If the platform is Macintosh, use the Macintosh style sheet. In other words, the skillful preparation of gemstones works to consumers advantage by increasing the supply of gems. For example, most aquamarines are green when found. Mild heating permanently changes the color to the lovely sea blue we associate with aquamarine.
Some rubies contain iron which creates a purplish color.
The use of heating changes the state of the iron, removing the purple and heightening the desirable red. After heating a purple-brown gem discovered in Tanzania in 1962, it was found that it turned a beautiful deep blue. Without heating, tanzanite would probably not have become a candidate for jewelry. Sapphires, citrines, topaz, amethysts and zircons are other popular gems that are regularly heated. Irradiation Atomic energy does indeed have peaceful purposes.