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  2. Tanzanite - Wikipedia

    en.wikipedia.org/wiki/Tanzanite

    Tanzanite is only found in Simanjiro District of Manyara Region in Tanzania, in a very small mining area approximately 7 km (4.3 mi) long and 2 km (1.2 mi) wide [4] near the Mererani Hills. [5] Tanzanite is noted for its remarkably strong trichroism, appearing alternately blue, violet and burgundy depending on crystal orientation. [6]

  3. TanzaniteOne - Wikipedia

    en.wikipedia.org/wiki/TanzaniteOne

    TanzaniteOne Mining Ltd is located in Block C, Merelani, Tanzania. Merelani is the world's only known source of tanzanite. TanzaniteOne Mining Ltd was founded by Richland Resources, a gemstone development and mining company who were listed on the London Stock Exchanges AIM market (AIM:RLD) in 1994 . In 2014 TanzaniteOne was sold to a private ...

  4. Golconda diamonds - Wikipedia

    en.wikipedia.org/wiki/Golconda_diamonds

    Golconda diamonds are mined in the Godavari-Krishna delta region of Andhra Pradesh, India. Golconda Fort in the western part of modern-day Hyderabad was a seat of the Golconda Sultanate and became an important centre for diamond enhancement, lapidary, and trading. Golconda diamonds are graded as Type IIa, are formed of pure carbon, are devoid ...

  5. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...

  6. Jewellery of the Berber cultures - Wikipedia

    en.wikipedia.org/wiki/Jewellery_of_the_Berber...

    Jewellery of a Berber woman in the Musée du quai Branly, Paris. Jewellery of the Berber cultures (Tamazight language: iqchochne imagine, ⵉⵇⵇⵛⵓⵛⵏ ⵉⵎⴰⵣⵉⵖⵏ) is a historical style of traditional jewellery that was worn by women mainly in rural areas of the Maghreb region in North Africa and inhabited by Indigenous Berber people (in the Berber language Tamazight ...

  7. Stonesetting - Wikipedia

    en.wikipedia.org/wiki/Stonesetting

    A bezel set sapphire. The earliest known technique of attaching stones to jewelry was bezel setting. A bezel is a strip of metal bent into the shape and size of the stone and then soldered to the piece of jewelry. The stone is then inserted into the bezel, and the metal edge of the bezel pressed over the edge of the stone, holding it in place.

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