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CUTTING CHARACTERISTICS
     
                                              Table      Star/ Upper main facet
  Upper girdle facet
 
Girdle
 
Lower girdle facet
Lower main facet
                                               Culet  
  When a stone is cut according     
  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.
           USUAL PROPORTIONS .
FL NFL SI1 SI2 MI1
Flaw less Near flaw less Slightly included 1 Slightly included 2 Medium included 1
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
MI2 MI3 VI1 VI2 HI
Medium included 2 Medium included 3 Very included 1 Very included 2 Highly included
            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.
PRINCIPAL COLORING ELEMENTS IN THE GEMS.
            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.
   
  Sawing a big star ruby in our workshop.
                                           
 Hand cutting.       Mechanical cutting.
¦ Gemology ¦ Cutting Styles ¦ Fancy Cutting ¦ Crystalline Systems ¦ Size & Weight ¦
                                   
 
All of the pictures on this website have been shot by gggems.com
Text written by Alain Darbellay.
 
 
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