Investor Learning Center

How Diamonds are Graded

Every diamond is unique, and display a wide variety of properties. Because of this every diamond must be evaluated to some degree to determine it’s value before it exchanges hands, or goes to market. As diamonds became more and more popular, and readily available, there became a great need for a unified grading system. This need lead to the establishment of the Gemological Institute of America (GIA) in 1931 by Robert M. Shipley. The GIA’s mission was and is to protect buyers and sellers of gemstones by creating and maintaining a set of standards used to evaluate gemstone quality. This was no easy task and required much research and innovation.

grading

In 1933, Robert M. Shipley Jr. joined his father and began work on a low-power stereoscopic magnification microscope that utilized dark-field illumination. This equipment made it possible to begin evaluating stones in a much more detailed manner than ever before, and allowed the GIA to flourish as a research and education institute.

This new technology provided the platform for Richard T Liddicoat, Marquis Person, Joe Phillips, Robert Crowningshield and Bert Krashes to begin developing a new grading system they called the Diamond Grading and Evaluation Appraisal. By 1953 this system had been fully defined, and was released for use. It assessed four primary properties of a diamond and provided a universal platform for all gemologists to apply to diamonds.

Today the system is commonly refereed to as the Four C’s.
Color
Cut
Clarity
Carat Weight

While competition does exist, the GIA’s Grading system and certification remains the most globally accepted and sought after standard for white and rare colored diamonds.


Read the next article:

Investing In Fancy Colored Diamonds

Investing in rare colored diamonds is a long-term investment. The economic cycles of the past 15 years have seen colored diamonds reach new heights in value as price records were broken.

Historical Price Tracking System
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  • Yellow
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  • Red
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The GIA report for this diamond is not posted on the website at this time however it is available. Please fill out a form to inquire or call us directly at 800-456-3934 for more information.

1 Carat Radiant Cut Fancy Vivid Pink

  • Year: 1980
  • Total Price: $50,000
  • Price per Carat: $50,000
  • Source: Private Sale

1 Carat Radiant Cut Fancy Vivid Pink

  • Year: 1990
  • Total Price: $150,000
  • Price per Carat: $150,000
  • Source: Auction

1 Carat Radiant Cut Fancy Vivid Pink

  • Year: 2000
  • Total Price: $500,000
  • Price per Carat: $500,000
  • Source: Private Sale

1 Carat Radiant Cut Fancy Vivid Pink

  • Year: 2008
  • Total Price: $1,000,000
  • Price per Carat: $1,000,000
  • Source: Auction

1 Carat Radiant Cut Fancy Vivid Pink

  • Year: 2009
  • Total Price: $1,090,500
  • Price per Carat: $1,090,500
  • Source: Private Sale

1 Carat Radiant Cut Fancy Vivid Pink

  • Year: 2020
  • Total Price: $2,828,187*
  • Price per Carat: $2,828,187*

*Estimated value based on current market trend

1 Carat Radiant Cut Fancy Vivid Pink

  • Year: 2025
  • Total Price: $4,361,506*
  • Price per Carat: $4,361,506*

*Estimated value based on current market trend

1 Carat Radiant Cut Fancy Intense Yellow

  • Year: 1980
  • Total Price: $1,000
  • Price per Carat: $1,000
  • Source: Auction

1 Carat Radiant Cut Fancy Intense Yellow

  • Year: 1990
  • Total Price: $3,000
  • Price per Carat: $3,000
  • Source: Private Sale

1 Carat Radiant Cut Fancy Intense Yellow

  • Year: 2000
  • Total Price: $9,000
  • Price per Carat: $9,000
  • Source: Auction

1 Carat Radiant Cut Fancy Intense Yellow

  • Year: 2008
  • Total Price: $23,500
  • Price per Carat: $23,500
  • Source: Private Sale

1 Carat Radiant Cut Fancy Intense Yellow

  • Year: 2009
  • Total Price: $26,300
  • Price per Carat: $26,300
  • Source: Auction

1 Carat Radiant Cut Fancy Intense Yellow

  • Year: 2012
  • Total Price: $32,000
  • Price per Carat: $32,000
  • Source: Private Sale

1 Carat Radiant Cut Fancy Intense Yellow

  • Year: 2020
  • Total Price: $53,993*
  • Price per Carat: $53,993*

*Estimated value based on current market trend

1 Carat Radiant Cut Fancy Intense Yellow

  • Year: 2025
  • Total Price: $74,873*
  • Price per Carat: $74,873*

*Estimated value based on current market trend

1 Carat Radiant Cut Fancy Vivid Blue

  • Year: 1980
  • Total Price: $60,000
  • Price per Carat: $60,000
  • Source: Private Sale

1 Carat Radiant Cut Fancy Vivid Blue

  • Year: 1990
  • Total Price: $200,000
  • Price per Carat: $200,000
  • Source: Private Sale

1 Carat Radiant Cut Fancy Vivid Blue

  • Year: 2000
  • Total Price: $600,000
  • Price per Carat: $600,000
  • Source: Private Sale

1 Carat Radiant Cut Fancy Vivid Blue

  • Year: 2008
  • Total Price: $1,350,000
  • Price per Carat: $1,350,000
  • Source: Private Sale

1 Carat Radiant Cut Fancy Vivid Blue

  • Year: 2009
  • Total Price: $1,494,000
  • Price per Carat: $1,494,000
  • Source: Auction

1 Carat Radiant Cut Fancy Vivid Blue

  • Year: 2020
  • Total Price: $4,555,497*
  • Price per Carat: $4,555,497*

*Estimated value based on current market trend

1 Carat Radiant Cut Fancy Vivid Blue

  • Year: 2025
  • Total Price: $7,561,708*
  • Price per Carat: $7,561,708*

*Estimated value based on current market trend

1 Carat Radiant Cut Fancy Red

  • Year: 1950
  • Total Price: $13,800
  • Price per Carat: $13,800
  • Source: Private Sale

1 Carat Radiant Cut Fancy Red

  • Year: 1987
  • Total Price: $927,000
  • Price per Carat: $927,000
  • Source: Auction

1 Carat Radiant Cut Fancy Red

  • Year: 2008
  • Total Price: $2,000,000
  • Price per Carat: $2,000,000
  • Source: Private Sale

1 Carat Radiant Cut Fancy Red

  • Year: 2009
  • Total Price: $2,074,600
  • Price per Carat: $2,074,600
  • Source: Private Sale

1 Carat Radiant Cut Fancy Red

  • Year: 2020
  • Total Price: $3,103,720*
  • Price per Carat: $3,103,720*

*Estimated value based on current market trend