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1.25ct Sapphire (Marquise, 10.48×5.24mm, Blue) vs 1.25ct Tanzanite (Marquise, 11.12×5.56mm, Blue)


Quick summary: When looked from above (face-up position), 1.25ct Tanzanite (11.12×5.56mm, marquise cut) appears 13% larger than 1.25ct Sapphire (10.48×5.24mm, marquise cut). See below how they compare side-by-side on a ring and finger.

1.25ct Sapphire (marquise cut)
vs
 1.25ct Tanzanite (marquise cut)
blue
 
blue
10.48×5.24 mm 11.12×5.56 mm
actual size
Actual size of 1.25ct Sapphire (marquise cut, 10.48×5.24mm, Blue color)   Actual size of 1.25ct Tanzanite (marquise cut, 11.12×5.56mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1.25ct Sapphire (marquise cut, 10.48×5.24mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1.25ct Tanzanite (marquise cut, 11.12×5.56mm) 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 1.25ct Sapphire Marquise (10.48×5.24mm, Blue) and 1.25ct Tanzanite Marquise (11.12×5.56mm, 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.


1.25 Ct Sapphire (Marquise) 1.25 Ct Tanzanite (Marquise)
10.48×5.24 mm vs 11.12×5.56 mm
38.99 mm²   43.9 mm²
Face-up size outline for 1.25ct Tanzanite (11.12×5.56mm, marquise cut)
Face-up size outline for 1.25ct Sapphire (10.48×5.24mm, marquise cut)
1.25ct Sapphire Marquise (10.48×5.24mm)
1.25ct Tanzanite Marquise (11.12×5.56mm)
Difference: 13% (4.91 mm²)
1.25ct Tanzanite (Marquise, 11.12×5.56mm) has approx. 13% more face-up area than 1.25ct Sapphire (Marquise, 10.48×5.24mm).


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