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0.75ct Diamond (Trillion, 7.03×7.03mm, White) vs 1.2ct Sapphire (Oval, 8.04×5.36mm, Light Purple)


Quick summary: When looked from above (face-up position), 1.2ct Sapphire (8.04×5.36mm, oval cut) appears 15% larger than 0.75ct Diamond (7.03×7.03mm, trillion cut). See below how they compare side-by-side on a ring and finger.

0.75ct Diamond (trillion cut)
vs
 1.2ct Sapphire (oval cut)
white
 
light purple
7.03×7.03 mm 8.04×5.36 mm
actual size
Actual size of 0.75ct Diamond (trillion cut, 7.03×7.03mm, White color)   Actual size of 1.2ct Sapphire (oval cut, 8.04×5.36mm, Light Purple color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.75ct Diamond (trillion cut, 7.03×7.03mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Purple 1.2ct Sapphire (oval cut, 8.04×5.36mm) 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
 42% vs 32%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.75ct Diamond Trillion (7.03×7.03mm, White) and 1.2ct Sapphire Oval (8.04×5.36mm, Light Purple) 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.


0.75 Ct Diamond (Trillion) 1.2 Ct Sapphire (Oval)
7.03×7.03 mm vs 8.04×5.36 mm
30.64 mm²   35.34 mm²
Face-up size outline for 1.2ct Sapphire (8.04×5.36mm, oval cut)
Face-up size outline for 0.75ct Diamond (7.03×7.03mm, trillion cut)
0.75ct Diamond Trillion (7.03×7.03mm)
1.2ct Sapphire Oval (8.04×5.36mm)
Difference: 15% (4.7 mm²)
1.2ct Sapphire (Oval, 8.04×5.36mm) has approx. 15% more face-up area than 0.75ct Diamond (Trillion, 7.03×7.03mm).


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