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

Red Cross (canary yellow) The Red Cross is a cushion shaped, canary yellow diamond weighing 205.07 carats. When it was discovered in one of the De Beers mines in South Africa in 1901, it weighed 375 carats. When put under a brilliant light, this diamond absorbs part of it and subsequently becomes phosphorescent (self-luminous) in the dark. Another thing that distinguishes this stone is that on the upper facet, the shape of the Maltese cross is clearly visible. Cut in Amsterdam, the stone was offered by diamantairs at an art sale held in London in 1918 under the auspices of Christie's, for the benefit of the Red Cross. Since then it has re-appeared from time to time during auctions, for example in Tokyo in 1973 where it was withdrawn, its reserve price not having been reached. Its current owner is not known.