It's hard (for me) to believe, but the exhibition edition of the Tip of the Iceberg ring was in The Nature of Diamonds exhibition ten years ago!Organized by the American Museum of Natural History in New York, it opened in Toronto at the Royal Ontario Museum, before moving on to the Houston Museum of Natural Science, and then the Field Museum in Chicago. Total exhibition length 2008 to 2010.The Incomparable Diamond (as it was set then) was the headliner for the entire exhibition. At 407.48 carats, it is the third largest cut diamond in the world, and graded as fancy brownish yellow diamond, with the highest clarity grade of internally flawless (IF).In the accompanying article 'An Illuminating Exhibit' in Canadian Mining Magazine, the Tip of the Iceberg ring holds its own versus the Incomparable Diamond. With over 200 historic and modern diamond jewels in the exhibition, the Iceberg ring did very well.To its 2.78 ct favour, was that the diamond crystal it showcased was uncut and natural, coming from Canada's first diamond mine, the Ekati mine. At that time, very few people had seen a natural uncut diamond crystal set in jewellery: a rarity.Since the exhibition, the Incomparable diamond has been sold to Mouawad and reset into a necklace, and named the world's most expensive necklace by Guinness World Records, with a valuation of $55 million.I still sell custom editions of the Tip of the Iceberg ring, with only a couple of diamond crystals left. Yes, they are laser inscribed and certified; much more affordable than the Incomparable, but with a comparable rarity, and good pedigree.