Diamonds are simply forever; epitomes of romance love and care. Everybody desires to flaunt this perfect glittering stone.
When it comes to diamonds, carat weight and cut are often manipulated by the cutters to maximize profit. Rough diamonds can be sold and some stones pay off better if they are cut into several stones of lower cut quality instead of only one or two stellar brilliants.
Also, by taking a look at a table and seeing how many categories there are between a “fair cut” and an “ideal cut”, it can easily make one think that a “fair cut” diamond is something worthless – well, in my opinion, it actually is. Not surprisingly, these diamonds cost and values less (doesn’t look great either).
The depth and table percentages on the grading report should be within a specific range so that the diamond can be judged excellent, acceptable, or poor. There are also other factors that contribute to a diamond’s overall cut.
A diamond whose girdle is extremely thin ought to sell for less than one whose girdle is extremely thick due to the stone’s increased susceptibility to chipping. Also, they are usually not cut to ideal proportions and make them significantly cheaper than diamonds with good girdle proportions (medium).
This is also one of the reasons why 2 stones with similar carat weight can look different in physical dimensions. The polished stone may have variations in girdle thickness, may be somewhat off round, and have tilting in the table, among others.
More importantly, while diamonds are known for their hardness, they are brittle and can break when an appropriate force is applied on them. With an edge that’s extremely thin, it poses a bigger risk of chipping and causes the crystalline structure of the gemstone to break.
GIA Splits Finishing Into Two – Symmetry and Polishing
Many of the leading labs grade symmetry as Poor, Fair, Good, Very Good, and Excellent. Lab grading is based on microscopic examination to make sure the facets touch perfectly; this can give varying results to optical symmetry. However, the specifics for grading symmetry are slightly different for every lab.