Diamond buying tutorial 4Cs.

At Diagem Diamonds we understand that selecting a diamond can be a confusing experience, being bombarded with information about V.V.s. stones, GIA certificates, cut, carats and colour so we have set this diamond buying tutorial page in order for you to understand a bit more about diamonds and to take some of the bewilderment from the buying process, and more importantly, to make it a relaxed and enjoyable experience!

Once you have decided what it is you are looking for, please feel free to send us an inquiry or browse our online store Our staff have an extensive knowledge of diamonds and we are confident we can find the perfect stone for you!

1st C Cut

Shallow-Cut Diamonds

A shallow cut diamond allows light to escape from its sides instead of reflecting off its top.

Deep-Cut Diamonds

A diamond whose cut is too deep will look smaller than diamonds of similar carat weight.

Excellent - Cut Diamonds

This premier cut style is well-proportioned and carefully angled to achieve a luminous appearance.

2nd C Colour

Colorless (D,E,F)

Highest-quality color grade a diamond can receive. A D-color diamond is extremely rare and emits unrivaled brilliance.

Containing very minute traces of color, an E or F-color rated diamond emits a high level of brilliance and sparkle.

Near Colorless (G,H,I,J)

Containing noticeable color only when compared to higher color grades, G or H color diamonds provide an excellent value.

Whereas an I or J-color diamond typically appears colorless to the untrained eye yet contains slightly detectable color.

Faint Yellow (K,L,M)

Faint color is noticeable. Even with the presence of color, these grades of diamonds can emit fire and beauty.

Consider selecting a lower color when setting in yellow gold as color will be not as apparent.

3rd C Clarity

Flawless (FL), Internally Flawless (IF)

Internally Flawless (IF) diamonds may contain external characteristics (also known as blemishes) that are extremely difficult to view at 10x magnification on the stone's surface, if at all, whereas Flawless (FL) is the best clarity of a diamond as it does not contain any inclusions or blemishes, under the scrutiny of 10x magnification.

Very Very Slightly Included (VVS1, VVS2)

Although the name is seemingly redundant, Very Very Slightly Included (VVS1, VVS2) diamonds earn this grading because, unlike their Flawless or Internally Flawless bretherin, they do contain inclusions that are so minute that they're extremely difficult to locate under 10x magnification used by expert gemologist to determine a stones clarity.

Very Slightly Included (VS1, VS2)

Like their higher graded counterparts, VS1 and VS2 diamonds also contain minute inclusions, such as clouds, crystals, or feathers, but, unlike Very Very Slightly Included diamonds, Very Slightly Included stones' inclusions, though miniscule are only just difficult to locate with 10x magnification, rather than being extremely difficult.

Slightly Included (SI1, SI2, SI3)

Even without 10x magnification, Slightly Included diamonds (SI1, SI2, SI3) contain inclusions that are noticiable to the human eye such as clouds, knots, crystals, cavities, and feathers. However pronounced and numerous there are without magnification, thought, is what determines a diamond is either Slightly Included or fully Included.

Included (I1, I2, I3)

Diamonds that are graded as Included (I1, I2, I3) contain very obvious inclusions that can usually be seen with the naked eye, and even more underneath 10x magnification. Included diamonds sometimes display poor transparency and lack of brilliance due to excessive clouds, feathers, knots, cavities and crystals large and deep enough to be confused for smudges or cracks. Inspite of these blemishes, Included diamonds are still able to sell well enough, inspite of being considered undesirable as compared to a higher clarity graded stone.

4th C Carat weight.

Choose Quality Over Quantity

Diamond pricing is determined by carat weight, and broken down in half-carat increments. Therefore, assuming factors like cut and clarity are equal, a diamond weighing one carat will cost more than a diamond weighing slightly less than one carat. However, if the cut and clarity are not equal, it is possible that a diamond with a one-carat weight will cost less than a smaller diamond. For this reason, it is important to consider all of these factors, including the cut, color, clarity, and carat, when choosing a high quality diamond.

Does Size Matter?

Many people believe that the carat weight is a measure of the diamond’s size, but that’s not exactly true. The carat weight is a measurement of the diamond’s weight. While its carat measurement indicates the weight of a diamond, its length and width measurements indicate the actual physical size, or how big the diamond will appear when viewed from above. Diamonds of the same carat weight can vary in size depending on how they are cut. For example, a one-carat round diamond could measure 5.9 mm in diameter, while another one-carat round diamond could be 6.5 mm wide. Both of these diamonds are the exact same weight.

Slightly Off Color Diamonds

The price of a diamond typically rises as the carat weight increases. If carat weight is the most important factor in your search, consider a diamond with a clarity grade of Slightly Included (SI1-SI3) and a color grade of Near Colorless (G-J). By choosing a slightly lower clarity and color grade, you can find a larger diamond within your budget.

5th C Cost.

Why burn cash?

The most important "C" you have to think about is COST. The few times you usually hear about cost, it is usually as a "salary guideline" or "buying tips" which may include "advice" to spend about two months salary on a diamond engagement ring. The reality is that there's no "guideline". There are too many personal factors to consider.
You know your financial situation better than anyone. You have to decide on a budget for how much you want to spend,

Once you have an idea you can enter our shop and by using the filters adjust until you find your dream diamond, You'll see the benefit of doing business with us.