DAY ONE
a. Explanation on sawing techniques and how it relates to rough octahedral diamonds.
b. Explanation on bruting and how it affects the rough diamond.
c. The procedure of cutting and polishing in relation to facet placement.
d. How the diamond cutting wheel is used and its affect on polishing.
e. The use of the star gauge and butterfly gauge.
f. Facet placement for rough diamonds and common terms used among diamond cutters.
g. Examining rough octahedrons and misshapen crystals.
h. Identifying trigons and other surface markings.
i. Differentiating between 2 point, 3 point and 4 point grain structures.
j. Expected weight retention on octahedrons and misshapen crystals.
k. Proportion percentages and expected angles for light reflection and the resulting fire and brilliance that can be expected from one crystal in respect to another.
The Rough diamond grading student will be able to observe first hand diamond manufacturing techniques performed by the Institute in house diamond cutters. This will demonstrate visually to the student the manipulation and fashioning of rough diamonds.
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