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0.4ct Diamond (Emerald, 5×3.31mm, White) vs 2.52ct Sapphire (Emerald, 8.32×6.4mm, Blue)


Quick summary: When looked from above (face-up position), 2.52ct Sapphire (8.32×6.4mm, emerald cut) appears 3.2 times larger than 0.4ct Diamond (5×3.31mm, emerald cut). See below how they compare side-by-side on a ring and finger.

0.4ct Diamond (emerald cut)
vs
 2.52ct Sapphire (emerald cut)
white
 
blue
5×3.31 mm 8.32×6.4 mm
actual size
Actual size of 0.4ct Diamond (emerald cut, 5×3.31mm, White color)   Actual size of 2.52ct Sapphire (emerald cut, 8.32×6.4mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.4ct Diamond (emerald cut, 5×3.31mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 2.52ct Sapphire (emerald cut, 8.32×6.4mm) on a right ring and finger
Your settings
Ring
 Gold
Skin tone
 Light
Ring diameter
 16.9 mm
Ring width
 3.0 mm
Finger length
 64 mm
Finger coverage
 20% vs 38%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.4ct Diamond Emerald (5×3.31mm, White) and 2.52ct Sapphire Emerald (8.32×6.4mm, Blue) 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.


0.4 Ct Diamond (Emerald) 2.52 Ct Sapphire (Emerald)
5×3.31 mm vs 8.32×6.4 mm
15.39 mm²   49.52 mm²
Face-up size outline for 2.52ct Sapphire (8.32×6.4mm, emerald cut)
Face-up size outline for 0.4ct Diamond (5×3.31mm, emerald cut)
0.4ct Diamond Emerald (5×3.31mm)
2.52ct Sapphire Emerald (8.32×6.4mm)
Difference: 222% (34.13 mm²)
2.52ct Sapphire (Emerald, 8.32×6.4mm) has approx. 222% more face-up area than 0.4ct Diamond (Emerald, 5×3.31mm). In other words, it's 3.22x larger.


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