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2. Brilliant (diamond cut) - Wikipedia

   en.wikipedia.org/wiki/Brilliant_(diamond_cut)

   Diamond proportions and facets, for the round brilliant cut. The modern round brilliant-cut was developed by Marcel Tolkowsky in 1919. The ideal proportions are 100% diameter, 53% table, 43.1% pavilion and 16.2% crown. The girdle and culet (if any—not part of Tolkowsky's original design) are cut from the ideal brilliant.

3. Diamond cut - Wikipedia

   en.wikipedia.org/wiki/Diamond_cut

   The most popular of diamond cuts is the modern round brilliant, whose 57 facets arrangements and proportions have been perfected by both mathematical and empirical analysis. Also popular are the fancy cuts, which come in a variety of shapes, many of which were derived from the round brilliant. A diamond's cut is evaluated by trained graders ...

4. Marcel Tolkowsky - Wikipedia

   en.wikipedia.org/wiki/Marcel_Tolkowsky

   Marcel Tolkowsky found that if a diamond was cut too deep or shallow then light would escape out the sides or bottom of the diamond, resulting in a loss of brilliance (white light reflected up through the top of a diamond), fire (colored light reflected from within a diamond), and sparkle (combination of fire and brilliance). [4]

5. Scale model - Wikipedia

   en.wikipedia.org/wiki/Scale_model

   Models are built to scale, defined as the ratio of any linear dimension of the model to the equivalent dimension on the full-size subject (called the "prototype"), expressed either as a ratio with a colon (ex. 1:8 scale), or as a fraction with a slash (1/8 scale). This designates that 1 inch (or centimeter) on the model represents 8 such units ...

6. Figure painting (hobby) - Wikipedia

   en.wikipedia.org/wiki/Figure_painting_(hobby)

   The assembly and painting of models is a major aspect of the hobby of miniature wargaming. Figure painting, or miniature painting, is the hobby of painting miniature figures and/or model figures, either as a standalone activity or as a part of another activity that uses models, such as role-playing games, wargames, or military modeling.

7. List of model aircraft manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_model_aircraft...

   Golden Ade Hobby Kits (Ukraine) - brand of Olimp Models; Gran (Russia) Grand Phoenix Model Products (USA) Great Wall Hobby (China) Greenbank Castle (USA) Greenmax (Japan) Griffon (Japan) - Only produced one kit (Su-22 in 1/72nd scale) before disappearing. Grip (Japan) - ex-Eidai; Gunze Sangyo (Japan) Hapdong Tech (Korea)