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7ct Sapphire (Princess, 10.05×10.05mm, Blue) vs 7ct Topaz (Princess, 10.48×10.48mm, Blue)


Quick summary: When looked from above (face-up position), 7ct Topaz (10.48×10.48mm, princess cut) appears 9% larger than 7ct Sapphire (10.05×10.05mm, princess cut). See below how they compare side-by-side on a ring and finger.

7ct Sapphire (princess cut)
vs
 7ct Topaz (princess cut)
blue
 
blue
10.05×10.05 mm 10.48×10.48 mm
actual size
Actual size of 7ct Sapphire (princess cut, 10.05×10.05mm, Blue color)   Actual size of 7ct Topaz (princess cut, 10.48×10.48mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 7ct Sapphire (princess cut, 10.05×10.05mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 7ct Topaz (princess cut, 10.48×10.48mm) 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
 60% vs 63%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7ct Sapphire Princess (10.05×10.05mm, Blue) and 7ct Topaz Princess (10.48×10.48mm, 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 Topaz for a given carat weight, because it has higher specific gravity (4 vs. 3.53 - this means it's "heavier" compared to Topaz 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.


7 Ct Sapphire (Princess) 7 Ct Topaz (Princess)
10.05×10.05 mm vs 10.48×10.48 mm
101 mm²   109.83 mm²
Face-up size outline for 7ct Topaz (10.48×10.48mm, princess cut)
Face-up size outline for 7ct Sapphire (10.05×10.05mm, princess cut)
7ct Sapphire Princess (10.05×10.05mm)
7ct Topaz Princess (10.48×10.48mm)
Difference: 9% (8.83 mm²)
7ct Topaz (Princess, 10.48×10.48mm) has approx. 9% more face-up area than 7ct Sapphire (Princess, 10.05×10.05mm).


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