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https://www.gemselect.com/other-info/understanding-gem-size.php
Jul 28, 2014 · For many people, gemstone sizes can be very confusing, not only for those who are unfamiliar with the metric system, but also for those who don't completely understand the exact format in which gemstones sizes are described and provided. The internationally recognized unit of measurement for gems and jewelry, including diamonds, colored stones and jewelry …
https://www.gemsociety.org/gemology/introduction-to-gemology/
What are Gem Species and Gem Varieties? Gem species are mineral species prized for their durability and beauty. Learn how chemical formulas and crystal structures define species and… How Do Aquamarines Form?
https://www.interweave.com/article/jewelry/gemstone-inclusions-more-info-jewelry-makers/
Apr 15, 2019 · Understanding Gemstone Inclusions From Gemstones by Judith Crowe Inclusions are the internal structures and features found inside a crystal or gemstone; they can be solids (such as small crystals of another mineral), liquids (such as silica droplets), or gases, or they can be semi-filled fractures or cleavage breaks.
https://www.interweave.com/article/jewelry/gem-buying-5-ways-understand-gemstone-cuts/
Sep 11, 2018 · Gems have a table (the large facet in the center of the gem, looking down on it), girdle (the midline of the stone), crown (the top of the stone, above the girdle), pavilion (the bottom of the stone, below the girdle), culet (the usually small facet on the lowest part, the point or the keel line of the pavilion), shoulders (on pear shapes and hearts, the curving part of the girdle outline near the top of …
https://www.amazon.com/Gemstones-Understanding-Identifying-Keith-Wallis/dp/1851496300
-A new, updated edition of this bestselling guide to understanding, identifying and buying gemstones -Includes many new images, updated text and a new section on jewelry -A clear, uncomplicated approach to the subject, illustrated in color throughout, making the identification of gems simple Whether buying gem-set jewelry or loose stones, you will be faced with a colorful array of beauty and value.4.4/5(59)
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