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Light blue to bluish green: Brazilian indicolite variety (from indigo) Green: Brazilian verdelite variety (from emerald ) Watermelon tourmaline is a zoned variety with a reddish center surrounded by a green outer zone resembling watermelon rind , evident in cross-sectional slices of prisms, often displaying curved sides.
Crystals may be green at one end and pink at the other, or green on the outside and pink inside; this type is called watermelon tourmaline and is prized in jewelry. An excellent example of watermelon tourmaline jewelry is a brooch piece (1969, gold, watermelon tourmaline, diamonds) by Andrew Grima (British, b.
The company moved its primary stock market listing from the London to the New York Stock Exchange on 11 September 2008, changing its name to Signet Jewelers Limited in the process. [6] The firm moved its country of domicile from the United Kingdom to Bermuda on the same day, [ 7 ] although it retains headquarters in Akron, Ohio. [ 1 ]
The company was founded in 1960 by Arunkumar Mehta and his cousin Bhanuchandra Bhansali. In the 70’s the company headquartered in Antwerp, Belgium and expanded its operations to several other diamond centers. [12] [13] In 2005 Rosy Blue became a founding and certified member of the Responsible Jewellery Council. [14] [15]
Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]
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