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1ct Tanzanite (Pear, 8.85×5.33mm, Blue) vs 1ct Diamond (Pear, 9.05×5.45mm, White)


Quick summary: When looked from above (face-up position), 1ct Diamond (9.05×5.45mm, pear cut) appears 5% larger than 1ct Tanzanite (8.85×5.33mm, pear cut). See below how they compare side-by-side on a ring and finger.

1ct Tanzanite (pear cut)
vs
 1ct Diamond (pear cut)
blue
 
white
8.85×5.33 mm 9.05×5.45 mm
actual size
Actual size of 1ct Tanzanite (pear cut, 8.85×5.33mm, Blue color)   Actual size of 1ct Diamond (pear cut, 9.05×5.45mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1ct Tanzanite (pear cut, 8.85×5.33mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1ct Diamond (pear cut, 9.05×5.45mm) 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
 32% vs 33%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Tanzanite Pear (8.85×5.33mm, Blue) and 1ct Diamond Pear (9.05×5.45mm, White) 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, Diamond will face-up smaller than Tanzanite for a given carat weight, because it has higher specific gravity (3.52 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.


1 Ct Tanzanite (Pear) 1 Ct Diamond (Pear)
8.85×5.33 mm vs 9.05×5.45 mm
34.43 mm²   36.01 mm²
Face-up size outline for 1ct Diamond (9.05×5.45mm, pear cut)
Face-up size outline for 1ct Tanzanite (8.85×5.33mm, pear cut)
1ct Tanzanite Pear (8.85×5.33mm)
1ct Diamond Pear (9.05×5.45mm)
Difference: 5% (1.58 mm²)
1ct Diamond (Pear, 9.05×5.45mm) has approx. 5% more face-up area than 1ct Tanzanite (Pear, 8.85×5.33mm).


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