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Radiant Cut Diamond Buying Guide

Updated: Apr 14

Introduction to Radiant Cut Diamonds:

Radiant cut diamonds hold a special allure, blending the elegance of emerald cuts with the brilliance of round brilliants. Their unique facet pattern and trimmed corners make them a captivating choice for those seeking a balance between traditional and modern aesthetics. Whether you're considering a radiant cut diamond for an engagement ring, anniversary gift, or personal indulgence, understanding the intricacies of these gemstones is essential to making an informed and rewarding purchase.

1. Anatomy of a Radiant Cut Diamond:

- Shape: Radiant cut diamonds feature a rectangular or square shape with cropped corners, giving them a distinct appearance. The geometric symmetry of radiant cuts enhances their versatility, making them suitable for various jewelry designs.

- Facet Pattern: With approximately 70 facets, radiant cut diamonds boast a combination of step-cut and brilliant-cut facets. This intricate arrangement maximizes light reflection and refraction, resulting in exceptional brilliance and sparkle.

- Length-to-Width Ratio: The length-to-width ratio influences the overall appearance of a radiant cut diamond. While some prefer a more elongated rectangular shape, others gravitate towards square or nearly square proportions. Finding the ideal ratio is crucial to achieving the desired aesthetic.

2. Evaluating the Cut of Radiant Cut Diamonds:

- Unlike round brilliants or princess cuts, radiant cut diamonds do not receive an official cut grade from gemological laboratories such as GIA. Therefore, it's essential to assess the cut quality visually, paying attention to specific parameters.

- Table Percentage: The table percentage refers to the ratio of the width of the diamond's table (the top flat surface) to the width of the entire diamond. Optimal table percentages for radiant cut diamonds fall within the range of 61-69% for excellent cut quality.

- Depth Percentage: Depth percentage indicates the depth of the diamond relative to its width. For radiant cut diamonds, ideal depth percentages typically range from 61-67% for excellent cut quality.

- Girdle Thickness: The girdle of a radiant cut diamond can vary from very thin to very thick. It's essential to ensure the girdle is proportionate and uniform around the entire circumference of the stone.

- Culet Size: The culet is the small facet at the bottom of the diamond's pavilion. Ideally, radiant cut diamonds should have no culet or a very small culet for optimal light reflection and brilliance.

- Symmetry of Corners: Pay close attention to the corners of the radiant cut diamond, ensuring they are even and proportionate. The cropped corners of the radiant cut contribute to its stability and aesthetic appeal, but they must also be symmetrical to maintain overall beauty.

3. Additional Considerations:

- Fluorescence: Some radiant cut diamonds exhibit fluorescence under ultraviolet light, emitting a soft glow. While faint to medium fluorescence has minimal impact on appearance, strong fluorescence may affect transparency. Choose a fluorescence grade that aligns with your preferences.

- Certification: Purchase radiant cut diamonds accompanied by reputable diamond grading reports from recognized laboratories such as GIA or AGS. These reports provide detailed assessments of the diamond's characteristics, ensuring transparency and authenticity.

- Budget: Establish a budget before embarking on your diamond search, considering factors such as carat weight, cut quality, clarity, and color. Balance your priorities to maximize value while staying within your financial means.

- Setting: Select a setting that complements the radiant cut diamond's shape and enhances its beauty. Whether it's a classic solitaire, elaborate halo, or intricate pave design, the setting should reflect your personal style and showcase the diamond to its fullest potential.

4. Shopping Tips:

- Research Reputable Retailers: Explore reputable jewelers and online retailers with a track record of integrity and customer satisfaction. Read reviews, seek recommendations, and verify certifications to ensure a reliable and trustworthy purchasing experience.

- Compare Prices: Compare prices from multiple sources to gauge market value and identify competitive offers. Be mindful of factors such as diamond quality, retailer reputation, and additional services included in the purchase.

- Seek Expert Advice: Consult with knowledgeable professionals, such as gemologists or certified diamond experts, to gain insights and guidance tailored to your preferences. Their expertise can help navigate the complexities of diamond selection and ensure a confident decision.

- Inspect the Diamond: If possible, examine the radiant cut diamond in person or request detailed images to assess its characteristics closely. Look for any visible flaws or irregularities that may impact its beauty or value, ensuring alignment with your expectations.

5. After Purchase:

- Insurance: Protect your investment by obtaining insurance coverage for your radiant cut diamond. Many insurers offer specialized policies for jewelry, safeguarding against loss, theft, or damage.

- Regular Maintenance: Preserve the brilliance and beauty of your radiant cut diamond through regular cleaning and maintenance. Avoid exposure to harsh chemicals, extreme temperatures, and abrasive surfaces, and schedule professional inspections and cleanings as needed.

- Appraisal: Have your radiant cut diamond appraised by a certified gemologist to establish its current market value accurately. An official appraisal certificate is essential for insurance purposes and provides peace of mind regarding the diamond's worth.

6. Customization Options:

- Fancy Colored Diamonds: Consider exploring fancy colored radiant cut diamonds for a distinctive and personalized touch. From vivid yellows and pinks to mesmerizing blues and greens, fancy colored diamonds offer endless possibilities for unique jewelry creations.

- Custom Settings: Collaborate with skilled jewelers to create custom settings that complement your radiant cut diamond. Whether you envision a modern masterpiece or a vintage-inspired treasure, customization allows you to tailor every aspect of your jewelry piece to your preferences.

7. Diamond Education Resources:

- Online Resources: Take advantage of online guides, articles, and educational materials provided by reputable organizations such as GIA and AGS. These resources offer valuable insights into diamond characteristics, grading standards, and consumer tips.

- Consultation Services: If you're uncertain about your diamond selection you can book a complimentary consultation with us to dive deeper into radiant cut diamonds and more.


Purchasing a radiant cut diamond is a significant decision that warrants careful consideration of various factors, including visual assessment of cut quality, additional considerations, shopping tips, and customization options. By equipping yourself with knowledge and guidance from this comprehensive buying guide, you can confidently navigate the diamond market and select a radiant cut diamond that resonates with your style, preferences, and budget. With proper care and appreciation, your radiant cut diamond will continue to captivate hearts and spark conversations for generations to come.

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