×
carat vs. color  length*  width*
  ×

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

8ct Tanzanite (Oval, 16.28×10.85mm, Blue) vs 8ct Kyanite (Oval, 15.77×10.51mm, Blue)


Quick summary: When looked from above (face-up position), 8ct Tanzanite (16.28×10.85mm, oval cut) appears 7% larger than 8ct Kyanite (15.77×10.51mm, oval cut). See below how they compare side-by-side on a ring and finger.

8ct Tanzanite (oval cut)
vs
 8ct Kyanite (oval cut)
blue
 
blue
16.28×10.85 mm 15.77×10.51 mm
actual size
Actual size of 8ct Tanzanite (oval cut, 16.28×10.85mm, Blue color)   Actual size of 8ct Kyanite (oval cut, 15.77×10.51mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 8ct Tanzanite (oval cut, 16.28×10.85mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 8ct Kyanite (oval cut, 15.77×10.51mm) 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
 65% vs 63%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 8ct Tanzanite Oval (16.28×10.85mm, Blue) and 8ct Kyanite Oval (15.77×10.51mm, 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, Kyanite will face-up smaller than Tanzanite for a given carat weight, because it has higher specific gravity (3.68 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.


8 Ct Tanzanite (Oval) 8 Ct Kyanite (Oval)
16.28×10.85 mm vs 15.77×10.51 mm
144.84 mm²   135.91 mm²
Face-up size outline for 8ct Tanzanite (16.28×10.85mm, oval cut)
Face-up size outline for 8ct Kyanite (15.77×10.51mm, oval cut)
8ct Tanzanite Oval (16.28×10.85mm)
8ct Kyanite Oval (15.77×10.51mm)
Difference: 7% (8.93 mm²)
8ct Tanzanite (Oval, 16.28×10.85mm) has approx. 7% more face-up area than 8ct Kyanite (Oval, 15.77×10.51mm).


Popular comparisons: