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      The HPHT process has been commercially available for the last five years and this has increased awareness among jewelers of different diamond types. In most cases jewelers will find clear indications of types by using both the SSEF spotter and the crossed polarization filter. A distinctive flat shape in a rough diamond is also indicative.

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      GIA collects and analyzes physical measurements, spectroscopic data, and imaging of the diamond as a rough crystal before it is cut and polished. A unique identification number is assigned to the rough diamond. GIA later uses this data to scientifically match the polished diamond to the original rough crystal it came from.

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      Today diamonds are mined in some 25 countries on every continent but Europe and Antarctica. The top seven producing countries, that account for 80 percent of the world's rough diamond supply, are Australia, Botswana, Zaire, South Africa, Russia, Angola, and Namibia. Fact or Fiction!?! This is a fact. For more information, visit DeBeers:

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