4ct Diamond (Round, 10.32×10.32mm, White) vs 4ct Cubic Zirconia (Round, 8.56×8.56mm, White)
Quick summary: When looked from above (face-up position), 4ct Diamond (10.32×10.32mm, round cut) appears 45% larger than 4ct Cubic Zirconia (8.56×8.56mm, round cut). See below how they compare side-by-side on a ring and finger.
| 4ct Diamond (round cut) |
vs
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4ct Cubic Zirconia (round cut) |
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white |
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| 10.32×10.32 mm | 8.56×8.56 mm | |
| actual size | ||
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Actual size is set for screen
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Ring:
Skin tone:
Ring width: 3.0 mm
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64 mm |
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Actual sizes of
4ct Diamond Round (10.32×10.32mm, White)
and
4ct Cubic Zirconia Round (8.56×8.56mm, White)
as they would appear on a ring and finger.
Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Face-up Size
All things being equal, Cubic Zirconia will face-up smaller than Diamond for a given
carat weight, because it has higher specific gravity
(5.65 vs. 3.52 - this means it's "heavier" compared to Diamond of the same size). Face-up size also depends heavily on the proportions of the cut.
Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.
Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.
| 4 Ct Diamond (Round) | 4 Ct Cubic Zirconia (Round) | |
| 10.32×10.32 mm | vs | 8.56×8.56 mm |
| 83.65 mm² | 57.55 mm² |
| 4ct Diamond Round (10.32×10.32mm) | |
| 4ct Cubic Zirconia Round (8.56×8.56mm) | |
| Difference: 45% (26.1 mm²) |
4ct Diamond (Round, 10.32×10.32mm) has approx. 45% more face-up area than 4ct Cubic Zirconia (Round, 8.56×8.56mm).
Popular comparisons:
- 4ct Diamond (Round, White, 10.32 x 10.32) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4ct Diamond (Round, White, 10.32 x 10.32) vs. 4.5ct Diamond (Round, White, 10.73 x 10.73)
- 4ct Diamond (Round, White, 10.32 x 10.32) vs. 5ct Diamond (Round, White, 11.11 x 11.11)
- 4ct Diamond (Round, White, 10.32 x 10.32) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 4ct Diamond (Round, White, 10.32 x 10.32) vs. 4ct Diamond (Oval, White, 12.89 x 8.59)
- 4ct Diamond (Round, White, 10.32 x 10.32) vs. 0.5ct Sapphire (Round, Blue, 4.75 x 4.75)
- 4ct Diamond (Round, White, 10.32 x 10.32) vs. 3.5ct Diamond (Oval, White, 12.32 x 8.21)
- 4ct Diamond (Round, White, 10.32 x 10.32) vs. 4.5ct Diamond (Emerald, White, 11.6 x 7.75)
- 4ct Diamond (Round, White, 10.32 x 10.32) vs. 8ct Diamond (Round, White, 13 x 13)