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9ct Benitoite (Cushion, 11.87×11.87mm, Blue) vs 9ct Tanzanite (Cushion, 12.22×12.22mm, Blue)


Quick summary: When looked from above (face-up position), 9ct Tanzanite (12.22×12.22mm, cushion cut) appears 6% larger than 9ct Benitoite (11.87×11.87mm, cushion cut). See below how they compare side-by-side on a ring and finger.

9ct Benitoite (cushion cut)
vs
 9ct Tanzanite (cushion cut)
blue
 
blue
11.87×11.87 mm 12.22×12.22 mm
actual size
Actual size of 9ct Benitoite (cushion cut, 11.87×11.87mm, Blue color)   Actual size of 9ct Tanzanite (cushion cut, 12.22×12.22mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 9ct Benitoite (cushion cut, 11.87×11.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 9ct Tanzanite (cushion cut, 12.22×12.22mm) 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
 71% vs 73%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 9ct Benitoite Cushion (11.87×11.87mm, Blue) and 9ct Tanzanite Cushion (12.22×12.22mm, 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.


9 Ct Benitoite (Cushion) 9 Ct Tanzanite (Cushion)
11.87×11.87 mm vs 12.22×12.22 mm
126.81 mm²   134.4 mm²
Face-up size outline for 9ct Tanzanite (12.22×12.22mm, cushion cut)
Face-up size outline for 9ct Benitoite (11.87×11.87mm, cushion cut)
9ct Benitoite Cushion (11.87×11.87mm)
9ct Tanzanite Cushion (12.22×12.22mm)
Difference: 6% (7.59 mm²)
9ct Tanzanite (Cushion, 12.22×12.22mm) has approx. 6% more face-up area than 9ct Benitoite (Cushion, 11.87×11.87mm).


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