×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

9ct Benitoite (Radiant, 11.82×11.82mm, Blue) vs 9ct Tanzanite (Radiant, 12.16×12.16mm, Blue)


Quick summary: When looked from above (face-up position), 9ct Tanzanite (12.16×12.16mm, radiant cut) appears 6% larger than 9ct Benitoite (11.82×11.82mm, radiant cut). See below how they compare side-by-side on a ring and finger.

9ct Benitoite (radiant cut)
vs
 9ct Tanzanite (radiant cut)
blue
 
blue
11.82×11.82 mm 12.16×12.16 mm
actual size
Actual size of 9ct Benitoite (radiant cut, 11.82×11.82mm, Blue color)   Actual size of 9ct Tanzanite (radiant cut, 12.16×12.16mm, 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 (radiant cut, 11.82×11.82mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 9ct Tanzanite (radiant cut, 12.16×12.16mm) 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
 70% vs 72%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 9ct Benitoite Radiant (11.82×11.82mm, Blue) and 9ct Tanzanite Radiant (12.16×12.16mm, 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 (Radiant) 9 Ct Tanzanite (Radiant)
11.82×11.82 mm vs 12.16×12.16 mm
132.73 mm²   140.47 mm²
Face-up size outline for 9ct Tanzanite (12.16×12.16mm, radiant cut)
Face-up size outline for 9ct Benitoite (11.82×11.82mm, radiant cut)
9ct Benitoite Radiant (11.82×11.82mm)
9ct Tanzanite Radiant (12.16×12.16mm)
Difference: 6% (7.74 mm²)
9ct Tanzanite (Radiant, 12.16×12.16mm) has approx. 6% more face-up area than 9ct Benitoite (Radiant, 11.82×11.82mm).


Popular comparisons: