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7ct Benitoite (Pear, 16.77×10.1mm, Blue) vs 7ct Tanzanite (Pear, 17.26×10.4mm, Blue)


Quick summary: When looked from above (face-up position), 7ct Tanzanite (17.26×10.4mm, pear cut) appears 6% larger than 7ct Benitoite (16.77×10.1mm, pear cut). See below how they compare side-by-side on a ring and finger.

7ct Benitoite (pear cut)
vs
 7ct Tanzanite (pear cut)
blue
 
blue
16.77×10.1 mm 17.26×10.4 mm
actual size
Actual size of 7ct Benitoite (pear cut, 16.77×10.1mm, Blue color)   Actual size of 7ct Tanzanite (pear cut, 17.26×10.4mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 7ct Benitoite (pear cut, 16.77×10.1mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 7ct Tanzanite (pear cut, 17.26×10.4mm) 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
 60% vs 62%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7ct Benitoite Pear (16.77×10.1mm, Blue) and 7ct Tanzanite Pear (17.26×10.4mm, 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.


7 Ct Benitoite (Pear) 7 Ct Tanzanite (Pear)
16.77×10.1 mm vs 17.26×10.4 mm
123.65 mm²   131.04 mm²
Face-up size outline for 7ct Tanzanite (17.26×10.4mm, pear cut)
Face-up size outline for 7ct Benitoite (16.77×10.1mm, pear cut)
7ct Benitoite Pear (16.77×10.1mm)
7ct Tanzanite Pear (17.26×10.4mm)
Difference: 6% (7.39 mm²)
7ct Tanzanite (Pear, 17.26×10.4mm) has approx. 6% more face-up area than 7ct Benitoite (Pear, 16.77×10.1mm).


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