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0.5ct Tanzanite (Princess, 4.55×4.55mm, Blue) vs 0.5ct Diamond (Princess, 4.37×4.37mm, White)


Quick summary: When looked from above (face-up position), 0.5ct Tanzanite (4.55×4.55mm, princess cut) appears 8% larger than 0.5ct Diamond (4.37×4.37mm, princess cut). See below how they compare side-by-side on a ring and finger.

0.5ct Tanzanite (princess cut)
vs
 0.5ct Diamond (princess cut)
blue
 
white
4.55×4.55 mm 4.37×4.37 mm
actual size
Actual size of 0.5ct Tanzanite (princess cut, 4.55×4.55mm, Blue color)   Actual size of 0.5ct Diamond (princess cut, 4.37×4.37mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 0.5ct Tanzanite (princess cut, 4.55×4.55mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.5ct Diamond (princess cut, 4.37×4.37mm) 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
 27% vs 26%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.5ct Tanzanite Princess (4.55×4.55mm, Blue) and 0.5ct Diamond Princess (4.37×4.37mm, 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, 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.


0.5 Ct Tanzanite (Princess) 0.5 Ct Diamond (Princess)
4.55×4.55 mm vs 4.37×4.37 mm
20.7 mm²   19.1 mm²
Face-up size outline for 0.5ct Tanzanite (4.55×4.55mm, princess cut)
Face-up size outline for 0.5ct Diamond (4.37×4.37mm, princess cut)
0.5ct Tanzanite Princess (4.55×4.55mm)
0.5ct Diamond Princess (4.37×4.37mm)
Difference: 8% (1.6 mm²)
0.5ct Tanzanite (Princess, 4.55×4.55mm) has approx. 8% more face-up area than 0.5ct Diamond (Princess, 4.37×4.37mm).


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