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2.05ct Topaz (Round, 7.92×7.92mm, Blue) vs 3.51ct Sapphire (Oval, 11.49×7.66mm, Blue)


Quick summary: When looked from above (face-up position), 3.51ct Sapphire (11.49×7.66mm, oval cut) appears 46% larger than 2.05ct Topaz (7.92×7.92mm, round cut). See below how they compare side-by-side on a ring and finger.

2.05ct Topaz (round cut)
vs
 3.51ct Sapphire (oval cut)
blue
 
blue
7.92×7.92 mm 11.49×7.66 mm
actual size
Actual size of 2.05ct Topaz (round cut, 7.92×7.92mm, Blue color)   Actual size of 3.51ct Sapphire (oval cut, 11.49×7.66mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 2.05ct Topaz (round cut, 7.92×7.92mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 3.51ct Sapphire (oval cut, 11.49×7.66mm) 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
 47% vs 46%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2.05ct Topaz Round (7.92×7.92mm, Blue) and 3.51ct Sapphire Oval (11.49×7.66mm, 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.


2.05 Ct Topaz (Round) 3.51 Ct Sapphire (Oval)
7.92×7.92 mm vs 11.49×7.66 mm
49.27 mm²   72.17 mm²
Face-up size outline for 3.51ct Sapphire (11.49×7.66mm, oval cut)
Face-up size outline for 2.05ct Topaz (7.92×7.92mm, round cut)
2.05ct Topaz Round (7.92×7.92mm)
3.51ct Sapphire Oval (11.49×7.66mm)
Difference: 46% (22.9 mm²)
3.51ct Sapphire (Oval, 11.49×7.66mm) has approx. 46% more face-up area than 2.05ct Topaz (Round, 7.92×7.92mm).


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