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1.05 CTS AA+ TANZANITE STONE - WELL CUT [S6372]

3772
14

SKU
Dimensioni (mm)
8.000 x 6.000 x 4.000mm
Peso (cts)
Certified Gemstones
NO
Tipo
Faceted
Colori

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TANZANITE

This is a well cut stone that was cut in Tanzania by experienced cutters ready to be set in jewellery.They are natural stones heat treated.

ideal for re seller or jeweller

Popular purple colour 

Mohs scale 6.5 to 7

Grading VVS

Weight of stone 1.05 cts app 

size of stone 7.5 x 5.5 mm app 

AA+ colour is a very highly saught after colour and just falls short of the ultimate colour (AAA) for this stone. This colour provides the beauty of a high quality Tanzanite at a fraction of the cost.

We have some rough Tanzanite specimens in our sister stores QUALITY ROUGH and MINERAL GEM WORLD where you can see how hard it is to cut clean stones like this out of rough.

COLOUR & GRADING SYSTEMS:
Colour is of course the most important of the 4 C’s when determining the quality of a Tanzanite stone. However, it can also prove very confusing when comparing the stones of one Tanzanite dealer compared to the next, especially if you are looking on the internet, since the differing terminology coupled with often confusing grading systems makes comparison virtually impossible.
As we have already seen there are a multitude of Tanzanite grading systems in use but it should be noted that as yet there is no universally accepted method of grading the stone. Even the world's most recognised laboratories have yet to reach consensus on terms used for grading Tanzanite although the

 

 

 

Tanzanite is an extraordinary gemstone. It occurs in only one place worldwide -Tanzair africa. Its blue, surrounded by a fine hint of purple, is a wonderful colour. Thanks to its unusual aura and the help of the New York jeweller's Tiffany, it has rapidly become one of the most coveted gemstones in the world.

Tanzanite is a blue variety of the gemstone zoisite. It consists of calcium aluminium silicate and is not particularly hard, having a value of 6.5 to 7 on the Mohs scale. For that reason, it should always be worn carefully and never placed in an ultrasonic bath for cleaning or brought into contact with acids.

The deep blue of the tanzanite is fantastic, and runs from ultramarine blue to light violet-blue. The most coveted colour is a blue surrounded by a delicate hint of purple, which has a particularly wonderful effect in sizes of over 10 carats. The well developed polychromaticity of the tanzanite is typical: depending on the angle from which you look at it, the stone may appear blue, purple or brownish-yellow. Having said that, most raw crystals are somewhat spoiled by a brownish-yellow component, though it can be made to disappear by the cutter if he heats the stone carefully in an oven to approximately 500°. During the procedure he must pay careful attention to the moment at which the colour turns to blue. This burning is a method of treatment which is regarded as customary in the trade, but the raw stones must be as free of inclusions as possible, since otherwise fissures may occur. In fact working with tanzanite can sometimes give even the most experienced cutter a bit of a headache, the cleavage of this gemstone being very pronounced in one direction. This exclusive gemstone is cut in every imaginable shape from the classical round shape to a number of imaginative designer cuts.

Type 1 Gemstones
The following gemstones are typically inclusion free, even minor inclusions detract from their value.
Diamond, Amethyst, Beryls(Aquamarine,Morganite), Citrine, Smoky Quartz, topaz, Chrysoberyl, Kunzite, Tanzanite, green Tourmaline, and Blue Zircon
IF Internally flawless under extreme magnification (Very rare)
F Flawless
VVS Minute inclusions under 10x; invisible to the unaided eye
VS Minor inclusions under 10x; usually invisible to the unaided eye
SI1 Noticeable inclusions under 10x; usually visible to the unaided eye
SI2 Noticeable inclusions under 10x; usually quite visible to the unaided eye
I1 prominent- moderate affect on appearance or durability
I2 prominent - severe affect on appearance or durability
I3 prominent- severe affect on beauty, transparency or durability
Type 2 Gemstones
Gemstones that normally have small inclusions that do not detract from value.
Alexandrite, Andalusite, Iolite, Peridot, Rhodolite, Ruby, Sapphire, Spinel, Tourmaline, Garnet, Amethyst, Red Zircon, Tsavorite; Blue, Orange, Purple, Fluorite.Yellow and Parti-colored Tourmaline
F Flawless
VVS Minor inclusions under 10x; usually invisible to the unaided eye
VS Noticeable inclusions under 10x; often invisible to the unaided eye
SI1 Obvious inclusions under 10x; visible to the unaided eye
SI2 Obvious inclusions under 10x; very apparent to the unaided eye
I1 prominent - moderate affect on appearance or durability
I2 prominent - severe affect on appearance or durability
I3 prominent - severe affect on beauty, transparency or durability

 

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sedagems
Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and gems stones he has collected on his many buying trips world wide. All stock has a money back guarantee as your continued business is our business.
Mermaid Waters , Australia
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19061 feedback

  • rustynut
    rustynut
    Positivo

    Good stone great service

  • martin11
    martin11
    Positivo

    Great thank very much, lovely pearls.

  • philsgems
    philsgems
    Positivo

    Nice piece of rough. thankyou

  • philsgems
    philsgems
    Positivo

    Nice stone. Thankyou

  • philsgems
    philsgems
    Positivo

    Have received the rough. Nice colour. Thankyou

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Il programma Gemstone Sheriff consente ai nostri membri di richiedere un controllo su qualsiasi prodotto, che viene completato da un Gemologist indipendente che valuta l'accuratezza della descrizione e delle immagini dell'articolo.

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Tipo di elenco : Standard
Codice prodotto : 258388
Inizia : 18th December 2024 07:00 pm PST
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