0.25ct Sapphire (Oval, 4.77×3.18mm, Blue) vs 0.25ct Diamond (Round, 4.09×4.09mm, White)
Quick summary: When looked from above (face-up position), 0.25ct Diamond (4.09×4.09mm, round cut) appears 6% larger than 0.25ct Sapphire (4.77×3.18mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 0.25ct Sapphire (oval cut) |
vs
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0.25ct Diamond (round cut) |
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blue |
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| 4.77×3.18 mm | 4.09×4.09 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
0.25ct Sapphire Oval (4.77×3.18mm, Blue)
and
0.25ct Diamond Round (4.09×4.09mm, 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, 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.
| 0.25 Ct Sapphire (Oval) | 0.25 Ct Diamond (Round) | |
| 4.77×3.18 mm | vs | 4.09×4.09 mm |
| 12.44 mm² | 13.14 mm² |
| 0.25ct Sapphire Oval (4.77×3.18mm) | |
| 0.25ct Diamond Round (4.09×4.09mm) | |
| Difference: 6% (0.7 mm²) |
0.25ct Diamond (Round, 4.09×4.09mm) has approx. 6% more face-up area than 0.25ct Sapphire (Oval, 4.77×3.18mm).
Popular comparisons:
- 0.25ct Sapphire (Oval, Blue, 4.77 x 3.18) vs. 0.23ct Emerald (Oval, Green, 5.28 x 3.52)
- 0.25ct Sapphire (Oval, Blue, 4.77 x 3.18) vs. 0.5ct Emerald (Round, Green, 5.41 x 5.41)
- 0.25ct Sapphire (Oval, Blue, 4.77 x 3.18) vs. 3ct Sapphire (Oval, Blue, 10.91 x 7.27)
- 0.25ct Sapphire (Oval, Blue, 4.77 x 3.18) vs. 0.5ct Sapphire (Round, Blue, 4.75 x 4.75)
- 0.25ct Sapphire (Oval, Blue, 4.77 x 3.18) vs. 1.1ct Sapphire (Oval, Blue, 8 x 6)
- 0.25ct Sapphire (Oval, Blue, 4.77 x 3.18) vs. 1.1ct Sapphire (Oval, White, 8 x 6)
- 0.25ct Sapphire (Oval, Blue, 4.77 x 3.18) vs. 0.05ct Sapphire (Oval, Blue, 2.79 x 1.86)
- 0.25ct Sapphire (Oval, Blue, 4.77 x 3.18) vs. 2.9ct Sapphire (Cushion, Blue, 7.5 x 8.5)