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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]
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 ...
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]
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.
A man and two children sifting for diamonds in Sierra Leone in 2004.. The United Nations imposed sanctions against UNITA in 1998 through United Nations Security Council Resolution 1173, however investigators led by Robert Fowler presented the Fowler Report to the UN in March 2000, which detailed how the movement was able to continue financing its war efforts through the sale of diamonds on the ...
English: "1776 Commission—comprised of some of America’s most distinguished scholars and historians—has released a report presenting a definitive chronicle of the American founding, a powerful description of the effect the principles of the Declaration of Independence have had on this Nation’s history, and a dispositive rebuttal of reckless “re-education” attempts that seek to ...