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0.38ct Spinel (Round, 4.49×4.49mm, Red) vs 2ct Ruby (Emerald, 8.05×5.96mm, Red)


Quick summary: When looked from above (face-up position), 2ct Ruby (8.05×5.96mm, emerald cut) appears 2.8 times larger than 0.38ct Spinel (4.49×4.49mm, round cut). See below how they compare side-by-side on a ring and finger.

0.38ct Spinel (round cut)
vs
 2ct Ruby (emerald cut)
red
 
red
4.49×4.49 mm 8.05×5.96 mm
actual size
Actual size of 0.38ct Spinel (round cut, 4.49×4.49mm, Red color)   Actual size of 2ct Ruby (emerald cut, 8.05×5.96mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 0.38ct Spinel (round cut, 4.49×4.49mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 2ct Ruby (emerald cut, 8.05×5.96mm) 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
 27% vs 36%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.38ct Spinel Round (4.49×4.49mm, Red) and 2ct Ruby Emerald (8.05×5.96mm, 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, Ruby 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.


0.38 Ct Spinel (Round) 2 Ct Ruby (Emerald)
4.49×4.49 mm vs 8.05×5.96 mm
15.83 mm²   44.62 mm²
Face-up size outline for 2ct Ruby (8.05×5.96mm, emerald cut)
Face-up size outline for 0.38ct Spinel (4.49×4.49mm, round cut)
0.38ct Spinel Round (4.49×4.49mm)
2ct Ruby Emerald (8.05×5.96mm)
Difference: 182% (28.79 mm²)
2ct Ruby (Emerald, 8.05×5.96mm) has approx. 182% more face-up area than 0.38ct Spinel (Round, 4.49×4.49mm). In other words, it's 2.82x larger.


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