0.25ct Sapphire (Round, 3.77×3.77mm, Blue) vs 0.2ct Diamond (Round, 3.8×3.8mm, White)
Quick summary: When looked from above (face-up position), 0.2ct Diamond (3.8×3.8mm, round cut) appears 2% larger than 0.25ct Sapphire (3.77×3.77mm, round cut). See below how they compare side-by-side on a ring and finger.
| 0.25ct Sapphire (round cut) |
vs
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0.2ct Diamond (round cut) |
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blue |
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| 3.77×3.77 mm | 3.8×3.8 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 Round (3.77×3.77mm, Blue)
and
0.2ct Diamond Round (3.8×3.8mm, 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 (Round) | 0.2 Ct Diamond (Round) | |
| 3.77×3.77 mm | vs | 3.8×3.8 mm |
| 11.16 mm² | 11.34 mm² |
| 0.25ct Sapphire Round (3.77×3.77mm) | |
| 0.2ct Diamond Round (3.8×3.8mm) | |
| Difference: 2% (0.18 mm²) |
0.2ct Diamond (Round, 3.8×3.8mm) has approx. 2% more face-up area than 0.25ct Sapphire (Round, 3.77×3.77mm).
Popular comparisons:
- 0.25ct Sapphire (Round, Blue, 3.77 x 3.77) vs. 0.5ct Sapphire (Round, Blue, 4.75 x 4.75)
- 0.25ct Sapphire (Round, Blue, 3.77 x 3.77) vs. 0.25ct Diamond (Round, White, 4.09 x 4.09)
- 0.25ct Sapphire (Round, Blue, 3.77 x 3.77) vs. 0.16ct Sapphire (Round, Blue, 3 x 3)
- 0.25ct Sapphire (Round, Blue, 3.77 x 3.77) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.25ct Sapphire (Round, Blue, 3.77 x 3.77) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 0.25ct Sapphire (Round, Blue, 3.77 x 3.77) vs. 1ct Diamond (Cushion, White, 5.83 x 5.83)
- 0.25ct Sapphire (Round, Blue, 3.77 x 3.77) vs. 1.43ct Sapphire (Cabochon, Blue, 7.71 x 5.14)
- 0.25ct Sapphire (Round, Blue, 3.77 x 3.77) vs. 0.33ct Sapphire (Round, Blue, 4.13 x 4.13)