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0.45ct Diamond (Oval, 6.23×4.15mm, White) vs 0.2ct Sapphire (Round, 3.5×3.5mm, Blue)


Quick summary: When looked from above (face-up position), 0.45ct Diamond (6.23×4.15mm, oval cut) appears 2.2 times larger than 0.2ct Sapphire (3.5×3.5mm, round cut). See below how they compare side-by-side on a ring and finger.

0.45ct Diamond (oval cut)
vs
 0.2ct Sapphire (round cut)
white
 
blue
6.23×4.15 mm 3.5×3.5 mm
actual size
Actual size of 0.45ct Diamond (oval cut, 6.23×4.15mm, White color)   Actual size of 0.2ct Sapphire (round cut, 3.5×3.5mm, Blue 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 (oval cut, 6.23×4.15mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.2ct Sapphire (round cut, 3.5×3.5mm) 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
 25% vs 21%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.45ct Diamond Oval (6.23×4.15mm, White) and 0.2ct Sapphire Round (3.5×3.5mm, 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.


0.45 Ct Diamond (Oval) 0.2 Ct Sapphire (Round)
6.23×4.15 mm vs 3.5×3.5 mm
21.2 mm²   9.62 mm²
Face-up size outline for 0.45ct Diamond (6.23×4.15mm, oval cut)
Face-up size outline for 0.2ct Sapphire (3.5×3.5mm, round cut)
0.45ct Diamond Oval (6.23×4.15mm)
0.2ct Sapphire Round (3.5×3.5mm)
Difference: 120% (11.58 mm²)
0.45ct Diamond (Oval, 6.23×4.15mm) has approx. 120% more face-up area than 0.2ct Sapphire (Round, 3.5×3.5mm). In other words, it's 2.2x larger.


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