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2.2ct Diamond (Round, 8.45×8.45mm, White) vs 0.3ct Sapphire (Trillion, 4.71×4.71mm, Blue)


Quick summary: When looked from above (face-up position), 2.2ct Diamond (8.45×8.45mm, round cut) appears 4.1 times larger than 0.3ct Sapphire (4.71×4.71mm, trillion cut). See below how they compare side-by-side on a ring and finger.

2.2ct Diamond (round cut)
vs
 0.3ct Sapphire (trillion cut)
white
 
blue
8.45×8.45 mm 4.71×4.71 mm
actual size
Actual size of 2.2ct Diamond (round cut, 8.45×8.45mm, White color)   Actual size of 0.3ct Sapphire (trillion cut, 4.71×4.71mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 2.2ct Diamond (round cut, 8.45×8.45mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.3ct Sapphire (trillion cut, 4.71×4.71mm) 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
 50% vs 28%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 2.2ct Diamond Round (8.45×8.45mm, White) and 0.3ct Sapphire Trillion (4.71×4.71mm, Blue) 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.


2.2 Ct Diamond (Round) 0.3 Ct Sapphire (Trillion)
8.45×8.45 mm vs 4.71×4.71 mm
56.08 mm²   13.75 mm²
Face-up size outline for 2.2ct Diamond (8.45×8.45mm, round cut)
Face-up size outline for 0.3ct Sapphire (4.71×4.71mm, trillion cut)
2.2ct Diamond Round (8.45×8.45mm)
0.3ct Sapphire Trillion (4.71×4.71mm)
Difference: 308% (42.33 mm²)
2.2ct Diamond (Round, 8.45×8.45mm) has approx. 308% more face-up area than 0.3ct Sapphire (Trillion, 4.71×4.71mm). In other words, it's 4.08x larger.


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