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1.8ct Spinel (Pear, 9.5×7.3mm, Green) vs 1ct Sapphire (Trillion, 7.03×7.03mm, Blue)


Quick summary: When looked from above (face-up position), 1.8ct Spinel (9.5×7.3mm, pear cut) appears 65% larger than 1ct Sapphire (7.03×7.03mm, trillion cut). See below how they compare side-by-side on a ring and finger.

1.8ct Spinel (pear cut)
vs
 1ct Sapphire (trillion cut)
green
 
blue
9.5×7.3 mm 7.03×7.03 mm
actual size
Actual size of 1.8ct Spinel (pear cut, 9.5×7.3mm, Green color)   Actual size of 1ct Sapphire (trillion cut, 7.03×7.03mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 1.8ct Spinel (pear cut, 9.5×7.3mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1ct Sapphire (trillion cut, 7.03×7.03mm) 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
 44% vs 42%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.8ct Spinel Pear (9.5×7.3mm, Green) and 1ct Sapphire Trillion (7.03×7.03mm, 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 Spinel for a given carat weight, because it has higher specific gravity (4 vs. 3.6 - this means it's "heavier" compared to Spinel 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.


1.8 Ct Spinel (Pear) 1 Ct Sapphire (Trillion)
9.5×7.3 mm vs 7.03×7.03 mm
50.63 mm²   30.64 mm²
Face-up size outline for 1.8ct Spinel (9.5×7.3mm, pear cut)
Face-up size outline for 1ct Sapphire (7.03×7.03mm, trillion cut)
1.8ct Spinel Pear (9.5×7.3mm)
1ct Sapphire Trillion (7.03×7.03mm)
Difference: 65% (19.99 mm²)
1.8ct Spinel (Pear, 9.5×7.3mm) has approx. 65% more face-up area than 1ct Sapphire (Trillion, 7.03×7.03mm).


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