Gemstone value of the stone. Some treatments are used widely because the resulting gem is stable, while others are not accepted most commonly because the gem color is unstable and may revert to the original tone. Heat can improve gemstone color or clarity. The heating process has been well known to gem miners and cutters for centuries, and in many stone types heating is a common practice. Most citrine is made by heating amethyst, and partial heating with a strong gradient results in “ametrine” – a stone partly amethyst and partly citrine. Aquamarine is often heated to remove yellow tones, or
The World Is Stone Alone", which was also featured on this soundtrack. Although this single was not released in U.S., it was a hit in several countries (number 15 in UK) but especially in France where it climbed to number two, stayed for three months in the top five and totaled 31 weeks in the top 50. Source The World Is Stone "The World Is Stone" is a single by American singer, Cyndi Lauper. This is the English version of the French song "Le Monde est stone" (1978), which was part of the "Starmania" musical and has been most notably associated with Fabienne Thibeault,