2,74 cts Tanzanite naturelle certifiée HKD coupe ovale bleuâtre-violet VVS (Tanzanie)

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Vendeur: captej2012 ✉️ (874) 100%, Lieu où se trouve: Canyon Country, California, US, Lieu de livraison: WORLDWIDE et de nombreux autres pays, Numéro de l'objet: 273810326373 2,74 cts Tanzanite naturelle certifiée HKD coupe ovale bleuâtre-violet VVS (Tanzanie).

2.74 cts HKD-Certified Natural Oval-cut Bluish-Violet VVS Tanzanite (Tanzania)

New without Tags.  This gem has never been used/placed/set in a setting.  It is utterly undamaged, unmarred and in perfect condition as expected of NWOTags.

I have included a Tanzanite article below for your appreciation and enjoyment.

Summary of below:  "Tanzanite is usually heat-treated to enhance its blue and violet colors.  Most rough crystals show a large proportion of brownish-yellow tints, which vanish when heated to 752-932 degrees F (400-500 degrees C).  All reputable gem traders declare such enhancements, however routine they may be."

Type:  Natural Tanzanite  (this Tanzanite is sealed in its HKD-certification document as a package (see photos)) -- captej2012

Color:  Bluish-Violet

Shape:  Oval-cut

Size:  10.82mm x 7.50mm x 4.47mm

Weight:  2.74 cts

Luster:  Excellent

Clarity: VVS

Hardness:  6.5-7.0 rating on the Mohs Scale

Treatment:  Heated, Not Treated, Not Enhanced  (All Tanzanites are Heat-treated. If not heated, it would be so ugly you wouldn't want it.)  --  captej2012

Origin:  Tanzania

The Kids were Young when We called the Sky Big&Blue. When Such are the Sentiments to be Stored in a Stone, What Better than the Blue Depths of a Tanzanite? I brought Big&Blue home to Contain the Moments. Moments when Family was their Only World. When Innocence, a Chance for Wonder. When Laughter, a Note of Joy. When Song, a Lack of Fear. Big&Blue saw My Love drive me in Everything. I Worked and Gave My All for Family. Still could I have Done Better and Provided More? Big&Blue says "Nay, One's Best is All Any Can Do."

We are an eBay eStore enterprise focused on selling mostly Loose Natural Gemstones.  Stay here, look around and learn.  Via eBay Messaging, ask us questions, make an offer, and otherwise discuss your wishes, concerns and hopes.  We pride ourselves as good-spirited folks having fun and doing our best to share the joy of Nature's most beautiful and enduring literal treasure -- Natural Gemstones.  Expect to find us cheerful and trustworthy, and we will expect the same of you.  For us, Negative FeedBack as a means of coercion is never needed and only degrades everyone's enjoyment in what should otherwise be a fun shopping experience.          And finally, please enjoy my work as eBay's First (unofficial) Gemstone Poet.  --  captej2012

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Tanzanite Gemstone Information

About Tanzanite - History and Introduction

Tanzanite is a blue to violet gemstone which is a member of the zoisite mineral group. It was discovered in 1967 by Masai tribesman, Ali Juuyawatu in the hills of Northern Tanzania, which remains the sole source of Tanzanite to this day. Tanzanite was given its name by Tiffany & Co, who promoted the gemstone, resulting in its sudden popularity.

Tanzanite is pleochroic , which means that it shows different colours depending on the viewing angle. In order to get the preferred blue or violet-blue hue, gem cutters must properly orient tanzanite gemstones. The vivid blue of tanzanite can rival fine sapphire and makes tanzanite an extremely desirable gemstone. This attractive colour is so sought after that tanzanite is routinely heated to enhance fine blue and violet hues and minimize the less desirable brownish tones.

Tanzanite; Origin and Gemstone Sources Tanzanite ranges from ultramarine to sapphire blue in colour. It can also appear blue-violet. It is best identified by its refractive index (1.691 to 1.700) and density of 3.35. Its orthorhombic crystal system can also help to distinguish it from some similar gemstones, such as amethyst. Tanzanite exhibits perfect cleavage with an uneven fracture.

Tanzanite is only found in one place on earth; Tanzania, East Africa. The only known deposit of tanzanite is located on a five square mile hilltop at Merelani Hills near Ausha, ten miles south of the Kilimanjaro International Airport in Tanzania.

Buying Tanzanite and Determining Tanzanite Gemstone Value

Tanzanite Colour

Tanzanite ranges in colour from ultramarine to sapphire blue. Under artificial light, it may appear more violet. Tanzanite's pleochroism means that it can appear blue or violet when viewed from different angles. Tanzanite has a higher colour saturation in gemstones of over 5 carats. The most desirable colour for tanzanite gemstones is a deep saturated blue or violet-blue.

Tanzanite Clarity and Lustre

When buying tanzanite gemstones, an eye clean stone should be sought. Tanzanite has an attractive vitreous lustre. Eye-visible inclusions decrease the value of tanzanite, except in the very rare cat's eye tanzanite, which has desirable inclusions  that cause chatoyancy (the cat's eye effect).

Tanzanite Cut and Shape

Tanzanite is mostly faceted in both traditional and fancy shapes and a variety of cutting styles. When cutting tanzanite, lapidarists generally take cost into consideration, which means that tanzanite is often cut into ovals and cushions. The gemstone's main colour depends on the orientation of the cut. Extremely rare cat's eye tanzanite is cut en cabochon to display the desired chatoyancy .

Tanzanite Treatment

Tanzanite is usually heat-treated to enhance its blue and violet colours. Most rough crystals show a large proportion of brownish-yellow tints, which vanish when heated to 752-932 degrees F (400-500 degrees C) All reputable gem traders declare such enhancements, however routine they may be.

  • Condition: Neuf sans emballage
  • Condition: Tanzanite is usually heat-treated to enhance its blue and violet colors. Most rough crystals show a large proportion of brownish-yellow tints, which vanish when heated to 752-932 degrees F (400-500 degrees C). All reputable gem traders declare such enhancements, however routine they may be.
  • Transparency: VVS
  • Shape: Oval
  • Total Carat Weight (TCW): 2.74 cts
  • Length: 10.82mm
  • Country/Region of Manufacture: Tanzania, United Republic of
  • Width: 7.50mm
  • Depth: 4.47mm
  • Country of Origin: United Republic of
  • Treatment: Heating, Not Enhanced, Not Treated
  • Color: Bluish-Violet
  • Natural/Lab-Created: Natural

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