About Diamond 4C

When you're looking for a wedding ring or engagement ring is important to know how to choose a perfect diamond, as diamond rings and bands are always an appropriate and well-loved gift.  
Whether it's the ring that will symbolize your love and marriage or the ring that will symbolize your continued love for one another.

Here's the complete guide of the basic diamond quality factors :

The 4Cs of diamond - the international diamond grading system

The 4Cs, created by GIA, are considered the global language of diamond quality.
Today diamond quality could be communicated in a universal language, and diamond customers could now know exactly what they were about to purchase.The subtle variations in each of it include carat weight, color, cut and clarity can cause significant differences in a diamond’s value.

Cupid Jewellery GIA 4C


The First C - Cutting grade of diamonds 

GIA diamond measurement

Diamonds are renowned for their ability to transmit light and sparkle so intensely. Precise artistry and workmanship are required to fashion a stone so its deliver the magnificent return of light only possible in a diamond.

Cupid Jewellery Diamond cutting grade
GIA diamond cutting grade

The Highest cutting grade given by GIA is “Excellent” grading in three aspect : cut grade, symmetry and polish.  ( only apply to round brilliant cut diamonds)

A diamond’s cut is crucial to the stone’s final beauty and value. And of all the diamond 4Cs, it is the most complex and technically difficult to analyze. GIA calculates the proportions of those facets that influence the diamond’s face-up appearance.

These proportions allow GIA to evaluate how successfully a diamond interacts with light to create desirable visual effects such as:
Brightness: Internal and external white light reflected from a diamond
Fire: The scattering of white light into all the colors of the rainbow
Scintillation: The amount of sparkle a diamond produces, and the pattern of light and dark areas caused by reflections within the diamond

The Second C : Color grading of diamonds

Cupid jewellery GIA diamond color grading

The diamond color evaluation of most gem-quality diamonds is based on the absence of color. A chemically pure and structurally perfect diamond has no hue, like a drop of pure water, and consequently, a higher value.  

 Many of these diamond color distinctions are so subtle that they are invisible to the untrained eye; however, these distinctions make a very big difference in diamond quality and price.

note: the colored diamond does not fall into the color grading system of D-Z color, whereas these colored diamond are extremely rare and valuable. (except brown and gray colored diamond are graded within D-Z color grading system)

The third C : Clarity grading of diamonds

Natural diamonds are the 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 called ‘blemishes.’

Evaluating diamond clarity involves determining the number, size, relief, nature, and position of these characteristics, as well as how these affect the overall appearance of the stone. While no diamond is perfectly pure, the closer it comes, the higher its value.

Cupid jewellery GIA diamond clarity grading

The Last C: Carat weight of diamonds

Diamond carat weight is the measurement of how much a diamond weighs.

A carat is defined as 0.2 gram. Apparently, the weight of the diamond it reflect on the size as well. Each carat can be subdivided into 100 ‘points.’ This allows very precise measurements to the hundredth decimal place.

A jeweler may describe the weight of a diamond below one carat by its ‘points’ . For instance, the jeweler may refer to a diamond that weighs 0.25 carats as a ‘twenty-five pointer.’ Diamond weights greater than one carat are expressed in carats and decimals.

Cupid jewellery GIA diamond carat weight