• Tommy D
  • Tommy D
  • Tommy D


A diamond’s cost is based on the characteristics known as the “4 C’s”. Clarity, Colour and Cut are the quality elements which together with the Carat Weight determine the value of a stone.

Diamond Video

The 4 C’s :

  • Colour
  • Carat
  • Clarity
  • Cut


Color is a very important factor in diamond grading, or more correctly absence of color. Most Diamonds are graded on a Whiteness scale. The colors that may decrease the value or rarity of a diamond range from yellow to brown to silver to grey. The whiter or clearer the color of the diamond, the more rare and stronger the feeling of pureness and beauty. Ideally, a diamond should have no colour at all, Increasing degrees of body colour are measured on a scale ranging from no colour at all (D) to deeply coloured (Z). Beyond “Z” is the range where the diamond’s colour is vivid and rich, called “fancy colours”. Diamonds of known colour are used as comparison stones for colour grading. Grading is done by comparing the diamond to be graded against these “master stones” under either artificial or natural north daylight.

Colourless (GIA Range D, E, F)

Colour Range D-F

Near Colourless (GIA Range G, H, I, J)

Colour Range G-J

Faint Yellow (GIA Range K, L, M)

Colour Range K-M

Carat Weight

A carat is the unit of weight by which diamonds and all other gemstones are measured. One carat is subdivided into 100 “points”. Therefore a diamond measuring 50 points is ½ a carat in weight, or 0.50ct. This is when we talk about a 50 pointer diamond/stone.

Because bigger diamonds are found less commonly than small diamonds, the price of a diamond rises exponentionaly to its size, so the bigger the stone, the bigger the price.


Most diamonds contain some inner flaws, or “inclusions”, that occur or form during the creation process. A diamond’s clarity is determined by visibility and the amount, nature, position or size of these “inclusions”. These irregularities occurred in the liquid magna when, the diamond was created and are mostly other minerals and small pieces of carbon that got trapped within. Diamonds that are clear create more brilliance, and thus are more highly prized, and priced.

Clarity is measured on a scale ranging from pure (flawless) to heavily included (I-3). The clarity of a diamond is graded by using 10X magnification under good lighting by an experienced grader. The final clarity grade is usually determined by how easy the inclusions and blemishes are for the grader to see.


The Cut or shape of a diamond ensures that a given stone has maximum brilliance and sparkle. Round brilliant Diamonds have to be cut to perfect proportions in order for natural light to be reflected to create the brilliance.

Diamond Cuts