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2.75ct Tanzanite (Cushion, 8.35×8.35mm, Blue) vs 1ct Sapphire (Cushion, 5.59×5.59mm, Blue)


Quick summary: When looked from above (face-up position), 2.75ct Tanzanite (8.35×8.35mm, cushion cut) appears 2.2 times larger than 1ct Sapphire (5.59×5.59mm, cushion cut). See below how they compare side-by-side on a ring and finger.

2.75ct Tanzanite (cushion cut)
vs
 1ct Sapphire (cushion cut)
blue
 
blue
8.35×8.35 mm 5.59×5.59 mm
actual size
Actual size of 2.75ct Tanzanite (cushion cut, 8.35×8.35mm, Blue color)   Actual size of 1ct Sapphire (cushion cut, 5.59×5.59mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 2.75ct Tanzanite (cushion cut, 8.35×8.35mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1ct Sapphire (cushion cut, 5.59×5.59mm) 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
 50% vs 34%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2.75ct Tanzanite Cushion (8.35×8.35mm, Blue) and 1ct Sapphire Cushion (5.59×5.59mm, 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.


2.75 Ct Tanzanite (Cushion) 1 Ct Sapphire (Cushion)
8.35×8.35 mm vs 5.59×5.59 mm
62.75 mm²   28.12 mm²
Face-up size outline for 2.75ct Tanzanite (8.35×8.35mm, cushion cut)
Face-up size outline for 1ct Sapphire (5.59×5.59mm, cushion cut)
2.75ct Tanzanite Cushion (8.35×8.35mm)
1ct Sapphire Cushion (5.59×5.59mm)
Difference: 123% (34.63 mm²)
2.75ct Tanzanite (Cushion, 8.35×8.35mm) has approx. 123% more face-up area than 1ct Sapphire (Cushion, 5.59×5.59mm). In other words, it's 2.23x larger.


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