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25ct Topaz (Oval, 23.06×15.37mm, Blue) vs 25ct Diamond (Oval, 23.73×15.82mm, White)


Quick summary: When looked from above (face-up position), 25ct Diamond (23.73×15.82mm, oval cut) appears 6% larger than 25ct Topaz (23.06×15.37mm, oval cut). See below how they compare side-by-side on a ring and finger.

25ct Topaz (oval cut)
vs
 25ct Diamond (oval cut)
blue
 
white
23.06×15.37 mm 23.73×15.82 mm
actual size
Actual size of 25ct Topaz (oval cut, 23.06×15.37mm, Blue color)   Actual size of 25ct Diamond (oval cut, 23.73×15.82mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 25ct Topaz (oval cut, 23.06×15.37mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 25ct Diamond (oval cut, 23.73×15.82mm) 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
 91% vs 94%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 25ct Topaz Oval (23.06×15.37mm, Blue) and 25ct Diamond Oval (23.73×15.82mm, 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.


25 Ct Topaz (Oval) 25 Ct Diamond (Oval)
23.06×15.37 mm vs 23.73×15.82 mm
290.63 mm²   307.84 mm²
Face-up size outline for 25ct Diamond (23.73×15.82mm, oval cut)
Face-up size outline for 25ct Topaz (23.06×15.37mm, oval cut)
25ct Topaz Oval (23.06×15.37mm)
25ct Diamond Oval (23.73×15.82mm)
Difference: 6% (17.21 mm²)
25ct Diamond (Oval, 23.73×15.82mm) has approx. 6% more face-up area than 25ct Topaz (Oval, 23.06×15.37mm).


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