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5.5ct Benitoite (Radiant, 10.03×10.03mm, Blue) vs 5.5ct Tanzanite (Radiant, 10.32×10.32mm, Blue)


Quick summary: When looked from above (face-up position), 5.5ct Tanzanite (10.32×10.32mm, radiant cut) appears 6% larger than 5.5ct Benitoite (10.03×10.03mm, radiant cut). See below how they compare side-by-side on a ring and finger.

5.5ct Benitoite (radiant cut)
vs
 5.5ct Tanzanite (radiant cut)
blue
 
blue
10.03×10.03 mm 10.32×10.32 mm
actual size
Actual size of 5.5ct Benitoite (radiant cut, 10.03×10.03mm, Blue color)   Actual size of 5.5ct Tanzanite (radiant cut, 10.32×10.32mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 5.5ct Benitoite (radiant cut, 10.03×10.03mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 5.5ct Tanzanite (radiant cut, 10.32×10.32mm) 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
 60% vs 62%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5.5ct Benitoite Radiant (10.03×10.03mm, Blue) and 5.5ct Tanzanite Radiant (10.32×10.32mm, 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.


5.5 Ct Benitoite (Radiant) 5.5 Ct Tanzanite (Radiant)
10.03×10.03 mm vs 10.32×10.32 mm
95.57 mm²   101.18 mm²
Face-up size outline for 5.5ct Tanzanite (10.32×10.32mm, radiant cut)
Face-up size outline for 5.5ct Benitoite (10.03×10.03mm, radiant cut)
5.5ct Benitoite Radiant (10.03×10.03mm)
5.5ct Tanzanite Radiant (10.32×10.32mm)
Difference: 6% (5.61 mm²)
5.5ct Tanzanite (Radiant, 10.32×10.32mm) has approx. 6% more face-up area than 5.5ct Benitoite (Radiant, 10.03×10.03mm).


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