In the blocking steps, "8 pavilion mains, 8 crowns, 1 culet, and 1 table facet are added to make a single cut stone" which serve as a template for the brillianteering step.
The brillianteering step adds "the remaining facets, bringing it to a total of 57 facets." This is probably the most important step in the whole process as it determines the diamond' fire and brilliance.
Inspecting the Polished Diamond
The last step involves inspecting the diamond in order to verify whether it adheres to the manufacturer's requirements.
Mercury Diamond is a "diamond pricing consultancy founded by Ehud Laniado" that features more than 18,000 prices for polishing and cutting a diamond.
The cost of polishing a diamond varies based on its color (from D to M), clarity (from SI2 to IF), and the shape (round, semi-round, or square).
For instance, diamonds between 10 and 15 carats that are SI2 cost between $8,300 and $30,400 per carat to polish while those that IF, or internally flawless, cost between $13,900 and $113,800 per carat to polish.
The polishing prices for 15 to 20 carat diamonds are similar to the 10-15 carat ones, with SI2 diamonds costing between $10,300 and $37,900 per carat while the IF diamonds cost between $16,700 and $122,500 per carat.
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