Version 1.05 March 2020
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6.2.12
CROWN MAIN FACETS
Again, proceed cautiously and inspect often.
Main facets
– set Angle Dial at 40 degrees
96 Index at: 96 (0),12, 24, 36, 48, 60, 72, 84
Cut the Main Facets so that they meet at points along the
girdle.
6.2.13
STAR FACETS
.
Again, proceed cautiously and inspect often.
Star Facets - set Angle Dial to 25 degrees
96 Index 6,18,30,42,54,66,78,90
Cut the Star Facets to meet the points of the Break Facets.
6.2.14
POLISHING OF THE CROWN FACETS
Polishing of the Crown Facets is done in the same way as the polishing of the Pavilion, and again, in reverse
order. When you have finished polishing the Crown Facets, you are almost there-- the table is what remains.
6.2.15
THE TABLE.
Remove the dopped stone from the spindle. Place the Tabling Adapter onto the spindle (read the section about
the Tabling Adapter).
Completing the Table. When you become more skilled you will find
the rough table that was put on for the initial dopping is very close to
the final table position. In this first attempt you will probably find there
is still significant material to remove, and that you need to use the 600
lap (or the 1200 lap) to get to the final position of the Table Facet.
Grind the stone to the final table position--and polish as with the
facets. The table, compared to the other facets, is a very large facet
and patience is needed in the polishing. Because of the relatively
large surface areas, the polishing operation can be noisy--a squeaky
noise (extra water with a few drops of detergent can be helpful).
Steady firm pressure and slow lap speed will reward you with a well
polished table--and a completed stone.
Remove the stone as you did after the first dopping--and you have it. Congratulations.
