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2.54ct Diamond (Round, 8.87×8.87mm, White) vs 2.54ct Tanzanite (Cushion, 8.13×8.13mm, Blue)


Quick summary: When looked from above (face-up position), 2.54ct Diamond (8.87×8.87mm, round cut) appears 4% larger than 2.54ct Tanzanite (8.13×8.13mm, cushion cut). See below how they compare side-by-side on a ring and finger.

2.54ct Diamond (round cut)
vs
 2.54ct Tanzanite (cushion cut)
white
 
blue
8.87×8.87 mm 8.13×8.13 mm
actual size
Actual size of 2.54ct Diamond (round cut, 8.87×8.87mm, White color)   Actual size of 2.54ct Tanzanite (cushion cut, 8.13×8.13mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 2.54ct Diamond (round cut, 8.87×8.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 2.54ct Tanzanite (cushion cut, 8.13×8.13mm) 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
 53% vs 49%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2.54ct Diamond Round (8.87×8.87mm, White) and 2.54ct Tanzanite Cushion (8.13×8.13mm, Blue) 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, Diamond will face-up smaller than Tanzanite for a given carat weight, because it has higher specific gravity (3.52 vs. 3.35 - this means it's "heavier" compared to Tanzanite 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.


2.54 Ct Diamond (Round) 2.54 Ct Tanzanite (Cushion)
8.87×8.87 mm vs 8.13×8.13 mm
61.79 mm²   59.49 mm²
Face-up size outline for 2.54ct Diamond (8.87×8.87mm, round cut)
Face-up size outline for 2.54ct Tanzanite (8.13×8.13mm, cushion cut)
2.54ct Diamond Round (8.87×8.87mm)
2.54ct Tanzanite Cushion (8.13×8.13mm)
Difference: 4% (2.3 mm²)
2.54ct Diamond (Round, 8.87×8.87mm) has approx. 4% more face-up area than 2.54ct Tanzanite (Cushion, 8.13×8.13mm).


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