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3ct Tanzanite (Oval, 11.63×7.75mm, Blue) vs 8.5ct Sapphire (Emerald, 13.03×9.65mm, Blue)


Quick summary: When looked from above (face-up position), 8.5ct Sapphire (13.03×9.65mm, emerald cut) appears 58% larger than 3ct Tanzanite (11.63×7.75mm, oval cut). See below how they compare side-by-side on a ring and finger.

3ct Tanzanite (oval cut)
vs
 8.5ct Sapphire (emerald cut)
blue
 
blue
11.63×7.75 mm 13.03×9.65 mm
actual size
Actual size of 3ct Tanzanite (oval cut, 11.63×7.75mm, Blue color)   Actual size of 8.5ct Sapphire (emerald cut, 13.03×9.65mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3ct Tanzanite (oval cut, 11.63×7.75mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 8.5ct Sapphire (emerald cut, 13.03×9.65mm) 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
 46% vs 58%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3ct Tanzanite Oval (11.63×7.75mm, Blue) and 8.5ct Sapphire Emerald (13.03×9.65mm, 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.


3 Ct Tanzanite (Oval) 8.5 Ct Sapphire (Emerald)
11.63×7.75 mm vs 13.03×9.65 mm
73.91 mm²   116.94 mm²
Face-up size outline for 8.5ct Sapphire (13.03×9.65mm, emerald cut)
Face-up size outline for 3ct Tanzanite (11.63×7.75mm, oval cut)
3ct Tanzanite Oval (11.63×7.75mm)
8.5ct Sapphire Emerald (13.03×9.65mm)
Difference: 58% (43.03 mm²)
8.5ct Sapphire (Emerald, 13.03×9.65mm) has approx. 58% more face-up area than 3ct Tanzanite (Oval, 11.63×7.75mm).


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