1ct Sapphire (Pear, 8.3×5mm, Dark Blue) vs 0.25ct Diamond (Round, 4.09×4.09mm, White)
Quick summary: When looked from above (face-up position), 1ct Sapphire (8.3×5mm, pear cut) appears 2.3 times larger than 0.25ct Diamond (4.09×4.09mm, round cut). See below how they compare side-by-side on a ring and finger.
| 1ct Sapphire (pear cut) |
vs
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0.25ct Diamond (round cut) |
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dark blue |
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| 8.3×5 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
1ct Sapphire Pear (8.3×5mm, Dark 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.
| 1 Ct Sapphire (Pear) | 0.25 Ct Diamond (Round) | |
| 8.3×5 mm | vs | 4.09×4.09 mm |
| 30.3 mm² | 13.14 mm² |
| 1ct Sapphire Pear (8.3×5mm) | |
| 0.25ct Diamond Round (4.09×4.09mm) | |
| Difference: 131% (17.16 mm²) |
1ct Sapphire (Pear, 8.3×5mm) has approx. 131% more face-up area than 0.25ct Diamond (Round, 4.09×4.09mm). In other words, it's 2.31x larger.
Popular comparisons:
- 1ct Sapphire (Pear, Dark Blue, 8.3 x 5) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 1ct Sapphire (Pear, Dark Blue, 8.3 x 5) vs. 0.5ct Diamond (Round, White, 5.16 x 5.16)
- 1ct Sapphire (Pear, Dark Blue, 8.3 x 5) vs. 0.2ct Diamond (Round, White, 3.8 x 3.8)
- 1ct Sapphire (Pear, Dark Blue, 8.3 x 5) vs. 0.1ct Diamond (Round, White, 3.02 x 3.02)
- 1ct Sapphire (Pear, Dark Blue, 8.3 x 5) vs. 0.05ct Diamond (Round, White, 2.39 x 2.39)
- 1ct Sapphire (Pear, Dark Blue, 8.3 x 5) vs. 2ct Diamond (Cushion, Light Violet, 7.34 x 7.34)
- 1.93ct Sapphire (Pear, Blue, 9 x 6) vs. 3ct Sapphire (Pear, Blue, 10 x 7)
- 2ct Sapphire (Pear, Blue, 10.46 x 6.3) vs. 1.6ct Diamond (Round, White, 7.6 x 7.6)