Round Diamond
The round diamond is the most popular diamond shape for engagement rings, and for good reason. Its 58 facets offer unparalleled brilliance and beauty. The versatile round shape makes it a stunning, classic choice in a wide range of engagement ring styles—from solitaire to vintage designs.
The brilliance of a round cut stone is its most appealing quality. You’ll want to look for an ideal or excellent cut diamond to ensure the most brilliance and beauty.
For Color in Round Cuts, we recommend a G-I grade, but specifically one that appears white in relation to its setting. For Clarity, look for an eye clean stone. In most round diamonds, you can find a VS1 or VS2 diamond that’s eye clean without paying more for a higher clarity grade. For the most aesthetic Round Cut, choose a length to width ratio of 1.00-1.03.
When designing your round cut engagement ring, consider the style you want long-term. If you want a classic look, consider a cathedral or solitaire setting. If you want a modern style, consider a channel set.
Top Recommended Vendors
James Allen 
James Allen is the leader in online diamond sales. Their imaging technology is at the point where it's almost the same as inspecting a diamond with a jeweler's loupe. Their customer experience is best in class, and they have recently upgraded their non-engagement jewelry inventory as well.
James Allen is the leader in online diamond sales. Their imaging technology is at the point where it's almost the same as inspecting a diamond with a jeweler's loupe. Their customer experience is best in class, and they have recently upgraded their non-engagement jewelry inventory as well.What we love about them:
- No questions asked returns within 30 days of shipment. James Allen will send you a paid shipping label to return the ring.
- Lifetime Warranty
- Free International Shipping
- Free prong tightening, repolishing, rhodium plating and cleaning every 6 months
- Provide insurance appraisals
- One free resizing within 60 days of purchase
- Free ring inscriptions
- Best-in-class high quality imagery of all diamonds in stock
- 24/7 Customer Service
- Best-in-class packaging
Blue Nile Blue Nile is the largest and most well known internet jewelry seller. They have the industry-leading largest available exclusive online inventory. Their high quality images are catching up to James Allens' and their prices are amazing.
Blue Nile is the largest and most well known internet jewelry seller. They have the industry-leading largest available exclusive online inventory. Their high quality images are catching up to James Allens' and their prices are amazing. What we love about them:
- No questions asked returns within 30 days of shipment. Blue Nile will send you a paid shipping label to return the ring.
- Lifetime Warranty
- Free Shipping
- Free prong tightening, repolishing, rhodium plating and cleaning every 6 months
- Provide insurance appraisal
- One free resizing within the first year of purchase
- High quality images of about half of their diamonds
- 24/7 Customer Service
- 100% credit towards future upgrades (must be at least double in value)
- Best in class fulfillment