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The smart consumer's diamond buying guide.... |
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Diamond Buying Made Easier > Diamond Glossary > Diamond Glossary- IDiamond Glossary - Ideal Cut, Inclusions, Internally FlawlessThis is our diamond glossary of terms used in the diamond jewelry business.... facts about diamonds-  Click a letter to view terms - Diamond Glossary - II: A grade in GIA's Color Grading System.... in the middle of the "Near Colorless" category.Ideal Cut: A Round Brilliant Cut diamond that cut to optimal proportions, with optimal polish and symmetry. There is no universally accepted standard for an Ideal Cut. The most commonly mentioned proportions when talking about an Ideal Cut is the proportioning that was mathematically determined by Marcel Tolkowsky in 1919. See Diamond Cut IGI: International Gemological Institute. A gemological laboratory which offers a diamond grading reports also written appraisals.  Illusion setting: A head designed to make the diamond that is set into it look larger than it actually is.... hence it is giving the "illusion" of a larger diamond. The metal that surrounds the stone usually has an intricate design. Included (I1,I2,I3): "I" in GIA's Clarity Grading System... "contain inclusions which are obvious to a trained grader under 10X, can often be easily seen face-up with the unaided eye, seriously affect the stone's potential durability, or are so numerous they affect transparency and brilliance". I1 usually has inclusions that are visible to the unaided eye and at the end of the I3 grade the diamond can no longer be considered gem quality. Included Crystal: A mineral crystal (many times it's another diamond, but it could also be one of many different minerals) contained inside of a diamond. Include crystals can be almost any size, colored or colorless, and can occur alone or in groups. Dark included crystals are often called "carbon spots" or just "carbon", but it's an incorrect term when referring to these diamond inclusions. Inclusions: This is all the fun stuff inside of your diamond.... things that are included inside of your diamond at no additional charge! These are clarity characteristics found within most diamonds and they could almost be considered a fingerprint because the inclusions in each diamond can be very different. Most inclusions were created when the gem first formed in the earth billions of years ago. Common diamond inclusions include feathers, crystals, fractures, graining, pinpoints, and cavities. Internal Graining: Internal indications of irregular crystal growth. May appear milky, like faint lines or streaks, or may be colored or reflective. Internally Flawless: "IF" in GIA's Clarity Grading System... "no inclusions when examined by a skilled grader, and only insignificant blemishes under 10X". Industrial Diamonds: Non-gem quality diamonds used in drills and other tools. Invisible Set Diamonds: A skilled method of setting square gemstones into two rows or more with no metal showing between the rows. Irradiated Diamond: A diamond which has been exposed to a stream of accelerated electrons and then heated in order to alter its color. See Color Enhanced Diamonds. |
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