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| CUTTING CHARACTERISTICS |
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Table Star/ Upper main facet |
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Upper girdle facet |
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| Girdle |
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| Lower girdle facet |
| Lower main facet |
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Culet |
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| When a stone is cut according |
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| to good proportions, the light is |
If the stone is cut too thick, |
If the stone is cut too much flat, the |
| reflected from one facet to another |
part of the light escapes |
light escapes from it before to be |
| and arises by the top. |
outside downwards. |
returned on another facet. |
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| USUAL PROPORTIONS . |
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| FL |
NFL |
SI1 |
SI2 |
MI1 |
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| Flaw less |
Near flaw less |
Slightly included 1 |
Slightly included 2 |
Medium included 1 |
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| MI2 |
MI3 |
VI1 |
VI2 |
HI |
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| Medium included 2 |
Medium included 3 |
Very included 1 |
Very included 2 |
Highly included |
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 Note that our camera can grasp very small inclusions almost invisible to the |
| naked eye; this is why you can usually see these inclusions on the screen. |
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| PRINCIPAL COLORING ELEMENTS IN THE GEMS. |
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| Chromium |
Ruby, Emerald, Pyrope garnet, grossularite and uvarovite, Tourmaline. |
| Copper |
Dioptase, Malachite, Azurite. |
| Iron |
Sapphire, Aquamarine, Citrine, Almandin garnet. |
| Manganese |
Morganite, Pink tourmaline, Spessartite garnet. |
| Nickel |
Chrysoprase. |
| Titanium |
Blue Sapphire. |
| Vanadium |
Green beryl, Blue zoïsite , Garnet. |
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Sawing a big star ruby in our workshop. |
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| Hand cutting. |
Mechanical cutting. |
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 All of the pictures on this website have been shot by gggems.com |
| Text written by Alain Darbellay. |
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