How The Shape Affects Price

As you learned in the Four C’s tutorial, the word “cut” actually refers to two different traits ::

  1. the Shape
    (as in round, oval, cushion, asscher)
  2. 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 ::

  1. different shapes have different levels of demand
  2. 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.

Next :: How Carat Weight Affects Price

Your Progress …

80