4ct Sapphire (Princess, 8.53×8.53mm, Blue) vs 3ct Diamond (Emerald, 9.64×7.14mm, White)
Quick summary: When looked from above (face-up position), 4ct Sapphire (8.53×8.53mm, princess cut) appears 14% larger than 3ct Diamond (9.64×7.14mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 4ct Sapphire (princess cut) |
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3ct Diamond (emerald cut) |
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| 8.53×8.53 mm | 9.64×7.14 mm | |
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Actual sizes of
4ct Sapphire Princess (8.53×8.53mm, Blue)
and
3ct Diamond Emerald (9.64×7.14mm, 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 Ct Sapphire (Princess) | 3 Ct Diamond (Emerald) | |
| 8.53×8.53 mm | vs | 9.64×7.14 mm |
| 72.76 mm² | 64.01 mm² |
| 4ct Sapphire Princess (8.53×8.53mm) | |
| 3ct Diamond Emerald (9.64×7.14mm) | |
| Difference: 14% (8.75 mm²) |
4ct Sapphire Princess (8.53×8.53mm) has approx. 14% more face-up area than 3ct Diamond Emerald (9.64×7.14mm).
Popular comparisons:
- 4ct Sapphire (Princess, Blue, 8.53 x 8.53) vs. 4ct Emerald (Princess, Green, 9.73 x 9.73)
- 4ct Sapphire (Princess, Blue, 8.53 x 8.53) vs. 3.34ct Sapphire (Emerald, Blue, 9.54 x 7.07)
- 4ct Sapphire (Princess, Blue, 8.53 x 8.53) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 1ct Sapphire (Princess, White, 5.37 x 5.37) vs. 1ct Diamond (Princess, White, 5.51 x 5.51)
- 0.5ct Sapphire (Princess, Dark Blue, 4.27 x 4.27) vs. 0.2ct Sapphire (Princess, Dark Blue, 3.14 x 3.14)
- 2ct Sapphire (Princess, Blue, 6.77 x 6.77) vs. 2ct Diamond (Princess, White, 6.94 x 6.94)
- 35ct Sapphire (Princess, Light Violet, 17.58 x 17.58) vs. 35ct Sapphire (Emerald, Blue, 20.88 x 15.47)
- 2ct Sapphire (Princess, Blue, 6.77 x 6.77) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
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Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.