How to Choose a Loose Diamond

Loose diamonds

When it comes to choosing the picture-perfect engagement ring, many people assume choosing a pre-designed ring is the way to go. But, designing a custom engagement ring is actually quite affordable when working with a diamond broker like The Diamond Reserve. The first step in designing a custom engagement ring is to choose the perfect loose diamond to place in a setting of your choice.

The Four C’s of Quality

When it comes to choosing a quality diamond, you will want to refer to the “Four C’s of diamond quality” laid forth by the GIA.  The Color, cut, clarity, and carat weight of the diamond are all important factors when it comes to determining the stone’s worth. Let’s look at each one in detail.


The color of your diamond is crucial because it affects the amount of shine and brilliance that the stone is able to achieve. Color grades range from D to Z.  D class diamonds are the highest classification and are colorless, whereas Z class diamonds have a yellowish or brown hue. True fancy diamonds ( pink, blue, yellow, etc.) are graded on a separate color scale. These are unique and rare, but colorless diamonds are the most expensive due to their extreme transparency and natural beauty. When choosing the color grade for your diamond we recommend staying between D and J color.


When it comes to identifying the cut of a diamond, the average person equates the shape of the diamond with the cut, but this is not the case. Part of what is most appealing about diamonds is their ability to transmit light and sparkle so intensely. It is the diamond’s cut that determines just how brilliant it shines.  By examining a combination of factors like facet shapes, angles, girdle width, culet size, polish and symmetry, diamond experts are able to determine a diamond’s grade. Once these factors are taken into consideration, the diamond is graded from Excellent to Poor. When choosing the cut grade of your diamond we only recommend purchasing Excellent or Very Good.


Referring to the degree of imperfections a diamond has, clarity is an important aspect of the four C’s as it is one of the most visible to even a layman. During their formation, the extreme heat and pressure cause “birthmarks” to form on the stone. These small imperfections (called inclusions) inside the diamond or on the surface ( called blemishes) affect the overall clarity of the diamond.  Often not visible to the naked eye, these blemishes or inclusions can interfere with the path of light through the diamond. Affecting the stones overall brilliance.

Almost all diamonds are graded for clarity using the 11 point diamond clarity scale ( FL-SI2) created by the GIA, In grading diamond clarity, the GIA considers the number, size, color, reflectivity, and position of every flaw visible under 10x magnification.

Carat Weight

The carat weight is another valuable asset of your diamond. It is a measure of the diamond’s weight or mass. If carat weight increases, the size of the diamond also increases.

How to Prioritize

The key to finding the best quality is to prioritize what is most important to you and to choose the best diamond broker to help you find the perfect diamond for your engagement.

The Perfect Diamond

It’s true there is no “perfect” diamond. Even the best stones have tiny flaws. That’s what makes them unique and natural.  At The Diamond Reserve, we only carry the very best GIA certified loose diamond, making the choosing process that much easier. If we don’t have the diamond that speaks you we help you to determine the quality factors that matter the most to you and curate you a selection of diamond that fit your needs and budget.

Your engagement ring is too special to settle. Let us help you find your perfect diamond.