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0.4ct Sapphire (Princess, 3.96×3.96mm, Blue) vs 2ct Diamond (Princess, 6.94×6.94mm, White)


Quick summary: When looked from above (face-up position), 2ct Diamond (6.94×6.94mm, princess cut) appears 3.1 times larger than 0.4ct Sapphire (3.96×3.96mm, princess cut). See below how they compare side-by-side on a ring and finger.

0.4ct Sapphire (princess cut)
vs
 2ct Diamond (princess cut)
blue
 
white
3.96×3.96 mm 6.94×6.94 mm
actual size
Actual size of 0.4ct Sapphire (princess cut, 3.96×3.96mm, Blue color)   Actual size of 2ct Diamond (princess cut, 6.94×6.94mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 0.4ct Sapphire (princess cut, 3.96×3.96mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 2ct Diamond (princess cut, 6.94×6.94mm) 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
 24% vs 42%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.4ct Sapphire Princess (3.96×3.96mm, Blue) and 2ct Diamond Princess (6.94×6.94mm, 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.


0.4 Ct Sapphire (Princess) 2 Ct Diamond (Princess)
3.96×3.96 mm vs 6.94×6.94 mm
15.68 mm²   48.16 mm²
Face-up size outline for 2ct Diamond (6.94×6.94mm, princess cut)
Face-up size outline for 0.4ct Sapphire (3.96×3.96mm, princess cut)
0.4ct Sapphire Princess (3.96×3.96mm)
2ct Diamond Princess (6.94×6.94mm)
Difference: 207% (32.48 mm²)
2ct Diamond (Princess, 6.94×6.94mm) has approx. 207% more face-up area than 0.4ct Sapphire (Princess, 3.96×3.96mm). In other words, it's 3.07x larger.


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