×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

1.5ct Tanzanite (Pear, 10.14×6.11mm, Blue) vs 3ct Diamond (Pear, 13.05×7.86mm, White)


Quick summary: When looked from above (face-up position), 3ct Diamond (13.05×7.86mm, pear cut) appears 66% larger than 1.5ct Tanzanite (10.14×6.11mm, pear cut). See below how they compare side-by-side on a ring and finger.

1.5ct Tanzanite (pear cut)
vs
 3ct Diamond (pear cut)
blue
 
white
10.14×6.11 mm 13.05×7.86 mm
actual size
Actual size of 1.5ct Tanzanite (pear cut, 10.14×6.11mm, Blue color)   Actual size of 3ct Diamond (pear cut, 13.05×7.86mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1.5ct Tanzanite (pear cut, 10.14×6.11mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 3ct Diamond (pear cut, 13.05×7.86mm) 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
 37% vs 47%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.5ct Tanzanite Pear (10.14×6.11mm, Blue) and 3ct Diamond Pear (13.05×7.86mm, 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.


1.5 Ct Tanzanite (Pear) 3 Ct Diamond (Pear)
10.14×6.11 mm vs 13.05×7.86 mm
45.23 mm²   74.88 mm²
Face-up size outline for 3ct Diamond (13.05×7.86mm, pear cut)
Face-up size outline for 1.5ct Tanzanite (10.14×6.11mm, pear cut)
1.5ct Tanzanite Pear (10.14×6.11mm)
3ct Diamond Pear (13.05×7.86mm)
Difference: 66% (29.65 mm²)
3ct Diamond (Pear, 13.05×7.86mm) has approx. 66% more face-up area than 1.5ct Tanzanite (Pear, 10.14×6.11mm).


Popular comparisons: