Tanzanite

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Tanzanite
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Tanzanite Facts

• 1. Tanzanite was first discovered in 1967 in
  Tanzania.
• The gemstone was discovered by a man named Manuel
  De Souza, an Indian tailor who had travelled to
  Tanzania to search for gemstones and gold. It is
  said that he was walking through the foothills of
  Mount Kilimanjaro when he spotted something
  glistening in the ground. He deduced that the
  stone was too soft to be sapphire, and it was
  later categorised as a variety of the mineral
  Zoisite.

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2. It is a rich blue variety of Zoisite.

• The rough form of tanzanite is a reddish-brown
  colour. In order to become tanzanite, the mineral
  must contain traces of Vanadium. The stone needs
  to be heated to 600C for 30 minutes in order to
  transform into the vibrant blue colour that is
  associated with tanzanite. The deeper the blue of
  the tanzanite, the more desirable and expensive
  it will be.

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3. Tanzanite is only mined in Tanzania.

• The gemstone has only ever been found in the same
  place it was first discovered, in the Merelani
  Hills of Tanzania. As the stone becomes more
  popular, miners are having to dig deeper than 800
  metres in order to find it. The mining and
  selling of tanzanite are regulated by the
  Tanzanian government to ensure it remains ethical
  and sustainable. Today, the mines only span
  around 14 square kilometres.

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4. The largest rough tanzanite was found in 2020.

• The largest rough tanzanite ever mined was found
  in June 2020. A man named Saniniu Laizer
  discovered two tanzanite stones, one weighing
  9.2kg and the other 5.8kg. Laizer earned an
  incredible 2.4 million from Tanzanias mining
  ministry for tanzanite. He planned to use his
  profits to build a school and a shopping centre
  to aid his local community.

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5. The largest carved tanzanite is named Lheure
Bleu.

• The piece was created by Naomi Sarna and sits on
  a sterling silver base. It was inspired by the
  winds of the Great Rift Valley. Sarna travelled
  to the tanzanite mines where she found the
  725-carat gemstone that she carved as her entry
  into an international design competition. Sarna
  taught the women in the area how to create
  jewellery using tanzanite so they could sell
  their own creations. The finished artwork won a
  First-Place Spectrum Award from the American Gem
  Trade Association. Naomi Sarna plans to donate
  profits from the sale of the Lheure Bleu to
  the Maasai people for eye care.

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6. Tanzanite is a birthstone for December.

• Tanzanite was made a birthstone for December by
  the American Gem Trade Association in 2002. It
  was the first alteration made to the list since
  1912. This emphasises how new tanzanite is within
  the gemstone industry.

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7. The gemstone is believed to inspire calmness,
compassion, and new life.

• The Maasai tribe reside in the part of Tanzania
  where tanzanite is mined. The people of this
  tribe associate tanzanite with generating
  calmness and compassion. The stone is also
  believed to aid in the creation of new life. It
  is thought that these associations generate from
  the ideas the tribe have around the colour blue.
  The beliefs held about the colour blue are also
  associated with tanzanite due to the deep blue
  colour it holds.

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8. Tanzanite is rarer than diamonds.

• Tanzanite is said to be 1000 times rarer than
  diamonds. This is due to the fact that it is only
  found in one very small area of the world. The
  gemstone was created millions of years ago by the
  same tectonic shift that created Mount
  Kilimanjaro and the Great Rift Valley of
  Tanzania. This once in a lifetime event makes
  tanzanite one of the worlds most sought-after
  gemstones. Some geologists refer to it as a one
  generation gemstone as it is theorized that with
  continued mining, there will be no natural
  tanzanite left to mine within the next decade.

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9. There are many theories as to who first
discovered tanzanite.

• As with any great discovery, there are several
  theories as to who truly first discovered
  tanzanite. The most popular and feasible is the
  tale of Manuel De Souza. However, legend says
  that the gemstone was actually first discovered
  by the native Maasai Cattle Herders after a fire.
  The fire turned the brown zoisite crystals into
  deep blue-purple gemstones.

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10. Tanzanite has a trichroism which makes it
unusual.

• Some crystals, such as tanzanite, have
  trichroism. This means that the crystals exhibit
  a perceptible difference in colour when looked at
  under different lights, or from different angles.
  When tanzanite catches the light in different
  ways, it can appear blue, purple, red, or even
  yellow. This unusual property makes tanzanite all
  the more appealing for jewellers as the finished
  item will be incredibly eye-catching.

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Tanzanite Story

• Tanzanite is the blue and violet variety of the
  mineral zoisite (a calcium aluminium hydroxyl
  sorosilicate), caused by small amounts of
  vanadium. Tanzanite belongs to the epidote
  mineral group. Tanzanite is only found in
  Tanzania, in a very small mining area
  (approximately 7 km (4.3 mi) long and 2 km (1.2
  mi) wide) near the Mererani Hills.
• Tanzanite is noted for its remarkably strong
  trichroism, appearing alternately blue, violet
  and burgundy depending on crystal orientation.
  Tanzanite can also appear differently when viewed
  under different lighting conditions. The blues
  appear more evident when subjected to fluorescent
  light and the violet hues can be seen readily
  when viewed under incandescent illumination. In
  its rough state tanzanite is colored a reddish
  brown to clear, and it requires heat treatment to
  remove the brownish "veil" and bring out the blue
  violet of the stone.

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The gemstone was given the name 'tanzanite' by
Tiffany Co. after Tanzania, the country in
which it was discovered. The scientific name of
"blue-violet zoisite" was not thought to be
sufficiently consumer friendly by Tiffany's
marketing department, who introduced it to the
market in 1968. In 2002, the American Gem Trade
Association chose tanzanite as a December
birthstone, the first change to their birthstone
list since 1912.
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Manufacturing Process Of Tanzanite
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1. Rough Tanzanite From Zoisite Mineral

• In its Rough form, tanzanite is extracted from
  blue zoisite mineral. This mineral occurs in only
  one country in all world- Tanzania, in the
  foothills of Mt Kilimanjaro.
• When the rough tanzanite extracted from the
  ground, its hardness is around 6.5- 7. When the
  rough tanzanite is extracted, its properties such
  as color, size, clarity, and cut are determined,
  to indicate its worth and value. Through a
  dynamic processing, optical and manual sorting
  system, rough tanzanite is prepared for its
  following stages.

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2. Planning Marking Tanzanite

• The most crucial task in the creation of the
  perfect Tanzanite gemstone, this is where
  tanzanite nurtured at the hands of a skilled
  craftsman or a jeweler. The professional plans
  and decides, in consultation with the concerned
  owners, the cut, weight and carat of a precious
  gemstone. Tanzanite will then determine its
  market value. The tanzanite is now ready to be
  cut.

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3. Making Of Pre-Form

• Making of Pre-form is a simple process by which a
  rough tanzanite divided into desired marked
  pieces. This marking is the done perpendicularly
  or against the planes that the tanzanite rough
  needs to be the sawn i.e. 'cut.' As the rough
  tanzanite begins to get cut as per the marking
  process, one side of the stone is cut with a flat
  surface, called the table or flat central facet
  on top of the stone.

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The orientation for further cutting and marking
stone at this stage, the stone is referred to as
a pre-form, and you can see what the final shape
will be.





Once the process of pre-form is completed, the
tanzanite stone is sent back to the planning and
marking department for checking the results of
procedures and then passed on to the next process
of Bruting.
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4. Bruting

• In the process of Bruting, Tanzanites girdle is
  formed. It is called rounding. The girdle is the
  surface which created around the thickest part of
  the stone. The stone again set in a 'dop', which
  is then fixed to the center of a lathe spinning
  at high speed. Using another tanzanite stone set
  in a long 'bruting stick', the corners of the
  rough stone are gradually rounded off until the
  spinning tanzanite is perfectly round at its
  thickest part. After this process, once again the
  quality check is done. If the tanzanite finds
  itself suitable, it moves on to the polishing
  department, the last of all processes.

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5. Polishing

• When the tanzanite is polished, it also undergoes
  through faceting. Polishing is the art of giving
  the final touches to the tanzanite. This process
  also requires an enormous amount of concentration
  on the part of the jeweler- craftsman, as it here
  that the tanzanite given its much-required
  grandeur.
• This step makes the tanzanite into a Faceted
  pieces. The last steps in the manufacturing
  process of the tanzanite from where on it goes to
  the grading department. The grading department is
  where the tanzanite receives its grading as per
  the GIA standards.

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COLOR

• 1.Color depth ranges from pale to brilliant,
• which indicate a higher proportion
• of blue or violet hues.
• 2.If a tanzanites color is a deep
• saturated blue, then it is
• considered more valuable.
• 3.The deeper the color, the rarer and
• costlier the tanzanite.
• 4.Pale tones are more affordable.

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CLARITY

• 1.Clarity refers to any natural defect or
  inclusion present in the tanzanite gemstone.
• 2.Tanzanite clarity ranges from heavily included
  to flawless.
• 3.If the stone is completely flawless it is
  considered more valuable.

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CUT

• 1.Cut refers to various angles and proportion of
  finished gemstone.
• 2.A brilliant cut has properly proportioned
  facets and perfect symmetry.
• 3.Tanzanite is available in various shapes, but
  cushion and oval cuts are most common.

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CARAT

• 1.The carat term is used to measure a tanzanite
  gemstones weight.
• 2.The color of tanzanite appears less saturated
  in smaller size.
• 3.Tanzanite gems must be above 5 carats in weight
  to have fine color.

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Various Of Tanzanite

• 1.Bondi Blue Tanzanite
• 2.Natural Green Tanzanite

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1.Bondi Blue Tanzanite

• Bondi blue tanzanite is one of the
• rarest varieties of this treasured
• gemstone with mixed shades
• of blue and green.
• Tanzanite's incredible rarity and
• beauty have skyrocketed it to
• the highest ranks of the gemstone
• kingdom.

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2.Natural Green Tanzanite

• One of the best kept secrets
• of the tanzanite trade is the
• exceptionally rare occurrence
• of fancy, colored tanzanite,
• like natural green tanzanite.

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TANZANITE - A PRECIOUS GEM

• A gem is only classified as precious, if it
  exhibits 3 essential traits
• . beauty
• . rarity
• . durability
• Beautiful tanzanite is durable, with Mohs
  Hardness ranking of 6.5 to 7 out of 10. This
  single-source gemstone is more than 1000 times
  rarer than diamond.
• Tanzanite is a prized possession in every sense.

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