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1ct Diamond (Princess, 6×6mm, White) vs 1ct Sapphire (Princess, 5.85×6mm, White)


Quick summary: When looked from above (face-up position), 1ct Diamond (6×6mm, princess cut) appears 3% larger than 1ct Sapphire (5.85×6mm, princess cut). See below how they compare side-by-side on a ring and finger.

1ct Diamond (princess cut)
vs
 1ct Sapphire (princess cut)
white
 
white
6×6 mm 5.85×6 mm
actual size
Actual size of 1ct Diamond (princess cut, 6×6mm, White color)   Actual size of 1ct Sapphire (princess cut, 5.85×6mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1ct Diamond (princess cut, 6×6mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1ct Sapphire (princess cut, 5.85×6mm) 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
 36% vs 36%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Diamond Princess (6×6mm, White) and 1ct Sapphire Princess (5.85×6mm, 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.


1 Ct Diamond (Princess) 1 Ct Sapphire (Princess)
6×6 mm vs 5.85×6 mm
36 mm²   35.1 mm²
Face-up size outline for 1ct Diamond (6×6mm, princess cut)
Face-up size outline for 1ct Sapphire (5.85×6mm, princess cut)
1ct Diamond Princess (6×6mm)
1ct Sapphire Princess (5.85×6mm)
Difference: 3% (0.9 mm²)
1ct Diamond (Princess, 6×6mm) has approx. 3% more face-up area than 1ct Sapphire (Princess, 5.85×6mm).


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