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0.25ct Diamond (Trillion, 4.87×4.87mm, White) vs 1ct Sapphire (Emerald, 5×5mm, White)


Quick summary: When looked from above (face-up position), 1ct Sapphire (5×5mm, emerald cut) appears 58% larger than 0.25ct Diamond (4.87×4.87mm, trillion cut). See below how they compare side-by-side on a ring and finger.

0.25ct Diamond (trillion cut)
vs
 1ct Sapphire (emerald cut)
white
 
white
4.87×4.87 mm 5×5 mm
actual size
Actual size of 0.25ct Diamond (trillion cut, 4.87×4.87mm, White color)   Actual size of 1ct Sapphire (emerald cut, 5×5mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.25ct Diamond (trillion cut, 4.87×4.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1ct Sapphire (emerald cut, 5×5mm) 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
 29% vs 30%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.25ct Diamond Trillion (4.87×4.87mm, White) and 1ct Sapphire Emerald (5×5mm, 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.


0.25 Ct Diamond (Trillion) 1 Ct Sapphire (Emerald)
4.87×4.87 mm vs 5×5 mm
14.7 mm²   23.25 mm²
Face-up size outline for 1ct Sapphire (5×5mm, emerald cut)
Face-up size outline for 0.25ct Diamond (4.87×4.87mm, trillion cut)
0.25ct Diamond Trillion (4.87×4.87mm)
1ct Sapphire Emerald (5×5mm)
Difference: 58% (8.55 mm²)
1ct Sapphire (Emerald, 5×5mm) has approx. 58% more face-up area than 0.25ct Diamond (Trillion, 4.87×4.87mm).


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