×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

2ct Spinel (Trillion, 9.17×9.17mm, Violet) vs 0.5ct Diamond (Round, 5.16×5.16mm, White)


Quick summary: When looked from above (face-up position), 2ct Spinel (9.17×9.17mm, trillion cut) appears 2.5 times larger than 0.5ct Diamond (5.16×5.16mm, round cut). See below how they compare side-by-side on a ring and finger.

2ct Spinel (trillion cut)
vs
 0.5ct Diamond (round cut)
violet
 
white
9.17×9.17 mm 5.16×5.16 mm
actual size
Actual size of 2ct Spinel (trillion cut, 9.17×9.17mm, Violet color)   Actual size of 0.5ct Diamond (round cut, 5.16×5.16mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 2ct Spinel (trillion cut, 9.17×9.17mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.5ct Diamond (round cut, 5.16×5.16mm) 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
 55% vs 31%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2ct Spinel Trillion (9.17×9.17mm, Violet) and 0.5ct Diamond Round (5.16×5.16mm, 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.


2 Ct Spinel (Trillion) 0.5 Ct Diamond (Round)
9.17×9.17 mm vs 5.16×5.16 mm
52.14 mm²   20.91 mm²
Face-up size outline for 2ct Spinel (9.17×9.17mm, trillion cut)
Face-up size outline for 0.5ct Diamond (5.16×5.16mm, round cut)
2ct Spinel Trillion (9.17×9.17mm)
0.5ct Diamond Round (5.16×5.16mm)
Difference: 149% (31.23 mm²)
2ct Spinel (Trillion, 9.17×9.17mm) has approx. 149% more face-up area than 0.5ct Diamond (Round, 5.16×5.16mm). In other words, it's 2.49x larger.


Popular comparisons: