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Understanding the Color Grading System for Tanzanite

by Gemos Gems 4 months ago in Science

Color Grading System for Tanzanite

Tanzanite is unique among gemstones, but like diamond and other valuable stones, it is evaluated through a standard grading system. This system is important in deciding the worth of every individual Tanzanite however it is additionally significant for a purchaser's peace of mind. Each tanzanite adornments creation is accompanied by a Certificate of Authenticity, which represents the stone's qualities along with an Ethical Compliance Certificate affirming that the Tanzanite was mined in an ethical way. Tanzanite is also popular for its trichroic nature. The rich blue shade of tanzanite is excellent and like no other blue. The most demanded color for Tanzanite is a vivid blue encompassed by a delicate trace of purple, which has an incredible impact in all sizes, yet more so in sizes more than 10 carats. While larger stones will showcase the more dynamic tones, the smaller stones showcase pastel shades. Tanzanite seems bluer during the sunlight, while in dark, you can see the red blazes all through the stone.

Ordinarily, tanzanite color grades are divided into a range of colors from blue violet to violet blue on the basis of color and saturation. While the rich color has more higher worth, tanzanite with moderate to light shade is as yet attractive and sometimes preferred by specific buyers. At the point when you add a fine cut to rare stone with a surprising feature of shading like tanzanite, it makes a gem of incredible magnificence without fail. But not all tanzanite is valuable. The principal determinants of tanzanite value, similar to all colored gemstones, are color, clarity, cut and carat weight. In tanzanite’s case, Color factor is critical to such an extent that it overweighs practically any remaining characteristic. On the other hand, GIA delegated Tanzanite as a Type I gemstone, implying that tanzanite specimens are typically eye clean. So, clarity is rarely an issue with tanzanite. In any case, the color range can be very wide, since tanzanite occurred in green, violet and blue. The Saturation is likewise profoundly factor, with certain rough crystals tends to be quite pale.

Assessing tanzanite grade is vital. Surprisingly, there is no accepted standard for tanzanite grading. Since you have often heard about "AAA Tanzanite" but there’s nothing like this in the gems trade. Since it is absolutely impossible to measure the difference, one of the advantages of this grading system is it helps in clarifying why certain colors are graded higher than others. On the other hand, many traders grade Tanzanite colors using terms like ‘exceptional’, ‘vivid’, ‘intense’, ‘moderate’, ‘light’ and ‘pale’, and grade tone as ‘violetish blue’ or ‘pale blue violet’.

Color Grading of Tanzanite:

Natural AAAA:

These are the top 10% of all natural Tanzanites with an extraordinary blue tone and purplish color. These are often "eye-clean". These gemstones are extremely rare. This quality is ordinarily utilized in fine jewelry.

Natural AAA:

These are the top 20%-30% of natural Tanzanites available with a medium violet-blue tone with slight dim shades. This quality is ordinarily utilized in fine gems by small jeweler/family gem dealers.

Natural AA:

These are the top 50-75% of natural Tanzanites available with violet-blue tone with dark hints. This quality is commonly utilized in fine jewelry by small jewelry shops.

Which is the best grade?

Gemstones are basically classified based on natural flaws (generally apparent in them) in them. A ‘Type I’ gemstone is extremely perfect, without any inclusions (primary blemishes). A ‘Type III’, on the other hand, has clear flaws. Since Tanzanite is a Type I gemstone, it is relied upon to be noticeably perfect. Utilize the eye-clean standard to check the nature of a tanzanite: There ought to be no defect noticeable to the naked eye. Tanzanite stones with inclusions ought to be profoundly limited. A blue stone with violet tinge is presumed to be the greatest tanzanite.

Despite the fact that there are less AAAA Tanzanites available and many dealers price them over all others, they do come with higher price tags because of their shortage. They generally don't offer as much pleochroism as lighter grades will. Therefore, many individuals will focus on AAA grade as it is generally an incredible compromise between the darkest tones of an AAAA, and the more feminine pinks and purples you will find in the AA grades. On the other hand, the color stability in tanzanite is universally acceptable. Heat treated stones hold their shading and are probably not going to blur under the ordinary light exposure and in the temperature range of the human climate. Similarly as with all other precious stones, contact with acids and different synthetic substances ought to be kept away as stone might get scratched or damaged. In the case of cleaning is required, warm water and a gentle cleanser are suggested. Steam and ultrasonic cleaning are strictly not recommended.


We suggest you to be exceptionally cautious about online sites or sellers claiming to offer AAA investment grade tanzanite as many have lower grade gemstones. Any rating above AAA doesn't exist! That’s only the advertising trick of online Tanzanite advertisers showing a plenty of "A's" as well as "+ signs" like AAAA, vB6++ or AAAA++ and more trying to mark their gemstones more attractive despite the fact that the color is certainly nowhere close to the true finest grades. Demand a non-affiliated 3rd party certification related to the shading and clarity of a Tanzanite gemstone. Less than 1% of all natural Tanzanite production is intense AAA quality and considered extremely rare. For a colored gemstone (any gem other than diamond), shading is the main factor in deciding quality. The best and most profound shades of Tanzanite are generally found in gemstone sizes more than 5 carats as per the Gemological Institute of America (GIA). If you’re planning to buy Tanzanite ensure that it has been graded by an Independent Gemological Laboratory (not a research facility controlled by the seller) and accompanies an authenticity declaration which will provide information about the gemstone.


Gemos Gems is one of the leading providers of loose gemstones and colored gemstone jewelry. We aim to provide high quality, handmade gemstone jewelry.

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