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7.5ct Benitoite (Princess, 10.6×10.6mm, Blue) vs 7.5ct Tanzanite (Princess, 10.91×10.91mm, Blue)


Quick summary: When looked from above (face-up position), 7.5ct Tanzanite (10.91×10.91mm, princess cut) appears 6% larger than 7.5ct Benitoite (10.6×10.6mm, princess cut). See below how they compare side-by-side on a ring and finger.

7.5ct Benitoite (princess cut)
vs
7.5ct Tanzanite (princess cut)
blue
 
blue
10.6×10.6 mm 10.91×10.91 mm
actual size
Actual size of 7.5ct Benitoite (princess cut, 10.6×10.6mm, Blue color)   Actual size of 7.5ct Tanzanite (princess cut, 10.91×10.91mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 7.5ct Benitoite (princess cut, 10.6×10.6mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 7.5ct Tanzanite (princess cut, 10.91×10.91mm) 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
63% vs 65%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7.5ct Benitoite Princess (10.6×10.6mm, Blue) and 7.5ct Tanzanite Princess (10.91×10.91mm, 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, Benitoite will face-up smaller than Tanzanite for a given carat weight, because it has higher specific gravity (3.65 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.


7.5 Ct Benitoite (Princess) 7.5 Ct Tanzanite (Princess)
10.6×10.6 mm vs 10.91×10.91 mm
112.36 mm²   119.03 mm²
Face-up size outline for 7.5ct Tanzanite (10.91×10.91mm, princess cut)
Face-up size outline for 7.5ct Benitoite (10.6×10.6mm, princess cut)
7.5ct Benitoite Princess (10.6×10.6mm)
7.5ct Tanzanite Princess (10.91×10.91mm)
Difference: 6% (6.67 mm²)
7.5ct Tanzanite (Princess, 10.91×10.91mm) has approx. 6% more face-up area than 7.5ct Benitoite (Princess, 10.6×10.6mm).


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