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
Operation Gemstone Operation Gemstone In the context of the Watergate scandal, Operation Gemstone was a proposed series of clandestine or illegal acts, first outlined by G. Gordon Liddy in two separate meetings with three other individuals: (1) the then-Attorney General of the United States, John N. Mitchell, (2) the-then White House Counsel John Dean and, (3) Jeb Magruder, an ally and former aide to H.R. Haldeman, as well as the temporary head of the Committee to Re-elect the President, pending Mitchell's resignation as Attorney General. The first meeting occurred in the Attorney General's Washington, D.C., office at 11:00 a.m. on January 27,