18 Carat Diamond (Round, 17.03mm, White)
Color:
Actual size is set for screen
How big is an 18 carat round-cut Diamond?
It depends on the cut proportions, but typically an 18ct round-cut Diamond would measure around 17.03 mm (±3%) in diameter. You can check the finger coverage in the simulator below.
Ring:
Skin tone:
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Ring width:
3.0 mm
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Saved...
64 mm
| Your settings | |
|---|---|
Ring |
Gold |
Skin tone |
Light |
Ring diameter |
16.9 mm |
Ring width |
3.0 mm |
Finger length |
64 mm |
Finger coverage |
101 % |
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Saved...
|
|
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Ring diameter:
16.9 mm
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Additional Info
Diamond is the hardest natural material (nothing can scratch it, but another diamond) and a very attractive and expensive gem. Diamonds can occur in a whole spectrum of colors, although white or colorless are the most popular.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Gem Details
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Name:
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Diamond |
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Shape:
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Round |
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Chemical Formula:
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C |
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Crystal Structure:
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Isometric |
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Hardness:
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10 |
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Specific Gravity
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3.52 |
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Carat weight:
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18 ct |
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Gram weight:
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3.6 g (0.127 ounces) |
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Points:
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1800 pts |
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Length:
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17.03 mm |
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Width:
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17.03 mm |
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Average diameter:
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17.03 mm |
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Est. face-up size:
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227.78 mm² |
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Volume:
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1022.73 mm³ |
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Length-to-width ratio:
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1 |
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Refractive Index:
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2.417 - 2.419 |
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Luster:
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Adamantine |
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Wearability:
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Excellent |
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Care Instructions:
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No special or unusual care |
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Color:
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Diamond can be found in the following colors:
                               
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Birthstone:
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Diamond is a birthstone for the month of April |
Popular comparisons:
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 1ct Emerald (Round, Green, 6.82 x 6.82)
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 0.16ct Diamond (Round, White, 3.53 x 3.53)
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 4ct Diamond (Oval, White, 12.89 x 8.59)
- 18ct Diamond (Round, White, 17.03 x 17.03) vs. 22ct Diamond (Round, White, 18.21 x 18.21)
- 0.1ct Diamond (Round, White, 3.02 x 3.02) vs. 0.15ct Diamond (Round, White, 3.45 x 3.45)
- 1.5ct Diamond (Round, White, 7.5 x 7.5) vs. 2ct Diamond (Round, White, 8 x 8)
Use the simulator on this page to play around with different ring and finger configurations.