This page shows the process of cutting a very rare large Yogo Sapphire
crystal. First are a few pictures of the rough The weight at this point
is 7.73 carats.
Here the table is defined. Some of the original surface
remains that will be removed in the polishing process. You can also see
reflective inclusions that will only be partly removed. They are
the white blotches toward the top. Weight here is 7.35 carats
Here the stone is dopped to the table to rough out the bottem of the stone.
Here you can see an inclusion near the point and a pit in the original
surface just to the right that will be removed when I finish the
Pavilion. You can also see the reflective inclusion that will be left
in as removing it would cause serious weight loss. Weight at this point
is 4.11 carats.
Next it is redopped and the table polished.
Then the crown facets are cut.
Next is the polish starting with star facets followed by main facets and break facets last.
The stone is then transfered and the pavilion facets cut.
The last steps are polishing the pavilion facets starting with the main
facets then break facets and then rounding out the girdle.
After cleaning it up the finished stone weighs in at 2.62 carats. That
breaks my previous record of 2.30 for round brilliant Yogo.