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A pearl is a hard, glistening object produced within the soft tissue (specifically the mantle) of a living shelled mollusk or another animal, such as a conulariid.Just like the shell of a mollusk, a pearl is composed of calcium carbonate (mainly aragonite or a mixture of aragonite and calcite) [1] in minute crystalline form, which has been deposited in concentric layers.
The Gemological Institute of America (GIA) is a nonprofit institute based in Carlsbad, California. It is dedicated to research and education in the field of gemology and the jewelry arts. [ 1 ] Founded in 1931, GIA's mission is to protect buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality.
The Giga Pearl wrapped in the embrace of a 22k gold octopus. The Giga Pearl [1] holds the record as the largest certified pearl in the world. [2] The pearl weighs in at 27.65 kg (61.0 lb; 975 oz) and measures 39.37 cm × 22.86 cm × 20.95 cm (15.50 in × 9.00 in × 8.25 in), [3] which is four times larger than the Pearl of Lao Tzu (formerly the Pearl of Allah) which weighs 6.4 kg. [4]
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Diamond certified FL (flawless) by the GIA Two diamonds of grade VS 1 and SI 2 respectively. The GIA diamond grading scale is divided into six categories and eleven grades. [2] The clarity categories and grades are: [3] Flawless category (FL) diamonds have no inclusions or blemishes visible under 10× magnification. [3]
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... GIA (1956 W; 1960 S) from Italian Giappone; JAP ...
In March 2007, IGI collaborated with the Tanzanite Foundation to help distribute jewelry certificates using a grading scale called the Tanzanite Quality Scale (TQS), for the gem called Tanzanite, which was discovered in Tanzania in the 1960s.
According to reports from the WIN/Gallup International's (WIN/GIA) four global polls: in 2005, 77% were a religious person and 4% were "convinced atheists"; in 2012, 23% were not a religious person and 13% were "convinced atheists"; [2] in 2015, 22% were not a religious person and 11% were "convinced atheists"; [3] and in 2017, 25% were not a ...