diamonds with different cuts

All About Diamonds (Part 1 of 4) – By Shivraj Gaekwad

Facts and History

  • Diamonds were first mined in India more than 2800 years ago.
  • The very word ‘diamond’ comes from the Greek term ‘Adamas’ meaning unconquerable.
  • The youngest diamond is 900 million years old, and the oldest is 3.2 billion years old.
  • On an average a stone loses, almost half  its original weight during cutting and polishing

The 4 C’s of Diamonds are :

  1. CUT

About the 4 C’s

  • The 4 C’s are the most inevitable parameters when grading and valuing diamonds.
  • All the 4 parameters command an equal importance in assessing the quality of the diamonds.
  • Very often the importance of the 4 C’s is overlooked in comparison to the 5th C – Cost!

The first C – CUT

  • “Cut” refers to the way the diamond is cut keeping very specific measurements and   proportions that bring out the maximum brilliance in the final stone.
  • Cut is not the same as Cutting style or Shape.
  • Importance of Cut is often overlooked when judging the quality of diamonds.

Cutting Process and Techniques

  • Cutting diamonds is a tedious multistage process.
  • Diamonds are separated from the mines according to the shape of the rough crystals.
  • Rough diamonds are first planned and marked. This involves deciding on what best quality diamond can be cut from the rough crystals that are found. This is a very important stage and eventually decides the cost of the diamond.
  • The Planned diamonds are then sawed and Bruted by either of the two techniques :-
    1. Manual sawing
    2. Laser Sawing

diamonds specifications Some Ideal Cut & Proportions

  • Crown Angle = 34`
  • Pavilion Angle = 40.5`
  • Table Size = 56%
  • Total facets including table = 57

Bruted diamonds are then polished and faceted according to very specific proportions and physical shape.

The Cut Grading Pyramid


Popular Cuts Today
diamonds with different cuts

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