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2. www.igi.orgInternational Gemological Institute | Jewelry & Gemstone Grading

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   20 de mai. de 2024 · IGI is the world's largest independent lab for testing & grading diamonds, gemstones, & jewelry, with 29 labs & 18 schools in 10 countries.

3. www.britannica.com › science › gemstoneGemstone | Definition, History, Types, & Facts | Britannica

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   21 de mai. de 2024 · gemstone, any of various minerals highly prized for beauty, durability, and rarity. A few noncrystalline materials of organic origin (e.g., pearl, red coral, and amber) also are classified as gemstones. Gemstones have attracted humankind since ancient times, and have long been used for jewelry.

   • Autor: The Editors of Encyclopaedia Britannica

4. Vídeos

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     Gem-A Live: Understanding Gemstone Species and Varieties

     21 mai.. 2020

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     All About Phenomenal Gemstones: Star Sapphire, Labradorite, More!

     23 nov.. 2021

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     How To Become A Gemologist? | How To Start Your Career In Gemology

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5. luvente.com › blog › postThe Science of Gemology: Understanding Gemstone Grading

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   Há 3 dias · In the fascinating realm of gemology, the cut of a gemstone is not merely a matter of shape, but a masterful manipulation of light. This crucial aspect of gemstone grading hinges on the gem-cutter’s ability to harness the raw beauty of a gem, guiding each ray of light through its facets with precision.

6. www.gia.edu › gems-gemology › spring-2018-gemnewsRex Guo: The Science and Art of Recutting Fine Gemstones

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   Há 4 dias · Deciding how to cut a gemstone is inevitably one of the most difficult decisions when transforming a piece of rough into a fine faceted gem. The three main factors to consider are final carat weight, color, and light performance (a general term describing the brilliance and scintillation of a faceted stone).

7. www.gia.edu › gia-aboutThe GIA Difference - GIA.edu

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   Há 4 dias · A Tradition Of Science and Education. Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry.

8. www.gia.edu › schoolProfessional Gem Education | Gemology School – GIA

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   Há 2 dias · We offer the finest gem and jewelry education in the world with curriculum developed from our groundbreaking research and delivered by the industry’s leading experts. GIA gives you the knowledge and practical skills to translate your love for gems and jewelry into a rewarding career.

9. www.britannica.com › topic › diamond-gemstoneDiamond | Definition, Properties, Color, Applications, & Facts

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   Há 6 dias · In the symbolism of gemstones, the diamond represents steadfast love and is the birthstone for April. Diamond stones are weighed in carats (1 carat = 200 milligrams) and in points (1 point = 0.01 carat).