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  2. International Gemological Institute - Wikipedia

    en.wikipedia.org/wiki/International_Gemological...

    IGI provides independent grading reports, colored stone reports, identification and appraisal reports, diamond authentication and attestations of origin, and laser inscription services. They also offers diamond and colored stone courses through IGI's Schools of Gemology. The IGI school was the first to offer the practical Rough Diamond course. [4]

  3. Gemological Institute of America - Wikipedia

    en.wikipedia.org/wiki/Gemological_Institute_of...

    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.

  4. 'Antiques Roadshow': $30 Ring Turns Out To Be Worth Fortune - AOL

    www.aol.com/entertainment/2014-02-18-antiques...

    What you have is a ring that looks like it's eight to 10 carats from the top, and ... it's a diamond.' The appraiser said the ring dated back to the 1920s or 1930s ... and would be conservatively ...

  5. 11 of the Best Lab-Created Diamond Earrings That Seriously ...

    www.aol.com/entertainment/11-best-lab-created...

    Looking for a pair of dangling drop earrings? These pear-shaped diamonds will look beautiful swaying just beneath your ears. This is another sterling silver pair that lets you wear diamonds ...

  6. Thermal conductivity measurement - Wikipedia

    en.wikipedia.org/wiki/Thermal_conductivity...

    A thermal conductance tester, one of the instruments of gemology, determines if gems are genuine diamonds using diamond's uniquely high thermal conductivity. For an example, see Measuring Instrument of Heat Conductivity of ITP-MG4 "Zond" (Russia). [25]

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Tumbler knife sharpener review, after weeks of testing - AOL

    www.aol.com/news/tumbler-knife-sharpener-review...

    Tumbler Knife Sharpener $129.00 at Amazon. Tumbler Knife Sharpener $98.00 at Tumbler. The Tumbler knife sharpener ($129) is a manual knife sharpener with two components: a two-sided rolling disc ...

  9. Material properties of diamond - Wikipedia

    en.wikipedia.org/wiki/Material_properties_of_diamond

    The precise tensile strength of diamond is unknown, though strength up to 60 GPa has been observed, and theoretically it could be as high as 90–225 GPa depending on the sample volume/size, the perfection of diamond lattice and on its orientation: Tensile strength is the highest for the [100] crystal direction (normal to the cubic face ...

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