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
Ulysses S. Stone Ulysses S. Stone Ulysses Stevens Stone (December 17, 1878 – December 8, 1962) was an American politician and a U.S. Representative from Oklahoma. Born on a farm near Weldon, DeWitt Township, Illinois, Stone was the son of David C. and Sarah J. Hollenbeck Stone. He moved with his parents to Jones, Oklahoma, in 1894, and attended the country schools and the University of Oklahoma at Norman. In 1902 he married Menor Minnie Butler, and they had one daughter, Helen. Stone engaged in the banking business at Jones, Oklahoma from 1894 to 1905 and as an oil operator at Norman and