The Ultimate Guide To 4cs Of Diamonds

The ultimate guide to 4cs of Diamonds

When buying a loose diamond, it is only necessary to know the basics, and 4C’s are as basic it gets. So, what are the important 4Cs to check before buying loose diamond?

They are Colour, Clarity, Cut, and Carat.

Color of loose diamonds:

Coloured loose diamonds not only form naturally but can also be created in Laboratories. When billions of carbon atoms bond and all are carbon, then a colorless loose diamond is formed.

The GIA lists 27 different hues for natural coloured diamonds, and it is industry’s widely accepted grading system.

The colour grading ranges from D (colorless) to Z (light yellow). GIA's D-to-Z color-grading system measures the degree of colorlessness by comparing a loose diamond under controlled lighting and precise viewing conditions to establish the color value.

More color in a diamond can reduce the prismatic effect of as light passes through the stone. Many of these color distinctions are so subtle that they are invisible to the untrained eye; however, these distinctions make a very big difference on loose diamonds’ quality and price.

  • The slightest quirk creates a colored diamond.
  • A bit of boron makes a blue diamond.
  • Nitrogen makes a yellow diamond.
  • Natural radiation from nearby rocks trap electrons to create a green surface color.
  • Pink or red shades are thought to be due to changes to the electron structure during the voyage to the surface.
  • A chemically pure and structurally perfect diamond has no hue.

Clarity of loose diamond:

Natural diamonds are a result of carbon exposed to tremendous heat and pressure deep in the earth. This process can result in a variety of internal characteristics called 'inclusions' and external characteristics which are tiny imperfections on the surface called 'blemishes.'

Evaluating loose diamonds clarity involves assessing diamond’s blemishes, and inclusions, and determining the number, size, relief, nature and position of these characteristics, as well as how these affect the overall appearance of the loose diamond.

While no diamond is perfectly pure, it is desirable that these clarity characteristics be few as it implies higher quality. Inclusions can be seen with the use of a 10x magnification lens known as a jeweller’s loupe.

Within a category, a "1" grading has fewer or smaller inclusions than a "2".

These as determined by a gemologist as to the naked eye, a VS1 and an SI2 diamond may look exactly the same, but these diamonds are quite different in terms of overall quality.

The grading are:

  • FL/ IF i.e., Flawless or Internally Flawless which have no visible inclusions with 10x magnification.
  • VVS i.e., Very Very Slightly Included which have inclusions which are difficult to see with 10x magnification.
  • VSI i.e., Very Slightly Included with Inclusions seen with 10x magnification.
  • SI i.e., Slightly Included with Inclusions easily seen with 10x magnification, but not visible through the crown with the unaided eye.
  • I i.e., Included eith Inclusions easily seen with the unaided eye. You can buy as low as VS.

Carat of loose diamond:

  • It signifies the weight of the diamond.
  • A metric "carat" is defined as 200 milligrams.
  • Each carat can be subdivided into 100 'points'.
  • This allows very precise measurements to the hundredth decimal place.

All else being equal, price of loose diamond increases with carat weight, because larger diamonds are rarer and more desirable. Two loose diamonds of equal carat weight can have very different prices depending on other factors within the 4Cs, which are Clarity, Color, and Cut.

If you are buying loose diamond to build your own jewelry item, keep in mind the impact the desired size of loose diamond will create.

Cut of loose diamonds:

Diamonds are famous for their ability to transmit light and sparkle so intensely.

  • Cut grade is about how a loose diamonds’ facets interact with light.
  • It refers to proportion, symmetry, and polishing.
  • Cut is very important as poorly cut loose diamond will not shine brightly even if it has good clarity and colour.
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Round diamonds are the most expensive and shine the brightest. The GIA Cut Grading System for the standard round brilliant diamond evaluates seven components. The first three are brightness, fire and scintillation; consider loose diamond's overall face-up appearance. The remaining four, weight ratio, durability, polish and symmetry, assess loose diamond's design and craftsmanship.

  • Brightness: Internal and external white light reflected from a loose diamond.
  • Fire: The scattering of white light into all the colors of the rainbow.
  • Scintillation: The sparkle a diamond produces, and the pattern of light and dark areas caused by reflections within the diamond.

You can assess the cut from the grading report from gemological labs. These labs issue one of five cut grades:

  • Excellent – These loose diamonds are very bright. They show even patterns with great contrast between light and dark areas.
  • Very Good – These loose diamonds have bright areas that are evenly distributed with very few distracting areas.
  • Good – These aren’t quite as bright. Reflections aren’t sharp, and there are bit of darkness within the loose diamond.
  • Fair – These loose diamonds will appear dull in some areas, but may have some reflection.
  • Poor – These loose diamonds have very prominent areas of dullness. They don’t have much sparkle

For a round loose diamonds, Cut grade of Very Good or Excellent will have superior brilliance, whereas Fancy shaped diamonds Cut grade of Good or Better will have good brilliance. Avoid loose diamonds with grades below good.

At Sanghavi Solitaire Inc., our goal is to help you purchase a diamond for a better price than any diamond wholesaler can offer. Every year there are millions of consumers who purchase GIA certified diamonds from various outlets across the world without comparing prices, and thus are overpaying. At Sanghavi Solitaire we try to deliver the best prices possible without sacrificing quality, helping you avoid unnecessary mark-up costs. Looking for a certain diamond or need advice? Call us now at 1800-234-1787.