• Diamond is a naturally occurring mineral made entirely of carbon atoms.

• Diamonds are formed deep inside the Earth under:

  • Extremely high pressure

  • Very high temperatures

• They are considered one of the hardest natural substances on Earth.

Colors of Diamonds

Diamonds occur in many colors, including:

1. Colorless (White) Diamond
2. Yellow Diamond
3. Blue Diamond
4. Pink Diamond
5. Green Diamond
6. Black Diamond
7. Cognac (Brown) Diamond
8. Red Diamond
9. Orange Diamond
10. Grey Diamond

Causes of Diamond Colors

Different colors occur due to:

• Nitrogen impurities:
  • Yellow diamonds
• Boron impurities:
  • Blue diamonds
• Radiation exposure:
  • Green diamonds
• Crystal distortion:
  • Pink and red diamonds
• Mineral inclusions:
  • Black diamonds

Colorless Diamonds

• Colorless Diamond is the purest form of diamond.
• Made almost entirely of carbon with minimal impurities.
• Highly valued for brilliance and sparkle.
• Graded using the D-to-Z scale by the Gemological Institute of America.
• Grades include:
  • D–F: Completely colorless
  • G–J: Near colorless
  • K–M: Slight yellow tint
  • N–Z: Noticeable yellow or brown tint

Yellow Diamonds

• Yellow Diamond gets its color from nitrogen impurities.
• Shades range from:
  • Pale yellow
  • Golden yellow
  • Deep canary yellow
• Stronger yellow color increases value.
• Often called “Canary Diamonds.”
• Famous example:
  • Tiffany Yellow Diamond
• Found mainly in:
  • South Africa
  • Australia
  • Russia

Brown Diamonds

• Brown Diamond is one of the most common colored diamonds.
• Color caused by crystal lattice distortions.
• Marketed under names such as:
  • Champagne Diamond
  • Cognac Diamond
  • Chocolate Diamond
• Shades range from:
  • Light champagne
  • Honey brown
  • Dark coffee brown
• Major source:
  • Australia

Blue Diamonds

• Blue Diamond is extremely rare and valuable.
• Blue color caused by boron impurities.
• Shades include:
  • Light icy blue
  • Steel blue
  • Deep ocean blue

• Major sources:

  • South Africa
  • India

Pink Diamonds

• Pink Diamond is one of the most sought-after fancy diamonds.
• Pink color caused by crystal structure distortion.
• Shades include:
  • Soft pink
  • Rose pink
  • Vivid hot pink
  • Purplish pink
• Most famous source:
  • Argyle Mine in Australia

Red Diamonds

• Red Diamond is the rarest diamond color.
• Only a few natural red diamonds exist worldwide.
• Color caused by intense crystal deformation.
• Usually very small in size.
• Famous example:
  • Moussaieff Red Diamond

Green Diamonds

• Green Diamond gets color from natural radiation exposure.
• Shades include:
  • Mint green
  • Olive green
  • Deep forest green
• Color often appears near the surface.
• Famous example:
  • Dresden Green Diamond

Orange Diamonds

• Orange Diamond is very rare.
• Pure orange diamonds are uncommon.
• Color caused by nitrogen-related defects.
• Shades include:
  • Pumpkin orange
  • Golden orange
  • Deep fiery orange

Purple and Violet Diamonds

• Purple Diamond is highly unusual and rare.
• Possibly caused by hydrogen impurities and crystal distortion.
• Shades include:
  • Lavender
  • Lilac
  • Deep violet
• Found mainly in:
  • Australia
  • Russia

Black Diamonds

• Black Diamond contains many dark mineral inclusions.
• Usually opaque rather than transparent.
• Some are natural; others are treated.

Gray Diamonds

• Gray Diamond has smoky gray coloration.
• Often contains hydrogen or tiny inclusions.
• May display:
  • Blue-gray tones
  • Silver-gray tones

• Diamonds occur in a remarkable range of colors.
• Each color forms through unique geological conditions.
• Fancy colored diamonds are among the rarest gemstones on Earth.
• Color significantly affects:
  • Beauty
  • Rarity
  • Market value