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 Known Universe (album) The Known Universe (album) The Known Universe is the fourth studio album by Cincinnati-based indie rock band Ass Ponys, released in April 1996 on A&M Records. It was the band's second album for A&M (after 1994's "Electric Rock Music"), and was produced by the Afghan Whigs' John Curley. "The Known Universe" received favorable reviews from "Spin", "Rolling Stone", and "Details" upon its release. "Trouser Press" Vickie Gilmer, however, was less favorable, writing of the album that "Sounding like slapdash country kin of the Barenaked Ladies, the Ass Ponys retread familiar soil, relying on exhausted film jokes ("God Tells Me To")