|
Tourmaline Gemstones Buying Guide |
|
|
|
Tourmaline is a large family of Gemstones with more than 100 hues available.
Its name comes from the
Chrome Tourmaline
Chrome Tourmaline is a rare variety of Green Tourmaline that is found only in Kenya, Zambia, Namibia and Tanzania. The finest Chromes rival the top color of Emerald and offer a more durable stone for jewelry. Chrome Tourmaline's vivid Green color is determined by the presence of Chromium or Vanadium oxides. Chrome Tourmaline was first mined in Tanzania in the 1960's. One of the largest crystal chambers was uncovered by accident in Namibia when an explosives expert shot off excess dynamite. Gem quality Chromes are extremely difficult to locate. Stones over 3 Carats are considered very rare in this Gem. All of our stones are well faceted and eye clean. A very rare Gem with a great investment potential! Green Tourmaline
Green Tourmaline is the most recognized of the Tourmaline colors. Green Tourmalines are typically eye clean stones. Most are cut in the rectangular shapes. Shades range from a pastel Green to a deep, vibrant Green. Indicolite Tourmaline
Indicolite is the proper name for Blue Tourmaline. One
of the finest Indicolite colors
are in the medium dark Blue range, close to the color of kashmir Blue Sapphire.
Recently another Indicolite find in
the Mulungu mine, and
Alto dos Quintos mine, in Rio Grande do Norte State, Brazil, have produced
limited quantities of
various shades of turquoise blue-green material, similar to
the color of Paraiba (below), but not as vivid a color due to a lower copper
content. These turquoise blue-green colors demand a higher premium
than some of the Blue Indicolite, but should not as high as Paraiba, which only
comes from the Paraiba mines. Our source
for fine Indicolite Tourmaline is Brazil, and Sri Lanka (formerly Ceylon), both
are known for producing
the finest varieties of Tourmaline. Other sources for Indicolite are Madagascar, California and Maine.
Paraiba Tourmaline
Paraiba Tourmaline is another of the world's most unusual Gemstones. At first it was called "Electric" then "NEON." This new gemstone was discovered in Brazil in 1982. It's brilliant blue and green are more vivid than any ever seen before. The term "NEON" accurately describes the tone of color. It is so vivid it will shock you with its beauty. You can see this stone from across the room! These vivid turquoises, electric blues, rich twilight blues, and neon greens haven't been seen with any consistency in any other gemstone variety. The only Tourmaline in the world that contains Copper, but a recent study by the German Foundation for Gemstone Research also discovered a surprisingly high gold content, 8.6 parts per million, If it wasn't for the fact they were so beautiful, they could have been in danger of being crushed for the gold salvage! This gem was found only in one "football field" size spot in the world, its location is near a village called São José da Batalha, in northeastern Brazil, in the state of Paraiba. Another new find was discovered in 2001 at the Edoukou (Indoukou; Edoko) Mine, located near Llorin, which is in the Oyo State of Nigeria, Africa. The African material has the same exact composition as the Brazilian find, and leading gemologists have been unable to see the difference in the top quality gemstones. Production is very sporadic in both locations, and does not keep up with the strong market demand. These mine shafts are hand-excavated tunnels up to 60 meters deep and the paraiba tourmaline is found only in very thin veins. So even with the new find, this means the supply will always be limited and paraiba always be very rare and expensive. Retail prices are around $10,000 to $15,000 per carat for fine 2 carat specimens, and over $20,000 per carat for the fine 3 to 4 carat specimens, but even that is very little when you realize how rare these gemstones are. Diamonds are quite common in comparison. The prices for Paraibas are not the standard by which other Tourmalines can be measured. The price per carat reflects the size, clarity, color and the intensity of the particular shade. Neon Paraiba Tourmaline is an attractive, highly desirable Gemstone which should be purchased when you can. The most desired colors have been the shades of clear bright greenish Blue or bluish Green; pure Green; or the medium intense Blue. Naturally variations of tones create exciting "Neons." Stones are usually transparent with minimal inclusions. This rare Gemstone is a definite winner! Pink Tourmaline
Pink Tourmaline has become a favorite for mounting because it is available
in so many shades, ranging from pure light Pink to intense "HOT" Pink to
orangy-Pink and Fuchsia Pink. Gemologists think that natural irradiation
produces the Pink, Red and Violet colors in Tourmaline. To enhance
the color to get the very HOT Pinks, you can expect it to be Cobalt treated.
The darker reddish colors tend to have more natural inclusions than the
other Tourmaline colors because they are formed near the center of the
crystal pocket and receive more stress and pressure during formation.
Rubellite Tourmaline
Called Rubellite because the deepest shades appear to be Ruby-like RED. Like all tourmalines, it has strong pleochroism. Eye clean Rubellite is one of the most expensive of the Tourmalines since most Rubellite has visible inclusions. Clean Rubellite is very rare, so if you see a super clean stone it's probably a Pink Tourmaline or a Rubellite Garnet. Rubellite's intense RED color makes it a beautiful Gem for mounting. Colors range in Rubellite from Fuchsia to maroon Red to Red. The price of Rubellite goes up dramatically as the size increases or the Red deepens in intensity. There have been no new stocks of clean Rubellite Tourmaline on the market for several years. Expect it to continue to move upward in price. Watermelon Tourmaline
Sometimes the mineral deposit in the Tourmaline crystal will form a color
band along its length or width which will then be appropriately called
Bi-color, Tri-color or Watermelon if the colors are Green and Red with
a White separation. The vast majority of the stones are obscure or heavily
included. Clean Gems are much more expensive.
|
|||||||||
|
|
|
|
|
|
|||||
|
||||||