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1.57ct Diaspore (Pear, 10.19×6.14mm, Light Yellowish Green) vs 6.3ct Tanzanite (Cushion, 12×9mm, Blue)


Quick summary: When looked from above (face-up position), 6.3ct Tanzanite (12×9mm, cushion cut) appears 2.1 times larger than 1.57ct Diaspore (10.19×6.14mm, pear cut). See below how they compare side-by-side on a ring and finger.

1.57ct Diaspore (pear cut)
vs
 6.3ct Tanzanite (cushion cut)
light yellowish green
 
blue
10.19×6.14 mm 12×9 mm
actual size
Actual size of 1.57ct Diaspore (pear cut, 10.19×6.14mm, Light Yellowish Green color)   Actual size of 6.3ct Tanzanite (cushion cut, 12×9mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Yellowish Green 1.57ct Diaspore (pear cut, 10.19×6.14mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 6.3ct Tanzanite (cushion cut, 12×9mm) 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 54%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.57ct Diaspore Pear (10.19×6.14mm, Light Yellowish Green) and 6.3ct Tanzanite Cushion (12×9mm, 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, Diaspore will face-up slightly smaller than Tanzanite for a given carat weight, because it has higher specific gravity (3.4 vs. 3.35 - this means it's "slightly 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.


1.57 Ct Diaspore (Pear) 6.3 Ct Tanzanite (Cushion)
10.19×6.14 mm vs 12×9 mm
45.67 mm²   97.2 mm²
Face-up size outline for 6.3ct Tanzanite (12×9mm, cushion cut)
Face-up size outline for 1.57ct Diaspore (10.19×6.14mm, pear cut)
1.57ct Diaspore Pear (10.19×6.14mm)
6.3ct Tanzanite Cushion (12×9mm)
Difference: 113% (51.53 mm²)
6.3ct Tanzanite (Cushion, 12×9mm) has approx. 113% more face-up area than 1.57ct Diaspore (Pear, 10.19×6.14mm). In other words, it's 2.13x larger.


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