Here is our grading department of our factories.
So when all the stone finish the polishing,
all the stone is sent to this department for the grading.
So first of all we would do the cutting grading first.
Because it's also called the [? final ?] QC.
In this section we will do all the cut grading
like the symmetry, and the polish, and also
the other dimension of the stone like cut grade.
So for the [INAUDIBLE] stone we will use the microscope
to check the polishing lines and if there's
any scratch or other tiny little stuff on the surface.
If there is some problems, or if the stone is not perfect,
they will send it back to the factory to repair it again.
Every [INAUDIBLE] stone, what we say [INAUDIBLE] stone
will be like [? 30 ?] points, we will all
put on the microscope to look at.
Because they are going to have a certificate, each
of the [INAUDIBLE].
So definitely we have to check it first
before we send it to the laboratory.
And then, normally, we will use that one
for paper [? tray ?] to do the QC.
So in different [INAUDIBLE] there are different
[? lengths ?] of the [? repairment. ?]
So maybe there's some scratch on the tables.
Or this one is the polish now is not good.
And then the [? brightness ?] of the stone is not perfect.
So they have different names of the problems.
And then, they will send to corresponding department
to do the [? repairment, ?] to make
sure all the stone we produce is perfect.
So after the final QC of the diamonds,
and record the grading of the cutting,
we'll go to the calibrating.
So you can see we are doing the calibrating according
to one set to the master stone.
So we will use, always use, the master stone
to compare the colors-- to be the reference of the diamonds.
And human eyes, actually, are very
accurate to determine colors, rather than machines.
So we always use human eyes to do the calibrating.
Actually, the grading of diamonds
is quite boring and very routine works.
So we find that womens is better than mens
because they have more patience to do this.
And men will get frustrating if they sit for a long time.
And they're more patient, and they
are more careful to look at the tiny little stuff.
Like for cutting they have to see the [? roundness ?]
and then see if there is the polish line or similar things,
scratches on the surface, and for the [? carat ?] grading.
They have to find some really [INAUDIBLE] tiny point
on the back, like [INAUDIBLE] [? to ?] [? a ?] stone when
they find.
All the grading is quite boring and routine.
So we chose to use woman.
Yeah, girls is better.
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