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1.5ct Spinel (Emerald, 7.57×5.61mm, Red) vs 1ct Diamond (Emerald, 6.68×4.95mm, White)


Quick summary: When looked from above (face-up position), 1.5ct Spinel (7.57×5.61mm, emerald cut) appears 28% larger than 1ct Diamond (6.68×4.95mm, emerald cut). See below how they compare side-by-side on a ring and finger.

1.5ct Spinel (emerald cut)
vs
 1ct Diamond (emerald cut)
red
 
white
7.57×5.61 mm 6.68×4.95 mm
actual size
Actual size of 1.5ct Spinel (emerald cut, 7.57×5.61mm, Red color)   Actual size of 1ct Diamond (emerald cut, 6.68×4.95mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 1.5ct Spinel (emerald cut, 7.57×5.61mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1ct Diamond (emerald cut, 6.68×4.95mm) 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
 34% vs 30%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.5ct Spinel Emerald (7.57×5.61mm, Red) and 1ct Diamond Emerald (6.68×4.95mm, White) 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.


1.5 Ct Spinel (Emerald) 1 Ct Diamond (Emerald)
7.57×5.61 mm vs 6.68×4.95 mm
39.49 mm²   30.75 mm²
Face-up size outline for 1.5ct Spinel (7.57×5.61mm, emerald cut)
Face-up size outline for 1ct Diamond (6.68×4.95mm, emerald cut)
1.5ct Spinel Emerald (7.57×5.61mm)
1ct Diamond Emerald (6.68×4.95mm)
Difference: 28% (8.74 mm²)
1.5ct Spinel (Emerald, 7.57×5.61mm) has approx. 28% more face-up area than 1ct Diamond (Emerald, 6.68×4.95mm).


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