- Tourmaline is a
crystal silicate mineral compounded with elements such as aluminium,
iron, magnesium, sodium, lithium, or potassium.
- Tourmaline has a
variety of colors, Usually, iron-rich tourmalines are black to
bluish-black to deep brown, while magnesium-rich varieties are brown to
yellow, and lithium-rich tourmalines are almost any color: blue, green,
red, yellow, pink etc.
- The name comes
from the Sinhalese word "turamali" or "toramalli", which applied to
different gemstones found in Ceylon.
- The tourmaline
mineral group is chemically one of the most complicated groups of
silicate minerals. Its composition varies widely because of isomorphous
The complex color zoning of the
polychrome tourmaline reflects a dynamic multistage crystallization
Granitic pegmatites typically
are not rich in Ca,and any amounts present may be consumed by the early
crystallization of plagioclase and Ca-bearing tourmaline.
composition of gem tourmaline,
chemical data were also obtained for several samples from other
localities that are known or suspected to produce liddicoatite
Afghanistan is blessed to have some of the most
plentiful reserves of gem and semiprecious stones in the world,
including emeralds, rubies, tourmaline, lapis lazuli, kunzite and
A newly discovered deposit of
yellow and yellow-green tourmaline produced about 1,000 carats per
Gemstone sales were expected to
remain stable or show a slight increase in 2002, although demand for
aquamarine and yellow tourmaline was expected to be strong.
Tourmaline compositions have
long been used as a useful exploration guide in several types of
economically important ore deposits.
Black Tourmaline is a great stone for travelers. It will help keep jet
lag and time disorientation at bay and, placed under your pillow, it
will bring restful, easy sleep.
leg injury that needs casting, see if your doctor will embed a piece of
Black tourmaline in the plaster to aid in healing. Its grounding energy
will also make it easier to get around while you are injured.
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