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1.8ct Diamond (Oval, 9.87×6.58mm, White) vs 0.96ct Spinel (Round, 6.11×6.11mm, Red)


Quick summary: When looked from above (face-up position), 1.8ct Diamond (9.87×6.58mm, oval cut) appears 82% larger than 0.96ct Spinel (6.11×6.11mm, round cut). See below how they compare side-by-side on a ring and finger.

1.8ct Diamond (oval cut)
vs
 0.96ct Spinel (round cut)
white
 
red
9.87×6.58 mm 6.11×6.11 mm
actual size
Actual size of 1.8ct Diamond (oval cut, 9.87×6.58mm, White color)   Actual size of 0.96ct Spinel (round cut, 6.11×6.11mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1.8ct Diamond (oval cut, 9.87×6.58mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 0.96ct Spinel (round cut, 6.11×6.11mm) 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
 39% vs 37%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.8ct Diamond Oval (9.87×6.58mm, White) and 0.96ct Spinel Round (6.11×6.11mm, Red) 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, Spinel will face-up slightly smaller than Diamond for a given carat weight, because it has higher specific gravity (3.6 vs. 3.52 - this means it's "slightly 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.


1.8 Ct Diamond (Oval) 0.96 Ct Spinel (Round)
9.87×6.58 mm vs 6.11×6.11 mm
53.25 mm²   29.32 mm²
Face-up size outline for 1.8ct Diamond (9.87×6.58mm, oval cut)
Face-up size outline for 0.96ct Spinel (6.11×6.11mm, round cut)
1.8ct Diamond Oval (9.87×6.58mm)
0.96ct Spinel Round (6.11×6.11mm)
Difference: 82% (23.93 mm²)
1.8ct Diamond (Oval, 9.87×6.58mm) has approx. 82% more face-up area than 0.96ct Spinel (Round, 6.11×6.11mm).


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