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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 non-nacreous 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]
The GIA and CIBJO now simply use the term 'pearl' (or, where appropriate, the more descriptive term 'non-nacreous pearl') when referring to such items [26] [27] and, under Federal Trade Commission rules, various mollusk pearls may be referred to as 'pearls', without qualification. [4] A few species produce pearls that can be of interest as ...
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 AGL was established in 1981 for the purpose of standardization of diamond grading based on the method used at the Gemological Institute of America (GIA) and on the nomenclature of color in diamonds as used by the association of Gemological Laboratories in Japan (AGL).
On Wednesday, Matthew Cannon's college-age daughter forwarded him a request from delivery company DHL asking for duties and fees of $45.19 tied to her order from Australian fashion seller I.Am.Gia ...
Scarratt has authored or co-authored articles in many gemological magazines and journals worldwide, and has co-authored two books: The Pearl and the Dragon. A Study of Vietnamese Pearls and a History of the Oriental Pearl Trade, [6] [7] and The Crown Jewels: The History of the Coronation Regalia in the Jewel House of the Tower of London. [8] [9 ...
There are now several professional schools and associations of gemologists and certification programs around the world. The first gemological laboratory serving the jewelry trade was established in London in 1925, prompted by the influx of the newly developed "cultured pearl" and advances in the synthesis of rubies and sapphires. [6]