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Writer's pictureHowe Wei

Diamond 101: What You Don't Know About the 4C's of a Diamond

Updated: Apr 4

While many of us have heard of these characteristics, not everyone knows how they impact a diamond's value. Let me break it down for you in a simple and easy-to-understand way, so you can make informed decisions when it comes to purchasing or valuing diamonds.


If you are curious about the 4C's of a diamond, read on, as a gemologist in Singapore, I'm here to share my knowledge and help you understand what makes a diamond truly valuable.


Uncover the secrets of the 4Cs of diamonds - cut, color, clarity, and carat weight. Make informed decisions on diamond purchases with Gemguru sg!


Understanding the 4 C's of Diamonds: Cut, Clarity, Carat, and Color

Understanding the 4 C's of Diamonds: Cut, Clarity, Carat, and Color

The 4Cs of a diamond are cut, color, clarity, and carat weight. These factors determine the quality and value of a diamond. The cut refers to the diamond's proportions and how well it reflects light. Color refers to the presence or absence of color in a diamond. Clarity refers to the presence or absence of flaws or inclusions in the diamond. Carat weight refers to the weight of the diamond. Understanding the 4Cs can help you make an informed decision when purchasing a diamond.


Carat Weight of Diamond

1. Carat Weight of Diamond

Carat weight is one of the most important factors in determining the value of a diamond. Carat weight is a standardized measurement used in the diamond industry. It refers to the weight of a diamond which is measured using a precise scale, with one carat equaling 0.2 grams. The carat weight of a diamond can greatly impact its price, with larger diamonds typically being more valuable than smaller ones.

Colour Grade of Diamond

2. Color Grade of Diamond

The color grade of a diamond refers to the level of color present in the stone. The Gemological Institute of America (GIA) grades diamonds on a scale from D (colorless) to Z (light yellow or brown). The less color a diamond has, the more valuable it is considered to be. The color grade of a diamond helps buyers to understand the quality and value of a diamond. The color grade of a diamond allows for fair and accurate pricing of the diamonds. Jewelers and diamond dealers uses color grade of diamond to highlight the quality of their products to customers.

Clarity Grade of Diamond

3. Clarity Grade of Diamond

The Clarity Grade of a diamond refers to the presence or absence of internal and external flaws, also known as inclusions and blemishes. These flaws can affect the diamond's brilliance and overall appearance, and are graded on a scale from Flawless (no inclusions or blemishes visible under 10x magnification) to Included (inclusions and blemishes visible to the naked eye).

The clarity of a diamond helps determine its value and quality of a diamond. As a buyer, the clarity grade of a diamond allows you to make an informed decision when purchasing a diamond. The clarity of a diamond also ensures that the diamond meets the desired level of clarity and appearance.

cut grade of diamond

4. Cut Grade of Diamond

The cut grade of a diamond refers to how well the diamond has been cut and shaped. A well-cut diamond will have maximum brilliance, fire, and sparkle, while a poorly cut diamond will appear dull and lifeless. The cut grade is the most important factors in determining the value and beauty of a diamond. A diamond’s cut grade is determined by the diamond's proportions, symmetry, and polish. The GIA (Gemological Institute of America) is the leading authority on diamond grading and sets the industry standard for cut grades. Cut grades of a diamond range from Excellent to Poor, with Excellent being the highest grade.


A well-cut diamond will have maximum brilliance, fire, and sparkle, making it more visually appealing and valuable. A diamond with a higher cut grade will also appear larger than a diamond with a lower cut grade, even if they are the same carat weight. Knowing the cut grade of a diamond can help you make an informed decision when purchasing a diamond, ensuring that you get the best value for your money.



Deciding Which Diamond to Buy Base on What You See and Like

Beauty is in the Eye of the Beholder: Deciding Which Diamond to Buy Base on What You See and Like

When it comes to buying a diamond, it's important to consider what you see and what you like. One term you may come across is "hearts and arrows," which refers to the pattern visible in some diamonds when viewed under a special scope. However, just because a diamond has hearts and arrows doesn't necessarily mean it's an ideal cut.


Ultimately, the most important factor in deciding which diamond to buy is your own preferences and budget. Cash is another aspect to consider, knowing how much you want to spend and for what purposes. Don't be swayed by sales pitches or the opinions of others - choose what feels right for you, whether you're buying for yourself or for a partner. And while some people may prefer to buy from well-known brands like Tiffany or Harry Winston, it's important to remember that there's no one "best" diamond - it's all about finding what you personally love.


Many people are drawn to the prestige and reputation of well-known diamond brands like Tiffany or Harry Winston. These brands have built a reputation for quality and luxury over many years, and their diamonds are often associated with special occasions and romantic gestures. However, it's important to remember that the brand name alone doesn't guarantee a high-quality diamond. When buying a diamond, it's important to consider factors like cut, clarity, and carat weight, as well as your own personal preferences and budget. Ultimately, the decision to buy a Tiffany or Harry Winston diamond should be based on what feels right for you, rather than on the brand name alone.


Want to learn more about diamonds? Contact us for free advice from Gemguru.sg



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