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1.5ct Spinel (Marquise, 11.7×5.85mm, Red) vs 1.5ct Diamond (Marquise, 11.9×5.95mm, White)


Quick summary: When looked from above (face-up position), 1.5ct Diamond (11.9×5.95mm, marquise cut) appears 3% larger than 1.5ct Spinel (11.7×5.85mm, marquise cut). See below how they compare side-by-side on a ring and finger.

1.5ct Spinel (marquise cut)
vs
 1.5ct Diamond (marquise cut)
red
 
white
11.7×5.85 mm 11.9×5.95 mm
actual size
Actual size of 1.5ct Spinel (marquise cut, 11.7×5.85mm, Red color)   Actual size of 1.5ct Diamond (marquise cut, 11.9×5.95mm, 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 (marquise cut, 11.7×5.85mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1.5ct Diamond (marquise cut, 11.9×5.95mm) 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
 35% vs 36%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.5ct Spinel Marquise (11.7×5.85mm, Red) and 1.5ct Diamond Marquise (11.9×5.95mm, 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 (Marquise) 1.5 Ct Diamond (Marquise)
11.7×5.85 mm vs 11.9×5.95 mm
48.6 mm²   50.27 mm²
Face-up size outline for 1.5ct Diamond (11.9×5.95mm, marquise cut)
Face-up size outline for 1.5ct Spinel (11.7×5.85mm, marquise cut)
1.5ct Spinel Marquise (11.7×5.85mm)
1.5ct Diamond Marquise (11.9×5.95mm)
Difference: 3% (1.67 mm²)
1.5ct Diamond (Marquise, 11.9×5.95mm) has approx. 3% more face-up area than 1.5ct Spinel (Marquise, 11.7×5.85mm).


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