JewelsForMe.com

Tanzanite Science

tanzanite-how-to-care-gemstone.jpg

Tanzanite rates a 6.5 on the hardness scale and has vitreous luster. It is a relatively soft and brittle stone, nowhere near as hard as a sapphire or a diamond, but given the proper care it can last a long time.

tanzanite-lavendar-color-birthstone.jpg

The typical color of tanzanite is blue with a violet tinge. In some lighter colored stones, the color is described as lavender. The color of the tanzanite is the most important factor in determining its price. For example, a tanzanite of the perfect blue brilliant hue in 5, 10 or 20 carats is of greater value than a paler, darker, or duller stone of twice the size and weight.

tanzanite-birthstone-gemstone-heat.jpg

In nature, tanzanite only sometimes occurs as a blue stone, but more often is golden to brown in color. After some time, it was discovered that by heating the brown or golden variety of the stone to 600 degrees Celsius and gradually cooling it, the color could be permanently changed to the violet-blue color. Without heating, tanzanite would be unmarketable.

tanzanite-gemstone-birthstone-facts.jpg

Tanzanite is pleochroic, meaning the purple, gray, blue and violet tones within the stone vary depending on the angle the stone is viewed from. There might also be a slight color change in incandescent light, when stones may appear to be more violet. Tanzanite’s color is caused by the amount of chromium present in the stone.

tanzanite-fragile-birthstone.png

Tanzanite’s rich, royal velvety blue resembles the precious Kashmir sapphire. Only a hint of violet and a slightly less hard and lustreous appearance than sapphire, tip off experts that the stone is something else. While at one point in time, tanzanite was used as a less expensive alternative to sapphire; it is now appreciated far more for itself and far less as a sapphire substitute. Tanzanite is much softer and fragile than sapphire and can occasionally shatter. It is important therefore, if you are having your tanzanite repaired or cleaned, that you make it clear that it is a tanzanite stone so extra care may be taken.

tanzanite-gemstone-facts-birthstone.jpg

Tanzanite is often round or oval cut. It is a stone that normally has few inclusions, but as in all gem stone families, large, clear, nearly flawless tanzanites are rare. The larger the stone, the greater the chance of flaws occurring.

tanzanite-rare-gemstone-facts.jpg

Being little known and of very recent history, this stone has neither been imitated nor produced synthetically. Tanzanite’s fire factor, especially that of the splendid blue color, is comparatively high, for this reason the tanzanite alone of all the zoisite family can be classed with any other splendid gem. Tanzanite is a rare gem likely to gain in value as a collector’s item.

origin-of-tanzanite-gemstone.png

Tanzanite occurs in schists and gneisses as well as in metasomatic rocks together with garnet, vesuvianite and actinolite. It is also occasionally found in hydrothermal veins. Tanzanite is found in very limited quantities, almost exclusively in the northern part of Tanzania, near the Merelani hills, where the chief deposit is almost exhausted by now. However small amounts of tanzanite has also been found in Sweden, New Hampshire, Pakistan, South Africa, Kenya, Norway, Austria, and Italy.

how-to-take-care-of-tanzanite.jpg

Care must be taken when setting or handling a tanzanite. The stone is soft and brittle so it can crack if one is not careful. It is also important to avoid exposure to sudden temperature changes or heat. Tanzanite is also sensitive to pressure and has a low resistance to ultrasound so it should never be cleaned with the ultrasonic cleaners commonly used by jewelers. It can suffer irreparable damage. In general, tanzanite should be worn with care.

Are you a tiger or a dragon? An falcon or a goose? And if you were a tree, what kind of tree would you be?
What does your birthdate say about you? Just select your birthday, and find out:
December learn about Tanzanite
Did you know that tanzanite was discovered by the Masai tribes of Africa, and is only found in one place in the world? Explore our collection of information about tanzanite and tanzanite jewelry. Discover the cultural and religious history of tanzanite, the physical properties of tanzanite, and learn how to care for your tanzanite jewelry.
Create a Keepsake
Combine Tanzanite with any gemstone to create your own unique family keepsake with the birthstones of your loved ones, or your favorite combination of colors.
Combine Tanzanite with: 
January Birthstone icon
February Birthstone icon
March Birthstone icon
April Birthstone icon
May Birthstone icon
June Birthstone icon
July Birthstone icon
August Birthstone icon
September Birthstone icon
October Birthstone icon
November Birthstone icon
December Birthstone icon
select a gem ↑
Select a gold color: