18K Solid Gold Octagon Natural Diamond Ring
$3,509.00 – $3,609.00
Bold octagon diamond ring in 18k solid gold. Features 0.40 Ct natural diamond in a 4×6 mm bezel setting. GIA & BIS certified, modern yet timeless design.
Ring Size Guide
| US Size | Length (mm) | US Size | Length (mm) | US Size | Length (mm) |
| 3 | 44.1 | 6.25 | 52.6 | 9.50 | 60.9 |
| 3.25 | 44.7 | 6.5 | 53.2 | 9.75 | 61.6 |
| 3.5 | 45.4 | 6.75 | 53.8 | 10 | 62.3 |
| 3.75 | 46 | 7 | 54.5 | 10.25 | 63 |
| 4 | 46.7 | 7.25 | 55 | 10.5 | 63.6 |
| 4.25 | 47.3 | 7.5 | 55.7 | 10.75 | 64.3 |
| 4.5 | 48 | 7.75 | 56.4 | 11 | 65 |
| 4.75 | 48.6 | 8 | 57.1 | 11.25 | 65.6 |
| 5 | 49.32 | 8.25 | 57.8 | 11.5 | 66.2 |
| 5.25 | 49.95 | 8.5 | 58.4 | 11.75 | 66.8 |
| 5.5 | 50.6 | 8.75 | 59 | 12 | 67.5 |
| 5.75 | 51.2 | 9 | 59.6 | 12.5 | 68.8 |
| 6 | 51.9 | 9.25 | 603 | 13 | 70.1 |
Striking in form and timeless in style, the 18k Solid Gold Octagon Natural Diamond Ring brings bold geometry and radiant sparkle together in a distinctive silhouette. At the heart of this piece is a 4×6 mm bezel-set octagon-cut natural diamond, masterfully framed to showcase its faceted brilliance. With a total carat weight of 0.40 ctw, this diamond commands attention with its clean lines and soft edges—making it an exceptional choice for modern brides or anyone drawn to contemporary elegance.
Handcrafted from 18k solid gold in your choice of yellow, white, or rose gold, this ring offers a balanced design with a 1.6 mm band width and a subtle 2.7 mm profile height, ensuring comfort while delivering impact. The GH color and VS-SI clarity diamonds ensure superior brilliance and clarity. Whether worn solo as a statement ring or paired with a contour band, the octagon shape adds a unique edge to your fine jewelry collection.
Certified by GIA and BIS Hallmarked, this piece guarantees the authenticity and quality of both the gold and diamonds used. Your ring will be shipped within 15–25 business days, and our customer support team is available via live chat or video call to guide you through sizing, customization, or any questions you may have.
Bold octagon diamond ring in 18k solid gold. Features 0.40 Ct natural diamond in a 4×6 mm bezel setting. GIA & BIS certified, modern yet timeless design.
Features:
- Metal: 18k Solid Gold (Available in Yellow, White & Rose Gold)
- Natural Diamonds
- Diamond Color & Clarity: GH Color, VS-SI Clarity
- Total Diamond Carat Weight: 0.40 ctw
- Bezel Set: 4 x 6 mm
- Width of the Band: 1.6 mm
- Height of the Band: 2.7 mm
- Certifications: BIS Hallmarked & GIA
- Shipping Time: 15-25 Business Days
- Customer Support: Available via live chats, and video calls.
We offer free shipping across the USA on all orders—no minimum required.
Processing & Handling: 5–10 business days
Shipping Time: 10–15 business days
Total Delivery Time: 15–25 business days from the date of order
Carriers: USPS & UPS
Please inspect your package upon delivery for any damage or tampering before signing.
For assistance, contact us at contact@thekaratstore.us.
Thank you for shopping with The Karat Store US!
We take pride in offering high-quality jewelry and providing the necessary certifications to ensure your peace of mind. Below is a breakdown of the certification process for each product type:
Lab-Grown Solitaire Jewelry: Certified by the International Gemological Institute (IGI) for authenticity and quality.
Gemstone Jewelry: Accompanied by a detailed Gemologist Report.
- Certified by YGA (Your Gemologist Associatio.
- Optional Certification: For IGI or GIA certification, available upon request. Please note that this comes with a 30-40 day waiting period and an additional charge.
Moissanite Jewelry: Certified by the Gemological Research Association (GRA) with a comprehensive report.
For more details, Check out our certification information page.
To keep your jewelry from The Karat Store looking its best, follow these simple care tips:
- Clean Regularly: Use a mild soap and water solution, gently scrub with a soft brush, rinse, and dry with a soft cloth.
- Store Safely: Keep your jewelry in a dry place, in a jewelry box or soft pouch, and separate pieces to avoid scratches.
- Avoid Chemicals: Remove jewelry before swimming or using cleaning products to prevent exposure to harsh chemicals.
- Handle with Care: Avoid wearing jewelry during activities that may cause damage, such as exercising or heavy lifting.
- Inspect Periodically: Check for loose stones or worn settings. Contact us for repairs if needed.
By following these tips, you can ensure your 14k gold jewelry remains beautiful for years to come. For any questions, contact us at thekaratstore@gmail.com.
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