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0.45ct Diamond (Round, 5.11×5.03mm, White) vs 4.35ct Topaz (Cushion, 9.52×9.52mm, Dark Bluish Green)


Quick summary: When looked from above (face-up position), 4.35ct Topaz (9.52×9.52mm, cushion cut) appears 4 times larger than 0.45ct Diamond (5.11×5.03mm, round cut). See below how they compare side-by-side on a ring and finger.

0.45ct Diamond (round cut)
vs
 4.35ct Topaz (cushion cut)
white
 
dark bluish green
5.11×5.03 mm 9.52×9.52 mm
actual size
Actual size of 0.45ct Diamond (round cut, 5.11×5.03mm, White color)   Actual size of 4.35ct Topaz (cushion cut, 9.52×9.52mm, Dark Bluish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.45ct Diamond (round cut, 5.11×5.03mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Dark Bluish Green 4.35ct Topaz (cushion cut, 9.52×9.52mm) 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
 30% vs 57%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.45ct Diamond Round (5.11×5.03mm, White) and 4.35ct Topaz Cushion (9.52×9.52mm, Dark Bluish Green) 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.


0.45 Ct Diamond (Round) 4.35 Ct Topaz (Cushion)
5.11×5.03 mm vs 9.52×9.52 mm
20.19 mm²   81.57 mm²
Face-up size outline for 4.35ct Topaz (9.52×9.52mm, cushion cut)
Face-up size outline for 0.45ct Diamond (5.11×5.03mm, round cut)
0.45ct Diamond Round (5.11×5.03mm)
4.35ct Topaz Cushion (9.52×9.52mm)
Difference: 304% (61.38 mm²)
4.35ct Topaz (Cushion, 9.52×9.52mm) has approx. 304% more face-up area than 0.45ct Diamond (Round, 5.11×5.03mm). In other words, it's 4.04x larger.


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