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Diamond reports from GIA (as well as other, for-profit sources) are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 mg), and almost always for over 1.0 carat (200 mg), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer.
The diamonds sold at Worthy.com are graded at the Gemological Institute of America (GIA) or at the International Gemology Institute (IGI). The brand-named watches are authenticated at CentralWatch. Prior to auction, Worthy.com makes available the item's photographs and diamond grading report to the networks of pre-selected professional buyers.
Gemological Institute of America (GIA) was the first laboratory in America to issue modern diamond reports, [32] and is held in high regard amongst gemologists for its consistent, conservative grading. Diamond High Council (HRD) Official certification laboratory of the Belgian diamond industry, located in Antwerp. [33]
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]
For the next few years he worked to promote the need for gemological education and train a new breed of "certified" jewelers. These jewelers would form the foundation of the Gemological Institute of America (GIA), [1] and later the AGS. In its history, the AGS has achieved significant accomplishments within the field of gemology and jewelry.
About 80% of mined diamonds are already used for industrial purposes, as they might lack the quality to become gemstones that can be set into jewelry.
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