How The Shape Affects Price
As you learned in the Four C’s tutorial, the word “cut” actually refers to two different traits ::
- the Shape
(as in round, oval, cushion, asscher)
- the Make
(how well the shape is cut, including proportions, finish, and symmetry)
On this page we will discuss how the basic shape of a diamond significantly affects the price in ways that might surprise you. It is worth a separate lesson to explain this.
Basically, Rap prices are a high starting asking price, and discounts are negotiated from there.
The discounts from Rap depend on the shape, for two reasons ::
- different shapes have different levels of demand
- some shapes have a better yield from the rough, meaning that less is wasted during cutting because the final shape is closer to the original rough shape.
For a general guideline, you should now be able to find diamonds — with all quality factors in acceptable ranges — at the following discounts from Rapaport. Exceptional qualities will increase the price to a small degree, while even a single unacceptable quality in a diamond may decrease the price very significantly.
The following discounts vary widely from season to season and year to year.
Check the latest with your jeweler.
Discounts “off of Rap” ::
- Round: subtract 10-15% — from the round price sheets
- Marquise: subtract 10-15% — from the pear price sheets
- Pear: subtract 15-20% — from the pear price sheets
- Princess: subtract 25-30% — from the pear price sheets
- Emerald: subtract 25-30% — from the pear price sheets
- Oval: subtract 20-25% — from the pear price sheets
- Heart: subtract 25-30% — from the pear price sheets
- Radiant: subtract 25-30% — from the pear price sheets
- Cushion; subtract 20-30% — from the pear price sheets
- Other: subtract 25-35% — from the pear price sheets
The figures above are greatly oversimplified. Please do not try to calculate a price from this alone. You need to adjust for all 13 factors on a certificate to arrive at a fair, accurate price.
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