Tri-color
Also referred to as tri-tone, this type of jewelry refers to a piece of jewelry crafted from three different types of metal.
Tri-color tourmaline on matrix from Minas Gerais, Brazil. (Photo: Jeff Scovil)
Chemical Composition and Crystallography
Tourmaline is a complex borosilicate of aluminum, containing variable amounts of alkali metals, calcium, iron, and manganese.
TRI-COLORED GEMS - Specific gems that have three distinct colors because they formed near various minerals which colored a specific area of the original crystal. An example of a tri-colored gem is a "watermelon tourmaline." ...
Tri-Color Tourmaline (photo: Jeffrey R. Smith)
Pink and lilac hues in multi-colored tourmaline could also be due to the presence of lepidolite which is a phyllosilicate mineral of the mica group, and a secondary source of lithium.
Many items are also available in two-tone gold or Tri-color gold. 1 DWT is equivalent to 1.555 grams of gold.
aka Candy Jade, Rainbow Jade, Tri-Color Jade
Each strand includes dyed beads in an assortment of delicious fruit shades, such as raspberry, black cherry, apricot and green pear.
Tri-color rings are also in vogue. You can get a ring made of three different metals interlocked to give an appealing look. Engraving the initials of your would be spouse on your wedding band is a special way of expressing your feelings and love.
Some faceted tourmalines show color changes from top to bottom. Most often these stones are cut into long, rectangular shapes and may display two or more color changes down their long axis. They are usually called bi-colored or tri-colored stones.
Under her direction, 'Liberation' jewels were also created during the German occupation of France as a subtle tribute to the French Resistance. Tri-color birds in cages represented France locked in the Nazis' grip.
amount of more interesting material is being found. Two main features are notable in high value rough collected from this location: 1) strong body colors ranging from pinks and tans to oranges, greens and reds as well as bi- and tri-colors, and 2) ...
 See also: Color, Stone, Jewel, Jewelry, Gemstone
  
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