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
Mariano S. Bishop Mariano S. Bishop Mariano S. Bishop (November 14, 1906 – January 2, 1953) was a labor organizer and union leader who served in turn as principal Organizer, Director, and Executive Vice President of the Textile Workers Union of America. Bishop (his last name being an anglicized version of Bispo) was born November 14, 1906 on the island of São Miguel in the Azores and grew up in the south end of Fall River, Massachusetts, where his family brought him as a young child. In his twenties he starred with Ponta Delgada, an amateur soccer club based in Fall River, which