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3.1ct Sapphire (Emerald, 9.32×6.9mm, Blue) vs 0.92ct Diamond (Cabochon, 6.95×4.63mm, White)


Quick summary: When looked from above (face-up position), 3.1ct Sapphire (9.32×6.9mm, emerald cut) appears 2.3 times larger than 0.92ct Diamond (6.95×4.63mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

3.1ct Sapphire (emerald cut)
vs
 0.92ct Diamond (cabochon cut)
blue
 
white
9.32×6.9 mm 6.95×4.63 mm
actual size
Actual size of 3.1ct Sapphire (emerald cut, 9.32×6.9mm, Blue color)   Actual size of 0.92ct Diamond (cabochon cut, 6.95×4.63mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3.1ct Sapphire (emerald cut, 9.32×6.9mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.92ct Diamond (cabochon cut, 6.95×4.63mm) 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
 41% vs 28%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 3.1ct Sapphire Emerald (9.32×6.9mm, Blue) and 0.92ct Diamond Cabochon (6.95×4.63mm, 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, Sapphire will face-up smaller than Diamond for a given carat weight, because it has higher specific gravity (4 vs. 3.52 - this means it's "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.


3.1 Ct Sapphire (Emerald) 0.92 Ct Diamond (Cabochon)
9.32×6.9 mm vs 6.95×4.63 mm
59.81 mm²   26.39 mm²
Face-up size outline for 3.1ct Sapphire (9.32×6.9mm, emerald cut)
Face-up size outline for 0.92ct Diamond (6.95×4.63mm, cabochon cut)
3.1ct Sapphire Emerald (9.32×6.9mm)
0.92ct Diamond Cabochon (6.95×4.63mm)
Difference: 127% (33.42 mm²)
3.1ct Sapphire (Emerald, 9.32×6.9mm) has approx. 127% more face-up area than 0.92ct Diamond (Cabochon, 6.95×4.63mm). In other words, it's 2.27x larger.


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