Beschreibung:

Chamelelon diamonds are a very unusual variety of colored diamonds now gaining popularity due to the increased interest in all diamonds of color. The earliest reference of which we are aware mentioning such diamonds is in the 1866 novel “The Star of the South” by French writer Jules Verne: “This is one more curiosity, which puts this stone in the rare family of “chameleon diamonds”, it is usually to an abrupt variation in temperature that these colour changes in coloured diamonds are due, and they have been mentioned fairly often to scientific societies”. The Gemological Institute of Americas A Diamond Dictionary states that the first of these diamonds was only recognized and described in 1953. “Chameleon” diamonds exhibit a noticeable color change when heated to about 200 °C or also when they are kept in the dark for an extended period of time. Hence, they are both thermochromic (color due to change in temperature) and photochromic (color due to change in light). They contain moderate to high amounts of hydrogen, in addition to some isolated nitrogen and traces of nickel. The present stone which may originate from either the Argyle Mine in Australia or the Jwaneng Mine in Botswana features a fancy deep green-yellow oval-cut diamond. Set in a brilliant-cut diamond surround with a total approximately weight of 0.32 carats, mounted in 18K white and yellow gold, it is suspended from a delicate 14K white gold curb-link chain, length 19in.