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10ct Topaz (Emerald, 14.34×10.62mm, Blue) vs 10ct Diamond (Cabochon, 15.39×10.26mm, White)


Quick summary: When looked from above (face-up position), 10ct Topaz (14.34×10.62mm, emerald cut) appears 9% larger than 10ct Diamond (15.39×10.26mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

10ct Topaz (emerald cut)
vs
 10ct Diamond (cabochon cut)
blue
 
white
14.34×10.62 mm 15.39×10.26 mm
actual size
Actual size of 10ct Topaz (emerald cut, 14.34×10.62mm, Blue color)   Actual size of 10ct Diamond (cabochon cut, 15.39×10.26mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 10ct Topaz (emerald cut, 14.34×10.62mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 10ct Diamond (cabochon cut, 15.39×10.26mm) 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
 63% vs 61%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 10ct Topaz Emerald (14.34×10.62mm, Blue) and 10ct Diamond Cabochon (15.39×10.26mm, 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.


10 Ct Topaz (Emerald) 10 Ct Diamond (Cabochon)
14.34×10.62 mm vs 15.39×10.26 mm
141.63 mm²   129.48 mm²
Face-up size outline for 10ct Topaz (14.34×10.62mm, emerald cut)
Face-up size outline for 10ct Diamond (15.39×10.26mm, cabochon cut)
10ct Topaz Emerald (14.34×10.62mm)
10ct Diamond Cabochon (15.39×10.26mm)
Difference: 9% (12.15 mm²)
10ct Topaz (Emerald, 14.34×10.62mm) has approx. 9% more face-up area than 10ct Diamond (Cabochon, 15.39×10.26mm).


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