Heptalogy Oval Diamond Engagement Ring
Ring Size Chart
Find below a conversion chart for ring sizes. Please note, this should only act as a guide and sizing will differ depending on the brand and style.
MM | 12.45 | 12.85 | 13.26 | 13.67 | 14.07 | 14.48 | 14.88 | 15.29 | 15.49 | 15.9 |
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US | 1 | 1½ | 2 | 2½ | 3 | 3½ | 4 | 4½ | 4¾ | 5¼ |
NZ/UK | B | C | D | E | F | G | H | I | J | K |
MM | 16.31 | 16.71 | 17.12 | 17.53 | 17.93 | 18.34 | 18.75 | 19.15 | 19.56 |
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US | 5¾ | 6¼ | 6¾ | 7¼ | 7¾ | 8¼ | 8¾ | 9¼ | 9¾ |
NZ/UK | L | M | N | O | P | Q | R | S | T |
MM | 19.96 | 20.37 | 20.78 | 21.18 | 21.59 | 21.79 | 22.4 | 22.81 | 23.01 | 23.42 |
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US | 10¼ | 10¾ | 11¼ | 11¾ | 12¼ | 12½ | 13¼ | 13¾ | 14 | 14½ |
NZ/UK | U | V | W | X | Y | Z | Z+1 | Z+2 | Z+3 | Z+4 |
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Heptalogy Oval Engagement Ring
Elevate your love story with the Heptalogy Oval Engagement Ring—a masterpiece of balance, brilliance, and craftsmanship. Designed for the modern woman who appreciates both tradition and innovation, this ring features a stunning oval-cut center diamond (lab-grown or natural) flanked by six marquise-cut side stones. Whether in warm 18K gold or sleek platinum, each variant radiates timeless elegance and unmatched sparkle.
Feature |
Natural Diamond |
Lab-Grown Diamond |
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Origin |
Earth-formed over billions of years |
Grown in a lab using CVD or HPHT technology |
Certification |
GIA (Gemological Institute of America) |
IGI (International Gemological Institute) |
Carat |
0.7ct-5ct |
7ct-5ct |
Color Range |
D |
D |
Clarity Range |
VVS1 |
VVS2 |
Brilliance |
Exceptional brilliance with unique character |
Virtually identical brilliance, more consistency |
Rarity |
Naturally rare and finite |
Consistently available |
Sourcing |
Conflict-free, ethically mined |
Ethically produced with minimal environmental impact |
Key Features
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Center Stone:
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Choice of 0.70–5.0 ct oval-cut diamond (IGI-lab-grown or GIA-certified natural)
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Side Stones:
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Six perfectly matched 0.08–0.15 ct marquise-cut diamonds arranged in a harmonious “heptalogy” layout
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Metal Options:
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18K Yellow Gold for a classic, romantic glow
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18K White Gold for cool, contemporary brilliance
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Platinum for enduring strength and a silvery sheen
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Setting Style:
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Secure six-prong cathedral setting, allowing maximum light entry and exceptional fire
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Certification & Ethics:
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Lab-grown diamonds come with IGI certification, natural diamonds are GIA-certified and ethically sourced
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All metals are conflict-free and recycled where possible
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Why You’ll Love It
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Unique Heptalogy Design
The name “Heptalogy” refers to the seven-stone composition—one oval center and six marquise side stones—symbolising unity and never-ending love. Each marquise is precisely angled to create a halo of light around the center, amplifying brilliance from every angle.
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Customizable to Your Taste
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Diamond Choice: Opt for a lab-grown diamond (identical to earth-mined in clarity and sparkle) or choose a natural diamond if you prefer a timeless heirloom.
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Metal Finish: Warm yellow gold whispers tradition; white gold offers versatility; platinum delivers unmatched durability.
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Sizing & Carats: Select your perfect carat sizes to match your personal style and budget.
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Ethical & Sustainable
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Every lab-grown diamond option is eco-friendly, produced with minimal environmental impact.
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Natural diamonds are hand-selected from conflict-free sources, ensuring you own a piece with a transparent origin.
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Expert Craftsmanship
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Hand-set by our master artisans at Raphana Jewellery, each ring undergoes meticulous polishing, prong adjustment, and quality checks.
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The contoured band is gently tapered for comfortable all-day wear, while the elevated cathedral setting enhances light performance.
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Order this piece online today! Crafted with care, it takes 6 weeks to create. Need it sooner or want a personal touch? Contact us—we’re happy to make it perfect for you!