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6.7ct Spinel (Trillion, 13.72×13.72mm, Red) vs 6.7ct Diamond (Cabochon, 13.47×8.98mm, White)


Quick summary: When looked from above (face-up position), 6.7ct Spinel (13.72×13.72mm, trillion cut) appears 18% larger than 6.7ct Diamond (13.47×8.98mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

6.7ct Spinel (trillion cut)
vs
 6.7ct Diamond (cabochon cut)
red
 
white
13.72×13.72 mm 13.47×8.98 mm
actual size
Actual size of 6.7ct Spinel (trillion cut, 13.72×13.72mm, Red color)   Actual size of 6.7ct Diamond (cabochon cut, 13.47×8.98mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 6.7ct Spinel (trillion cut, 13.72×13.72mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 6.7ct Diamond (cabochon cut, 13.47×8.98mm) 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
 82% vs 54%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 6.7ct Spinel Trillion (13.72×13.72mm, Red) and 6.7ct Diamond Cabochon (13.47×8.98mm, 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.


6.7 Ct Spinel (Trillion) 6.7 Ct Diamond (Cabochon)
13.72×13.72 mm vs 13.47×8.98 mm
116.71 mm²   99.19 mm²
Face-up size outline for 6.7ct Spinel (13.72×13.72mm, trillion cut)
Face-up size outline for 6.7ct Diamond (13.47×8.98mm, cabochon cut)
6.7ct Spinel Trillion (13.72×13.72mm)
6.7ct Diamond Cabochon (13.47×8.98mm)
Difference: 18% (17.52 mm²)
6.7ct Spinel (Trillion, 13.72×13.72mm) has approx. 18% more face-up area than 6.7ct Diamond (Cabochon, 13.47×8.98mm).


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