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13ct Tanzanite (Cushion, 14.02×14.02mm, Blue) vs 8.8ct Sapphire (Cushion, 11.54×11.54mm, Blue)


Quick summary: When looked from above (face-up position), 13ct Tanzanite (14.02×14.02mm, cushion cut) appears 48% larger than 8.8ct Sapphire (11.54×11.54mm, cushion cut). See below how they compare side-by-side on a ring and finger.

13ct Tanzanite (cushion cut)
vs
 8.8ct Sapphire (cushion cut)
blue
 
blue
14.02×14.02 mm 11.54×11.54 mm
actual size
Actual size of 13ct Tanzanite (cushion cut, 14.02×14.02mm, Blue color)   Actual size of 8.8ct Sapphire (cushion cut, 11.54×11.54mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 13ct Tanzanite (cushion cut, 14.02×14.02mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 8.8ct Sapphire (cushion cut, 11.54×11.54mm) 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
 83% vs 69%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 13ct Tanzanite Cushion (14.02×14.02mm, Blue) and 8.8ct Sapphire Cushion (11.54×11.54mm, 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, Sapphire will face-up smaller than Tanzanite for a given carat weight, because it has higher specific gravity (4 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.


13 Ct Tanzanite (Cushion) 8.8 Ct Sapphire (Cushion)
14.02×14.02 mm vs 11.54×11.54 mm
176.9 mm²   119.85 mm²
Face-up size outline for 13ct Tanzanite (14.02×14.02mm, cushion cut)
Face-up size outline for 8.8ct Sapphire (11.54×11.54mm, cushion cut)
13ct Tanzanite Cushion (14.02×14.02mm)
8.8ct Sapphire Cushion (11.54×11.54mm)
Difference: 48% (57.05 mm²)
13ct Tanzanite (Cushion, 14.02×14.02mm) has approx. 48% more face-up area than 8.8ct Sapphire (Cushion, 11.54×11.54mm).


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