4.5ct Sapphire (Emerald, 10.54×7.81mm, Blue) vs 2ct Diamond (Round, 8.19×8.19mm, White)
Quick summary: When looked from above (face-up position), 4.5ct Sapphire (10.54×7.81mm, emerald cut) appears 45% larger than 2ct Diamond (8.19×8.19mm, round cut). See below how they compare side-by-side on a ring and finger.
| 4.5ct Sapphire (emerald cut) |
vs
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2ct Diamond (round cut) |
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blue |
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| 10.54×7.81 mm | 8.19×8.19 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
4.5ct Sapphire Emerald (10.54×7.81mm, Blue)
and
2ct Diamond Round (8.19×8.19mm, 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.
| 4.5 Ct Sapphire (Emerald) | 2 Ct Diamond (Round) | |
| 10.54×7.81 mm | vs | 8.19×8.19 mm |
| 76.56 mm² | 52.68 mm² |
| 4.5ct Sapphire Emerald (10.54×7.81mm) | |
| 2ct Diamond Round (8.19×8.19mm) | |
| Difference: 45% (23.88 mm²) |
4.5ct Sapphire (Emerald, 10.54×7.81mm) has approx. 45% more face-up area than 2ct Diamond (Round, 8.19×8.19mm).
Popular comparisons:
- 4.5ct Sapphire (Emerald, Blue, 10.54 x 7.81) vs. 4.5ct Diamond (Emerald, White, 11.03 x 8.17)
- 4.5ct Sapphire (Emerald, Blue, 10.54 x 7.81) vs. 5ct Sapphire (Emerald, Blue, 10.92 x 8.09)
- 4.5ct Sapphire (Emerald, Blue, 10.54 x 7.81) vs. 2ct Diamond (Emerald, White, 8.42 x 6.24)
- 4.5ct Sapphire (Emerald, Blue, 10.54 x 7.81) vs. 4.5ct Peridot (Emerald, Green, 11.18 x 8.28)
- 4.5ct Sapphire (Emerald, Blue, 10.54 x 7.81) vs. 4.5ct Diamond (Oval, White, 13.4 x 8.93)
- 1ct Sapphire (Emerald, Blue, 7 x 5) vs. 1ct Sapphire (Oval, Blue, 7 x 5)
- 2ct Sapphire (Emerald, Blue, 8.05 x 5.96) vs. 2ct Diamond (Emerald, White, 8.42 x 6.24)
- 2ct Sapphire (Emerald, Blue, 8.05 x 5.96) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)