|
|
Build Your Online Product Catalogs?
| Product Name: |
Tourmaline Group
|
| Supply Ability: |
more ten thousands ton |
| Related proudcts |
|
| Specifications |
more |
| Price Term: |
|
| Port of loading: |
|
| Minimum Order |
|
| Unit Price: |
|
|
Most people consider tourmaline to be a single mineral. But in fact it is a group named for several different, but closely related minerals. Members of the Tourmaline Group are favorites among mineral collectors. Their rich and varied colors can captivate the eye. Even the black opaque tourmalines can shine nicely and produce sharp crystal forms. Tourmalines are cut as precious gems, carved into figurines, cut as cabochons, sliced into cross-sections and natural specimens are enthusiastically added to many a rock hound's collection.
There are many unique properties of tourmalines. First, they are piezoelectric which means that when a crystal is heated or compressed (or vibrated) a different electrical charge will form at opposite ends of the crystal (an electrical potential). Conversely if an electrical potential is applied to the crystal, it will vibrate. Secondly they are pleochroic which means that the crystal will look darker in color when viewed down the long axis of the crystal than when viewed from the side. This property goes beyond the idea that the crystal is just thicker in that direction. Even equally dimensioned crystals will demonstrate this trait. This property can be used as an advantage by gem cutters who may wish to enhance a crystal's pale color or weaken a strongly colored crystal.
The four most common and well known tourmalines are distinguished by their color and tran***rencies. Elbaite is the gemstone tourmaline and comes in many varied and beautiful colors. It is tran***rent to translucent and is highly prized as minerals specimens and as gemstones. Elbaite is easily the most colorful of all the gemstones.
The iron rich schorl is the most abundant tourmaline and is black and opaque. It is a common accessory mineral in igneous and metamorphic rocks and can form nice crystals. Although too opaque to be used as a gemstone, schorl is used as an ornamental stone when found as inclusions in quartz, a stone is called "tourmalinated quartz". Usually when someone refers to tourmaline |
| Company: |
Great Wall Mineral
|
| Contact: |
Mr. lenny sun |
| Address: |
2208, 4th Building, Renhe Jiayuan£¬28 East Huai'an Road |
| Postcode: |
050000 |
| Tel: |
86-311-86128822 |
| Fax: |
86-311-86126662 |
| E-mail: |
|
|
|
|
Home
