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10ct Benitoite (Pear, 18.89×11.38mm, Blue) vs 10ct Tanzanite (Pear, 19.44×11.71mm, Blue)


Quick summary: When looked from above (face-up position), 10ct Tanzanite (19.44×11.71mm, pear cut) appears 6% larger than 10ct Benitoite (18.89×11.38mm, pear cut). See below how they compare side-by-side on a ring and finger.

10ct Benitoite (pear cut)
vs
 10ct Tanzanite (pear cut)
blue
 
blue
18.89×11.38 mm 19.44×11.71 mm
actual size
Actual size of 10ct Benitoite (pear cut, 18.89×11.38mm, Blue color)   Actual size of 10ct Tanzanite (pear cut, 19.44×11.71mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 10ct Benitoite (pear cut, 18.89×11.38mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 10ct Tanzanite (pear cut, 19.44×11.71mm) 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
 68% vs 70%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 10ct Benitoite Pear (18.89×11.38mm, Blue) and 10ct Tanzanite Pear (19.44×11.71mm, 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.


10 Ct Benitoite (Pear) 10 Ct Tanzanite (Pear)
18.89×11.38 mm vs 19.44×11.71 mm
156.93 mm²   166.18 mm²
Face-up size outline for 10ct Tanzanite (19.44×11.71mm, pear cut)
Face-up size outline for 10ct Benitoite (18.89×11.38mm, pear cut)
10ct Benitoite Pear (18.89×11.38mm)
10ct Tanzanite Pear (19.44×11.71mm)
Difference: 6% (9.25 mm²)
10ct Tanzanite (Pear, 19.44×11.71mm) has approx. 6% more face-up area than 10ct Benitoite (Pear, 18.89×11.38mm).


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