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4.52ct Topaz (Princess, 9.27×9.27mm, Blue) vs 1.21ct Diamond (Round, 6.93×6.93mm, White)


Quick summary: When looked from above (face-up position), 4.52ct Topaz (9.27×9.27mm, princess cut) appears 2.3 times larger than 1.21ct Diamond (6.93×6.93mm, round cut). See below how they compare side-by-side on a ring and finger.

4.52ct Topaz (princess cut)
vs
 1.21ct Diamond (round cut)
blue
 
white
9.27×9.27 mm 6.93×6.93 mm
actual size
Actual size of 4.52ct Topaz (princess cut, 9.27×9.27mm, Blue color)   Actual size of 1.21ct Diamond (round cut, 6.93×6.93mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 4.52ct Topaz (princess cut, 9.27×9.27mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1.21ct Diamond (round cut, 6.93×6.93mm) 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
 55% vs 42%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4.52ct Topaz Princess (9.27×9.27mm, Blue) and 1.21ct Diamond Round (6.93×6.93mm, 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, Topaz will face-up slightly smaller than Diamond for a given carat weight, because it has higher specific gravity (3.53 vs. 3.52 - this means it's "slightly 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.


4.52 Ct Topaz (Princess) 1.21 Ct Diamond (Round)
9.27×9.27 mm vs 6.93×6.93 mm
85.93 mm²   37.72 mm²
Face-up size outline for 4.52ct Topaz (9.27×9.27mm, princess cut)
Face-up size outline for 1.21ct Diamond (6.93×6.93mm, round cut)
4.52ct Topaz Princess (9.27×9.27mm)
1.21ct Diamond Round (6.93×6.93mm)
Difference: 128% (48.21 mm²)
4.52ct Topaz (Princess, 9.27×9.27mm) has approx. 128% more face-up area than 1.21ct Diamond (Round, 6.93×6.93mm). In other words, it's 2.28x larger.


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