| | Turquoise - Native american indian jewelry (Site not responding. Last check: 2007-10-19) |
 | | Turquoise is a robin’s egg blue gemstone that is probably one of the oldest gemstones known. |
 | | Chemically, turquoise is a hydrated phosphate of copper and aluminum and is formed by the percolation of meteoric or groundwater through aluminous rock in the presence of copper. |
 | | The Cerrillos Turquoise mine was formed at the base of a volcano, and, because of the minerals in the rocks formed, a variety of colors developed with 75 colors identified (from tan to khaki-green to blue-green, to bright, light colors with the turquoise being a very hard stone that polishes well. |
| www.southwestgems.com /mall/Turquoise-jewelry.htm (2412 words) |