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3ct Benitoite (Pear, 12.65×7.62mm, Blue) vs 3ct Tanzanite (Pear, 13.01×7.84mm, Blue)


Quick summary: When looked from above (face-up position), 3ct Tanzanite (13.01×7.84mm, pear cut) appears 6% larger than 3ct Benitoite (12.65×7.62mm, pear cut). See below how they compare side-by-side on a ring and finger.

3ct Benitoite (pear cut)
vs
 3ct Tanzanite (pear cut)
blue
 
blue
12.65×7.62 mm 13.01×7.84 mm
actual size
Actual size of 3ct Benitoite (pear cut, 12.65×7.62mm, Blue color)   Actual size of 3ct Tanzanite (pear cut, 13.01×7.84mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3ct Benitoite (pear cut, 12.65×7.62mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 3ct Tanzanite (pear cut, 13.01×7.84mm) 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
 46% vs 47%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3ct Benitoite Pear (12.65×7.62mm, Blue) and 3ct Tanzanite Pear (13.01×7.84mm, 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.


3 Ct Benitoite (Pear) 3 Ct Tanzanite (Pear)
12.65×7.62 mm vs 13.01×7.84 mm
70.37 mm²   74.46 mm²
Face-up size outline for 3ct Tanzanite (13.01×7.84mm, pear cut)
Face-up size outline for 3ct Benitoite (12.65×7.62mm, pear cut)
3ct Benitoite Pear (12.65×7.62mm)
3ct Tanzanite Pear (13.01×7.84mm)
Difference: 6% (4.09 mm²)
3ct Tanzanite (Pear, 13.01×7.84mm) has approx. 6% more face-up area than 3ct Benitoite (Pear, 12.65×7.62mm).


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