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1.45ct Sapphire (Trillion, 7.2×7.2mm, Yellow) vs 0.8ct Diamond (Trillion, 7.18×7.18mm, Yellow)


Quick summary: When looked from above (face-up position), 1.45ct Sapphire (7.2×7.2mm, trillion cut) appears 0.6% larger than 0.8ct Colored Diamond (7.18×7.18mm, trillion cut). See below how they compare side-by-side on a ring and finger.

1.45ct Sapphire (trillion cut)
vs
 0.8ct Diamond (trillion cut)
yellow
 
yellow
7.2×7.2 mm 7.18×7.18 mm
actual size
Actual size of 1.45ct Sapphire (trillion cut, 7.2×7.2mm, Yellow color)   Actual size of 0.8ct Diamond (trillion cut, 7.18×7.18mm, Yellow color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Yellow 1.45ct Sapphire (trillion cut, 7.2×7.2mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Yellow 0.8ct Diamond (trillion cut, 7.18×7.18mm) 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
 43% vs 43%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.45ct Sapphire Trillion (7.2×7.2mm, Yellow) and 0.8ct Diamond Trillion (7.18×7.18mm, Yellow) 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.


1.45 Ct Sapphire (Trillion) 0.8 Ct Colored Diamond (Trillion)
7.2×7.2 mm vs 7.18×7.18 mm
32.14 mm²   31.96 mm²
Face-up size outline for 1.45ct Sapphire (7.2×7.2mm, trillion cut)
Face-up size outline for 0.8ct Diamond (7.18×7.18mm, trillion cut)
1.45ct Sapphire Trillion (7.2×7.2mm)
0.8ct Colored Diamond Trillion (7.18×7.18mm)
Difference: 0.6% (0.18 mm²)
1.45ct Sapphire (Trillion, 7.2×7.2mm) has approx. 0.6% more face-up area than 0.8ct Colored Diamond (Trillion, 7.18×7.18mm).


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