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An 8 carat diamond ring is the definition of breathtaking elegance — a rare size that radiates grandeur while still being wearable for special occasions or every day. For those seeking the highest standards in lab-grown diamonds, the 8 Carat Diamond Ring Price for a colourless (D–F), VS–VVS clarity, excellent cut stone set in solid 14KT gold, complete with IGI certification, typically ranges from $11,000–$12,000 USD or £9,020–£9,840 GBP.
A diamond of this scale makes a powerful style statement, symbolising success, love, and milestone celebrations. In this guide, we’ll walk you through exactly what owning an 8 carat lab diamond ring means — from understanding its size and price factors to carat comparisons, shape recommendations, setting styles, and customisation options. Whether you’re weighing the impact of a bold halo-set oval or envisioning a sleek solitaire emerald, our buying tips will help you choose a ring that reflects your story while maximising beauty and value.
How Big is an 8ct Lab Diamond? (Measurements Explained)
For many shoppers, the question “How big is an 8 carat diamond?” blends curiosity with excitement. One carat equals 200 milligrams, so an 8-carat stone weighs about 1.6 grams. That weight converts into impressive visual size — but exactly how it looks depends on the diamond’s cut and shape.
A round brilliant 8 carat lab diamond typically measures about 13.0 to 13.2 mm across. An oval of the same weight appears noticeably larger because its elongated surface spreads more on the finger, while cushion cuts tend to look smaller since more of the carat weight rests in depth rather than width.
| Carat Weight | Approx. Diameter (Round Brilliant, mm) |
|---|---|
| 1 ct | 6.4 mm |
| 2 ct | 8.2 mm |
| 3 ct | 9.3 mm |
| 4 ct | 10.2 mm |
| 5 ct | 11.2 mm |
| 6 ct | 11.8–12.0 mm |
| 7 ct | 12.4–12.7 mm |
| 8 ct | 13.0–13.2 mm |
Remember, weight vs visible size isn’t linear. A 2 carat diamond doesn’t appear twice as large as a 1 carat — it’s about 50% bigger. By 8 carats, the stone’s presence is unmistakable, yet proportions in the cut keep it wearable and balanced.
How Much is an 8 Carat Diamond Ring Price and Worth?
For a top-quality 8 carat lab-grown diamond ring, expect a price range of $11,000–$12,000 USD or £9,020–£9,840 GBP. That investment reflects precise craftsmanship and strict grading in the 4 Cs:
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Cut: The most important factor for sparkle; choose “Excellent” or “Ideal.”
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Colour: D–F grades deliver pure, icy brilliance.
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Clarity: VS–VVS ensures no visible flaws to the naked eye.
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Carat: At 8 ct, the diamond offers unmatched presence and prestige.
Lab-grown diamonds provide identical composition and beauty to mined stones at 40–60% lower cost, with guaranteed certification and ethical sourcing. This makes acquiring a large carat weight more attainable while maintaining premium quality.
Read more: Lab Grown Diamonds
7 Carat vs 8 Carat vs 9 Carat Lab Grown Diamonds Price Comparison
When deciding on carat size, comparing nearby weights helps balance impact with budget.
| Carat Weight | Avg. Size (mm) | Price Range (USD) | Other Popular Shapes | Lifestyle Fit |
|---|---|---|---|---|
| 7 ct | 12.4–12.7 mm | $10,000 – $11,000 | Pear (elongates finger), Cushion (soft glow), Princess (sharp angles) | Versatile, strong statement |
| 8 ct | 13.0–13.2 mm | $11,000 – $12,000 | Round (classic brilliance), Oval (faces larger), Emerald (clean elegance) | Balanced blend of impact & wearability |
| 9 ct | 13.5–13.7 mm | $12,000 – $13,000 | Round (showpiece), Radiant (modern sparkle), Pear (dramatic length) | Bold luxury, high visibility |
Price jumps aren’t proportional — rarity and higher demand for larger stones create a premium. Shapes like oval and pear can make smaller carats appear larger, while elongated cushion and radiant cuts offer graceful length without major cost increases. Lifestyle tip: choose 7 ct for elegance, 8 ct for perfect balance, or 9 ct for luxury at full scale.
Which Diamond Shapes are Best for 8 Carat Engagement Rings?
An 8 carat stone looks spectacular in nearly any shape — but specific cuts enhance certain qualities:
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Round Brilliant: Maximises light return for unparalleled sparkle.
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Oval: Appears larger and elongates the finger elegantly.
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Princess: Sharp, modern edges with dazzling contrast.
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Cushion: Romantic curves with a vintage soft glow.
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Emerald: Sophisticated lines highlight flawless clarity.
Rounds tend to cost more due to precision faceting and high demand. Fancy shapes like cushion, oval, or emerald may provide more visible size while optimising budget, especially at larger carats.
Explore options: Engagement Rings Collection
Best Buying Tips for 8 Carat Lab Diamond Rings
A few smart choices can ensure your 8 carat ring delivers maximum beauty and value:
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Prioritise cut — sparkle is non-negotiable at this size.
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Select colourless (D–F) for a crisp, white glow.
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Stick with VS–VVS clarity for stunning transparency.
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Remember: lab-grown diamonds offer 40–60% savings.
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Match shape to hand proportions and lifestyle.
For example, an oval may give the perception of a 9 ct size without the extra cost, leaving budget for a custom-designed band or setting.
Find your fit: Find Your Ring Size
Popular Settings for 8 Carat Diamond Rings
Your chosen setting will define the personality and perceived size of your ring:
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Solitaire: Minimalist focus on the centre stone’s grandeur.
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Halo: Surrounding diamonds magnify size and sparkle.
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Pavé: Band of diamonds adds shimmer from every angle.
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Three-Stone: Celebrates relationships with symbolic elegance.
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Minimalist: Understated luxury for modern tastes.
A halo can make the diamond look even larger, while a solitaire displays purity and proportion.
Image Alt: 8 Carat Diamond Ring in Halo Setting
Custom-Made 8 Carat Lab Diamond Rings
Customisation offers complete control over aesthetics, comfort, and cost. With a one-of-a-kind design, you can select the ideal shape, metal, setting style, and even special engraving to make your ring truly yours.
We provide loose diamond sourcing, CAD design previews, and handcrafted settings to bring your exact vision into reality. Personalising a ring of this scale ensures a perfect fit for your lifestyle and taste.
Create yours: Custom Jewelry
Work with us to design an 8 Carat diamond ring that tells your unique story.
FAQs about 8 Carat Diamond Rings
How much does an 8 Carat diamond ring cost?
$11,000–$12,000 USD or £9,020–£9,840 GBP for a D–F colour, VS–VVS clarity, excellent cut lab-grown diamond in 14KT gold.
How big is an 8 Carat diamond in mm?
A round brilliant measures about 13.0–13.2 mm.
Is 8 Carat a good size for an engagement ring?
Yes — it’s bold yet balanced for both dramatic and refined styles.
Are 8 Carat lab-grown diamonds cheaper?
Yes, they cost 40–60% less than mined diamonds of the same grade.
Which settings make an 8 Carat diamond look bigger?
Halo, oval, and pear designs enhance perceived size beautifully.
Conclusion
Choosing an 8 carat lab-grown diamond ring is about embracing prestige and personality. It’s the perfect balance of luxury and wearability, with craftsmanship and ethical origins you can be proud of.
We make finding or designing your dream piece simple and inspiring. Explore our curated 8 Carat Diamond Rings to find the style that celebrates your story.Shop Now → https://gilibili.com/pages/engagement-rings
Connect via WhatsApp at +91 8200212331 - click to chat for (instant reply) or email hello@gilibili.com (reply within 2 days) for personalised quotes and guidance. Whether you’re searching for a loose diamond, a custom masterpiece, or an iconic engagement ring — we’ll make it happen.