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6.5ct Tanzanite (Heart, 12.39×12.39mm, Blue) vs 6.5ct Kyanite (Heart, 12.01×12.01mm, Blue)


Quick summary: When looked from above (face-up position), 6.5ct Tanzanite (12.39×12.39mm, heart cut) appears 6% larger than 6.5ct Kyanite (12.01×12.01mm, heart cut). See below how they compare side-by-side on a ring and finger.

6.5ct Tanzanite (heart cut)
vs
 6.5ct Kyanite (heart cut)
blue
 
blue
12.39×12.39 mm 12.01×12.01 mm
actual size
Actual size of 6.5ct Tanzanite (heart cut, 12.39×12.39mm, Blue color)   Actual size of 6.5ct Kyanite (heart cut, 12.01×12.01mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 6.5ct Tanzanite (heart cut, 12.39×12.39mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 6.5ct Kyanite (heart cut, 12.01×12.01mm) 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
 74% vs 72%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 6.5ct Tanzanite Heart (12.39×12.39mm, Blue) and 6.5ct Kyanite Heart (12.01×12.01mm, 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.


6.5 Ct Tanzanite (Heart) 6.5 Ct Kyanite (Heart)
12.39×12.39 mm vs 12.01×12.01 mm
110.53 mm²   103.85 mm²
Face-up size outline for 6.5ct Tanzanite (12.39×12.39mm, heart cut)
Face-up size outline for 6.5ct Kyanite (12.01×12.01mm, heart cut)
6.5ct Tanzanite Heart (12.39×12.39mm)
6.5ct Kyanite Heart (12.01×12.01mm)
Difference: 6% (6.68 mm²)
6.5ct Tanzanite (Heart, 12.39×12.39mm) has approx. 6% more face-up area than 6.5ct Kyanite (Heart, 12.01×12.01mm).


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