What Should Ratio Be on a Diamond?

When shopping for a diamond - either natural diamonds OR lab grown diamonds, especially for engagement rings, one critical aspect to consider is the ratio of the diamond. But what exactly is a diamond ratio, and how does it impact the overall look of the stone? The ratio refers to the length-to-width proportion of a diamond, particularly in non-round shapes like oval, marquise, and emerald cuts. A diamond's ratio can significantly affect its visual appeal, elegance, and perceived size.

Choosing the right diamond ratio depends largely on personal preferences and the specific cut you desire. Each diamond shape has its ideal ratio range, creating the perfect balance between symmetry and aesthetics.

The Ideal Diamond Ratios

Understanding the ideal ratios for various diamond shapes helps you select the best stone for your engagement ring or any fine jewelry piece. For round diamonds, the desired ratio is always 1:1, which means the length and width are equal, creating the classic circular shape. However, when it comes to fancy shapes, the ratio is more flexible, depending on your desired look.

• Oval Diamonds: The most popular ratio for an oval diamond is between 1.35 and 1.50. A ratio within this range ensures that the diamond is not too long or too short, achieving an elegant, elongated look.
• Emerald Diamonds: Emerald cut diamonds usually have a ratio between 1.30 and 1.50. A lower ratio offers a squarer appearance, while a higher ratio gives a more rectangular, classic look.
• Marquise Diamonds: The ideal ratio for a marquise diamond falls between 1.75 and 2.25. This range enhances the diamond's distinctive elongated shape while maintaining symmetry.
• Pear Diamonds: Pear-shaped diamonds typically have a ratio of 1.45 to 1.75. This ratio provides a balanced teardrop shape that feels proportional and refined.
• Cushion Cut Diamonds: Cushion cuts often have a ratio between 1.00 and 1.10 for a square look, while ratios closer to 1.15-1.20 create a more rectangular appearance.

Why Diamond Ratio Matters

The diamond ratio is crucial because it affects the stone's overall appearance and balance. A poorly chosen ratio can make a diamond look unbalanced or disproportionate, diminishing its beauty. When selecting a diamond, consider how the ratio complements the setting and the wearer's style. A well-proportioned diamond can enhance its brilliance and symmetry, making it even more stunning.

For example, a perfectly proportioned oval diamond in an engagement ring setting will appear more balanced, while a marquise diamond with the wrong ratio may look too narrow or too wide. By selecting the right ratio, you can ensure that your diamond appears as beautiful and timeless as it should be.

Discover Diamonds with Perfect Ratios

At Robinson's Jewelers, we offer a wide variety of diamonds in different cuts, shapes, and ratios. Whether you are searching for a round-cut diamond with a perfect 1:1 ratio or a marquise-cut diamond with an elongated, graceful look, we have the right stone for your needs.

Explore More at Robinson's Jewelers

Ready to find the perfect diamond with an ideal ratio? Explore our stunning collection of engagement rings and diamonds to discover the piece that fits your style and preferences. Our experts are here to help guide you in selecting the perfect diamond that embodies both elegance and quality.