3ct Diamond (Round, 9.37×9.37mm, White) vs 3.5ct Sapphire (Round, 9.08×9.08mm, Blue)
Quick summary: When looked from above (face-up position), 3ct Diamond (9.37×9.37mm, round cut) appears 7% larger than 3.5ct Sapphire (9.08×9.08mm, round cut). See below how they compare side-by-side on a ring and finger.
| 3ct Diamond (round cut) |
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3.5ct Sapphire (round cut) |
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white |
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| 9.37×9.37 mm | 9.08×9.08 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
3ct Diamond Round (9.37×9.37mm, White)
and
3.5ct Sapphire Round (9.08×9.08mm, Blue)
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, Sapphire will face-up smaller than Diamond for a given
carat weight, because it has higher specific gravity
(4 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.
| 3 Ct Diamond (Round) | 3.5 Ct Sapphire (Round) | |
| 9.37×9.37 mm | vs | 9.08×9.08 mm |
| 68.96 mm² | 64.75 mm² |
| 3ct Diamond Round (9.37×9.37mm) | |
| 3.5ct Sapphire Round (9.08×9.08mm) | |
| Difference: 7% (4.21 mm²) |
3ct Diamond (Round, 9.37×9.37mm) has approx. 7% more face-up area than 3.5ct Sapphire (Round, 9.08×9.08mm).
Popular comparisons:
- 3ct Diamond (Round, White, 9.37 x 9.37) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 3ct Diamond (Round, White, 9.37 x 9.37) vs. 3ct Diamond (Oval, White, 11.7 x 7.8)
- 3ct Diamond (Round, White, 9.37 x 9.37) vs. 3ct Diamond (Emerald, White, 9.64 x 7.14)
- 3ct Diamond (Round, White, 9.37 x 9.37) vs. 3ct Sapphire (Round, Blue, 8.62 x 8.62)
- 3ct Diamond (Round, White, 9.37 x 9.37) vs. 5ct Diamond (Round, White, 11.11 x 11.11)
- 3ct Diamond (Round, White, 9.37 x 9.37) vs. 4ct Diamond (Round, White, 10.32 x 10.32)
- 3ct Diamond (Round, White, 9.37 x 9.37) vs. 3ct Diamond (Cushion, White, 8.4 x 8.4)
- 3ct Diamond (Round, White, 9.37 x 9.37) vs. 3.7ct Zircon (Oval, Blue, 11 x 9)
Use the simulator on this page to play around with different ring and finger configurations.