How do you know if tanzanite is heat treated
A top grade Tanzanite will be a deeply saturated brown before heating and a deep blue/violet after heating, while a medium grade Tanzanite will appear lightish brown before heating and a medium pale blue/violet after heating.
Is unheated tanzanite more valuable
Heat Treatment: Impact on Value You might think that would make an unheated blue Tanzanite more valuable, but since it is virtually impossible to tell whether a Tanzanite was heated by the Earth naturally or artificially in a kiln, there is no premium price for unheated blue Tanzanite.
Are all tanzanite treated
All tanzanite must be heated in order to achieve its distinctive blue color; only a very small portion is discovered already blue due to underground heating; the remainder must be heated after mining to get rid of any brown that might hide the blue color.
Is tanzanite usually treated
There have been instances where tanzanite was coated to modify the color. Tanzanite is routinely heat-treated to modify its color from a predominately brownish appearance to a predominately blue to purple appearance.
What is an unheated tanzanite
This stone has blue, purple, and green tones because it is trichroic, which means that each crystal axis displays a different color. A GIA certificate is included. An unheated tanzanite is all natural and untreated, something that is difficult to find.
Is tanzanite irradiated
Roughly 98% of all tanzanite is actually heat treated, and high grade tanzanite very rarely has a brown or green component, and in fact, the green component very rarely becomes blue on heating.
How is tanzanite processed
The gemstone was given the name “tanzanite” by Tiffany & Co. because in its raw state it is colored a reddish brown to clear and needs heat treatment to remove the brownish “veil” and bring out the blue violet of the stone.
Is there synthetic tanzanite
First, while Tanzanite has never been successfully synthesized (a synthetic is a lab-made version of the natural stone that has the same chemical and physical properties as a natural stone), a synthetic form of forsterite has been created in Russia over the past ten years that yields an imitation that looks very similar to Tanzanite
What color should a good tanzanite be
Rich royal blues or vibrant violets to paler shades of violet are the predominant colors of high-quality tanzanites.
What is the current value of tanzanite
The changes occurring in Tanzania make tanzanite a very good investment stone. For richly colored AAA Tanzanite, 1ct is roughly worth $200-$350 per carat. 2ct sizes reach $400-$550 per carat. 3 carats and up will reach $500-$675 per carat.
How do you pick a tanzanite stone
A blue stone with violet accents is thought to be the highest quality tanzanite available. Use the eye-clean standard to evaluate the quality of a tanzanite stone: There should be no imperfections visible to the naked eye. Tanzanite stones with inclusions should be severely discounted.
Is tanzanite better than diamonds
According to some, Tanzanite is similar to diamond, but Tanzanite is at least 1000 times more expensive and rare than diamond.
What are heated gemstones
Without heat-treated gemstones, it would be difficult to find fine gems in the most sought-after hues. Heat treatment is the process of subjecting a gemstone to high temperatures in order to change its color and improve its clarity.
What is the natural Colour of tanzanite
Due to the gems strong pleochroism, fashioned examples typically display a mixture of both blue and violet colors in a wide range of tones. Tanzanites color can be a very bright, intense blue. In exceptional tanzanites, the color is an intense violetish blue with red flashes of pleochroic color coming from within the stone.
Is tanzanite a real diamond
All of the worlds tanzanite is mined from a single area in Tanzania, which is only 8 square miles (20 square kilometers), close to Mount Kilimanjaro. If rarity increases a gemstones value, tanzanite might be prized for that fact alone.
Can tanzanite be green
Very yellowish green stones (ones that are almost more yellow than green) are called “Combat Color” by the miners and are not as rare or as valuable as more pure green stones with less of a yellow modifier.
Is there brown tanzanite
In its unheated form, Tanzanite appears dull gray and brown, but is universally heat-treated to produce purplish-blue hues, with the exception of the few stones that yielded Tanzanites discovery. Because heat treatment of Tanzanite is universal, unlike most other gemstones, it has no impact on the stones price.
Can you heat treat Topaz at home
The topaz can be heated by being wrapped or buried in an inert material, such as clean, dry sand, and then being slowly heated to the treatment temperature; the larger the stones, the slower the heating rate that needs to be used.