Understanding Lab-Grown Diamond Ratios
When designing your forever ring, every detail matters, and that includes your diamond’s ratio. While often overlooked, gemstone ratios are essential to the overall look and feel of your lab-grown diamond. The ratio refers to the length divided by the width of the stone, and it plays a key role in how your diamond appears on the hand, whether more elongated, perfectly balanced, or softly compact.
Though the difference between ratios might seem subtle at first glance, they can have a meaningful visual impact. Choosing your desired lab-grown diamond ratio can add a beautiful layer of personalisation to your engagement ring.
At TMC Fine Jewellers, we know that pictures often speak louder than words, which is why we’ve created visual guides to help you better understand how each ratio presents across some of our most beloved lab-grown diamond cuts.
Oval diamonds are adored for their soft curves and graceful silhouette. Depending on the ratio, the same shape can appear more rounded and classic, or longer and more slender, offering a beautifully elongated effect on the finger. Pictured is a range from 1.25 to 1.60.
Emerald cuts, with their elegant step-cut facets and clean lines, offer an equally refined aesthetic. For an emerald cut, lower ratios create a squarer feel, while higher ratios enhance that timeless elongation the emerald cut is known and loved for.
The radiant cut brings together brilliance and structure like few other shapes. With ratios ranging from 1.25 to 1.60, it offers beautiful versatility. Lower ratios create a balanced, softly structured silhouette, while higher ratios deliver a refined, elongated look.
Similarly, the pear cut, pictured below with ratios ranging from 1.40 to 1.70, offers an incredible blend of marquise and round silhouettes. Lower ratios create a fuller, more rounded shape that feels classic and romantic, while higher ratios result in a longer, tapered look that beautifully elongates the hand.
Typically ranging from 1.75 to 2.25, marquise lab-grown diamonds with a higher ratio feel distinctly elongated, while those with a lower ratio present a more balanced and softened silhouette.
Cushion cuts are adored for their vintage charm and softly rounded edges. Their ratios typically range from 1.00, offering a perfectly square silhouette, to 1.20 for a more elongated, rectangular look.
Your ring should be as unique as your love. Our team of expert jewellery consultants are here to journey with you. Secure your consultation in our Brisbane or Sydney showrooms, or virtually from anywhere in the world to find your perfect lab-grown diamond.
TMC Fine Jewellers. Crafted for you forever.
