Tuesday, December 31, 2013

Rubellite Tourmaline

Tourmaline is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium.

The tourmaline mineral group is chemically one of the most complicated groups of silicate minerals. Tourmaline comes in a wide variety of colours.
There are red and pink tourmalines in many varieties, however, only a very few of these are entitled to call themselves 'rubellites'. The name comes from the Latin 'rubellus', which means reddish. Rubellites are not merely red or vivid pink tourmalines. There is an important criterion. Many gemstones change their colour depending on the light source. A true rubellite does not. It shines just as intensely in artificial light as it does in daylight. The colour of most other pink or red tourmalines, by contrast, displays a visible touch of brown in artificial light.
Rubellites are found in abundance in Brazil, Mozambique, Nigeria, Madagascar and Pakistan. There is also a rubellite mine in the USA. Today rubellite tourmaline is one of the most popular semi-precious gemstones available.

A large portion of rubellite tourmaline gemstones in the market have been treated through heating and irradiation.