natural color colour diamond encyclopedia encyclopædia naturel naturelle diamant couleur encyclopédie natural color diamond fancy color diamond color diamond encyclopedia sectionmedia stephane aisinber vivid purple pink brilliant intense pink hexagon intense pink radiant brownish pink pear shape light brown cushion chocolat brown brilliant deep reddish brown pear shape olive green emerald grayish-yellow oval deep orange brilliant brownish-yellow heart shape intense orange oval vivid yellow triangle vivid orange yellow marquise yellow cushion olive green brilliant intense yellow pear shape deep yellow triangle deep olive green marquise olive brown cushion grayish olive oval intense greenish yellow princess yellowish green bishops hat intense yellowish green radiant vivid green blue oval grey blue pear shape grey brilliant intense blue Asscher cut deep blue oval

The Blue Heart (deep blue) Some reports refer to this unusual diamond as the "Eugenie Blue", although it is now recognized that there is no evidence that the Empress ever owned it. The Blue Heart weighs 30.82 carats and has a rare, deep blue color. The Parisian firm Atanik Ekyanan of Neuilly cut it into a heart shape in 1909 or 1910, and this date raises the issue of whether the rough stone came from Africa or from India. In 1910 Cartier purchased the diamond and sold it to an Argentinean woman named Mrs. Unzue. At the time, it was set in a lily-of-the-valley corsage and remained so until Van Cleef & Arpels bought the gem in 1953. They exhibited it set in a pendant to a necklace valued at $300,000 and sold it to a European titled family. In 1959 Harry Winston acquired the gem, selling it five years later, mounted in a ring, to Marjorie Merriweather Post. Mrs. Post donated the Blue Heart to the Smithsonian Institute in Washington D.C., where it remains to this day.