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 Tanzanite Gemstone/Jewel in Mererani Tanzania

Tanzanite Authentic identification Consultancies
 

 Tanzania travel,african safaris,kilimanjaro,tours and adventure.

Apart from Wildlife safaris,kilimanjaro climbing and adventure tours we sell Tanzanite. 

We are Registered and Licensed Tour Operator based in Arusha Tanzania East Africa.The Company was establshed 18 years ago by the Tanzanian, born in Kilimanjaro region. Throughout our services,we have gained knowledge and experience. We have maintaained Our high standard services, and we have been recommended in many Tourist/Travel Sites.

 


THat is why we get all class travellers from Senior, Diplomats, Luxury, Business People and Budget Tourists.
Our Services are Mount Kilimanjaro climbing, Mount Meru climbing, Mount Oldonyo Lengai Climbing, Trekks on Ngorongoro Highlands,Wildlife Safaris (game Viewing picnics) to Ngorongoro Crater, To all National Parks, Boat and GAme viewing in Selous Game Reserve, Archaelogical, Museums and Natural Attraction visits to Amboni caves Tanga,War caves in Kalenga Iringa, Bagamoyo Ruins, Bird Watching in Amani Nature Reserve.
Beach Holidays with All Activities ( Scuba diving, Snorkelling, sport fishing, e.t.c) in Zanzibar Archipelago( Unguja and Pemba Islands), Mafia Island, Bagamoyo and Mombasa (Kenya) Island.
We can't dare to skip showing you the enchanting Cultural Heritage example Datoga, Hadzabe and Maasai. These tribes are among the few tribes who have maintained their Ancestral Cultural, Tradition and Customs way Of Life.
Welcome! 

 

Zoisite (Variety Tanzanite)


  • Tanzanite is the important gem variety of zoisite (zoisite is also refered to as epidote)

  • Color is variable. Gem varieties are often sapphire blue or violet blue. However, other colors occur, like the red variety (thulite), and a green variety.

  • Hardness: 6.5-7 (note this hardness is less than normally desirable for a gem used in jewelry subject to abrasion by dirt and dust)

  • Crystal system: orthorhombic

  • Composition: Ca-Al-silicate (tanzanite color is attributed to a Vanadium (V) as an impurity

  • strongly pleochroic

  • View an uncut crystal.

 Where is it found? 

The variety of zoisite known as tanzanite was discovered in Tanzania in 1967.

 

-it occurs in pegmatite veins (inclusions suggest hydrocarbon-rich fluids) .           

-usually heat treated at 400 - 500 C to remove brown tints, deep

 -some cats eye varieties due to channels or nee

 -best orientation for color not same for chatoyancy Clarity is the second most important of the 4 c's when considering Tanzanite quality. Clarity simply refers to how inclusion-free a gemstone is. Once again, the most universally accepted and most documented system is the GIA system but there are also numerous other trade based systems in use. The basic rule with Tanzanite is that it should be at least eyeclean but preferably loupeclean too. Top stones are loupeclean. Below is a chart showing the GIA clarity grading system.VVS : This is the top grade in the GIA system. Tanzanite is classed by the GIA as a "Type 1" gem which means it is graded very strictly. Stands for Very very slightly included and whilst most VVS Tanzanites are flawless they can contain minute inclusions which are difficult to see with a loupe (10x magnification) and invisible to the unaided eye. Typical minute inclusions may be very fine needles, tiny hairline feathers, very faint clouds and percussion marks.VS : This stands for Very Slightly Included and these stones are characterised by minor inclusions which are somewhat easy to see under 10x magnification but usually invisible to the unaided eye. Typical inclusions may be small included crystals, liquid inclusions, fine needles, small feathersSI1 - SI2 : This stands for Slightly Included and these stones are characterised by noticeable inclusions which are apparent under 10x magnification. In SI1 they are usually visible and SI2 quite visible to the unaided eye. Typical inclusions are included crystals, large liquid inclusions, feathers, dense clouds. I1-I2-I3 : The lowest grade. Stands for Imperfect. These stones are characterised by inclusions that have a negative effect on either appearance, durability or both. At I1 there is a moderate effect on either factor, I2 a severe effect on either factor and I3 a severe effect on both factors.In terms of Tanzanite, a top stone must be VVS. Any lesser clarity grade will affect the value downwards and denotes a lower grade stone.            When purchasing Tanzanite there are several factors you need to consider - these are the 4 c's - Colour, Clarity, Carat Weight and Cut.COLOURColour is the most important of the 4 C's when considering Tanzanite quality. It can also be one of the most confusing aspects as you surf the web as so many different sites use different terms/grading systems and it is difficult to effectively compare one with another.COLOUR GRADING SYSTEM.There is only one universally accepted official grading system for coloured gems and that is the GIA system (Gemological Institute of America). However, there are numerous trade based systems as you will see when surfing the web. The majority of these are very subjective and vary widely. One of the terms commonly used (and misused) in the trade is AAA Tanzanite. This is a term used by the miners to denote the very top grade of Tanzanite - the very deeply saturated exceptional stones.Below is a suite of Tanzanite loosely representing the colour grades as they descend. We have used the GIA system but included some of the other trade grades often used to help with comparison purposes.Of course there are many other colours which fit in between these but it serves as good basic guide to colour.

Fancy 1
 CONSUMER PROTECTIVE NOTE;
 Whilst many sites proclaim to be selling AAA stones from Block D, most are actually dealing in the A range. Prices are considerably lower for this material and it has become a marketing ploy to represent lower cost material as AAA (bV 6/5 vB 6/5) at low prices. True block D AAA material is very rare and difficult to get. Less than 1% of all Tanzanite production is true AAA and it is considered exceptional. It is thus at a premium price right from the mouth of the mine to the very few highly selective and high end jewelers who have access to it. Beware of sites offering this exceptional material at prices too good to be true. Chances are you will be buyng a grade to several grades lower. This is fine as even lower grade Tanzanite is very beautiful, but it shouldn't be misrepresented as AAA.

 

CARAT WEIGHT. Tanzanites exist even in the 100+ carat range but these are rare. Generally stones are in the below 1 - 10 carat range. Carat weight affects the price generally as weight increases stones in the same quality bracket will cost more per carat.

 

CUT.Although it has the least impact on value of the 4 C's cut is still important. In the market, tanzanites are found in a variety of shapes and cutting styles. Ovals and cushions are the most common, but rounds are also seen, as are other shapes, including emerald cuts, trillions, etc. Cabochon-cut tanzanites are not often seen. Cuts should be proportional - you don't want to pay for a stone with alot of weight in the pavilion for example when this weight will be invisible in a setting. 

 

OTHER CONSIDERATIONS.FAKES / SYNTHETICS / IMITATIONS : Tanzanite has never been synthesized, but a number of imitations exist. The most common is blue-violet glass. A synthetic fosterite has also been used as an imitation and is known as Tanzanique in the trade. It has a lower RI than Tanzanite and does not have the same pleochroism so is easily distinguished from the real thing. However, laymen can easily be fooled so always buy from a reputable dealer, preferably a member of the ICA (International Colored Gemstone Association) which has a strict code of ethics. ENHANCEMENTS : Virtually all gem tanzanite of a blue violet color has been heat-treated to enhance the color. In the rough state most Tanzanite is predominantly brown. Heating at 500 to 600 degrees centigrade causes this colour to change to blue. This is a permanent and stable change.LIGHTING : A great deal of Tanzanite marketing makes a big deal of the "red flash" phenomenon of Tanzanite. This is one of the features of the stone and is due to Tanzanite's trichroism. Tanzanite is extremely light sensitive, with incandescent lighting (yellow lighting found in common light bulbs) tending to shift its color to the violet side causing the red and pink flashes to appear within the stone. The 2 images below of the same stone show it under white (daylight) and under incandescent light: Under white light

 

  Under incandescent light         

 AFTER KNOWING ALL ABOUT TANZANITE, LET’S TALK ABOUT PURCHASE.

WE WILL TALK ABOUT PURCHASE IN TERMS OF WHERE TO BUY IT, FRAUDLENT AND HOW TO SHIP IT.

 

 MOST OF PEOPLE IN TANZANIA ARE HONEST, ALTHOUGH THERE SOME RARE CASES OF FRAUD PRACTISED.THESE FRAUD CASES ARE MAINLY BROUGHT TO TANZANIA BY WESTERN AFRICA COUNTRIES(SENEGAL, NIGERIA), AND WESTERN COUNTRIES. I HAVE HEARD THAT TANZANITE IS EVEN MADE IN LABORATORIES. SO IT IS MY ADVICE TO BUY GENUINE TANZANITE FROM REGISTERED AND LICENSED DEALERS.

IN TANZANITE, BUYING TANZANITE IS SIMPLE AND NO MUCH THREATS OF BUYING FAKE TANZANITES.

 

THERE ARE A NUMBER OF TANZANITE DEALERS WHICH MOST OF THEM HAVE MINING BLOCKS IN MERERANI AREA ARUSHA. THESE CONDUCT TANZANITE MINING, CUT AND SELL THEMSELVES. THIS IS A BIT BETTER PLACE TO BUY TANZANITES JEWELS.

THE DEALERS ALSO USE SPECIAL METERS TO MEASURE AND RECOGNISE GENUINE TANZANITE.

 

FROM THESE DEALERS YOU CAN BUY TANZANITES AT REASONABLE PRICES AND GET BETTER DEALS.

 

NO NEED TO GET HEADACHE AND CONFUSION, WE ARE YOUR CONSULTANCY. WE KNOW ABOUT TANZANITE.

 

WHEN YOU COME TO TANZANIA, CONTACT US.

Email; jadventurestanzania1999@yahoo.com

 

                            

 

 





 

 

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