Investor Learning Center

How Diamonds Are Processed

The vast majority of the world’s diamonds are found in volcanic pipes know as kimberlites. These kimberlites carry diamonds from deep in the earth’s crust, to the surface of earth where they solidify and host the diamonds within. As these are subterranean, extracting these diamonds requires the mining of this host rock, or diamondiferous ore. This ore is mined from the earth in smaller pieces, and delivered to a process plant for extraction.

mine trucks

Extraction of diamonds from host rock typically occurs in several stages. The first four of these stages is often repeated multiple times in order to isolate and recover different diamond sizes, the first run will typically produce larger stones, and when repeating smaller and smaller stones can be recovered.

crushing

Stage 1 : Primary Crushing

Stage 2 : Secondary Crushing

Stage 3 : Dense Medium Separation Mixing

Dense-Medium-Separation-Mixing

Stage 4 : Cyclonic Separation Plant

Once cyclone separation has been completed, processors are left with a concentrate of materials more likely to contain diamonds within. These host materials are now sent for further scanning, and separation.

Stage 5 : Hydrophobic Grease Separation

sorting

Stage 6 : X-Ray Fluorescence Separation

Stage 7 : Boiling and Collection


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
  • Pink
  • Yellow
  • Blue
  • Red
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The Investor Learning Center was created to provide investors with the tools to make the right decision when it comes to investing in Rare Colored Diamonds.
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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