 Carat Octagonal Step Cut Diamond. Estimate $ 275,000-325,000. © 2016 Leslie Hindman Auctioneers, Inc.

measuring approximately 12.94 x 9.26 x 5.72 mm, accompanied by a yellow gold ring setting. 

Accompanied by a Gemological Institute of America diamond grading certificate number 7111040, dated December 7, 2015, stating Weight: 5.94 carats, Color: D, Clarity: Internally Flawless, Polish: Very Good, Symmetry: Good, Fluorescence: None. 

Accompanied by a Gemological Institute of America diamond type analysis letter number 7111040, dated December 7, 2015, stating that the present diamond has been identified as Type IIa. Type IIa diamonds comprise less than 2% of all gem diamonds and are highly prized for their purity due to their lack of nitrogen, the coloring agent which causes a yellow hue in diamonds, and their optical characteristics, often attaining the highest levels of clarity. 

Leslie Hindman Auctioneers. IMPORTANT JEWELRY, April 3 2016 12:00 PM 1338 West Lake Street