From the Table to the Culet - Diamond Terminology
The culet is the point at the bottom of the diamond. It should be small to medium. Larges are acceptable. And it should be on center relative to the top of the diamonds otherwise the angles of the pavilion will be off and light leakage will occur. Another proportion that is included on some certificates is the civilian deaths. This corresponds to the Crown Heights except it is on the bottom of the stone below the girdle. All it is is the distance between the girdle in the culet as a percentage of the diameter. Acceptable ranges of the pavilion are 40 to 46%. There're two other characteristics of cut that you should be aware of and pay attention to Polish and symmetry which are sometimes called proportion. Polish means the final external finish at the diamonds. You can be very important to a stones refracting index. After the diamond is cut it is polished to smooth out AnyNet. The finishes given an overall verbal grace. The top of the line is good diminishing to fair to good fair and poor. Good is the most desirable of course but fair to good is acceptable. Symmetry is the degree the degree to which the various angles and facets lineup the degree to which in other words the diamond is well centered and well proportioned an overall sense. The word grading on symmetry is the same as polish good fair to good fair and poor. Here again good and fairly good acceptable.
Having provided all these criteria let me add a few comments. First of all once again it will be difficult for the novice to make his own judgment on the cut of the stone based simply on eyeball inspection. Laboratory Jamaal just greater proportion of a diamond with the help of an instrument known as a proportion scope which enables him to enlarge the image of the stone under examination make precise geometric calculations and compare the results with the ideal measurements. The importance of cut is not to be slighted. If the diamond deviate substantially from the ideal significant loss the value received results. But at the same time many investors turned overnight experts make the mistake of stubbornly insisting on a certain ideal table or depth or crumpled portion that may certainly in today's market be right but proven possible to sell at any price.
