Thursday, 7 November 2013

Chameleon Diamonds

The rarity of chameleon diamonds and their interest for the connoisseur are due to their unusual ability to change color temporarily when heated to about 150°C, or after prolonged storage in the dark.

Chameleon diamonds are also sensitive to different lighting types and will show different colors if observed under halogen light, incandescent light and daylight. If Chameleon diamonds are exposed to heat they can change to a greenish-yellowish color very quickly and when they cool down and stabilize their normal color will return; this is known as thermochroism.

With all natural fancy color diamonds, an element other than carbon has made its way into the diamond which results in a new color.

In the case of Chameleon diamonds, an excess of hydrogen and a small amount of nitrogen has entered the diamond and creates the unique color-changing property.
One of the most amazing Chameleon diamonds is a 8.04 carat radiant cut diamond that was evaluated by GIA and classified as “fancy dark grey green chameleon”. It is set in a ring surrounded by pink pave diamonds and pink gold. That diamond is valued at $2,100,000