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8ct Sapphire (Oval, 15.12×10.08mm, Blue) vs 8ct Tanzanite (Emerald, 13.62×10.09mm, Blue)


Quick summary: When looked from above (face-up position), 8ct Tanzanite (13.62×10.09mm, emerald cut) appears 2% larger than 8ct Sapphire (15.12×10.08mm, oval cut). See below how they compare side-by-side on a ring and finger.

8ct Sapphire (oval cut)
vs
 8ct Tanzanite (emerald cut)
blue
 
blue
15.12×10.08 mm 13.62×10.09 mm
actual size
Actual size of 8ct Sapphire (oval cut, 15.12×10.08mm, Blue color)   Actual size of 8ct Tanzanite (emerald cut, 13.62×10.09mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 8ct Sapphire (oval cut, 15.12×10.08mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 8ct Tanzanite (emerald cut, 13.62×10.09mm) 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
 60% vs 60%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 8ct Sapphire Oval (15.12×10.08mm, Blue) and 8ct Tanzanite Emerald (13.62×10.09mm, 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.


8 Ct Sapphire (Oval) 8 Ct Tanzanite (Emerald)
15.12×10.08 mm vs 13.62×10.09 mm
124.98 mm²   127.81 mm²
Face-up size outline for 8ct Tanzanite (13.62×10.09mm, emerald cut)
Face-up size outline for 8ct Sapphire (15.12×10.08mm, oval cut)
8ct Sapphire Oval (15.12×10.08mm)
8ct Tanzanite Emerald (13.62×10.09mm)
Difference: 2% (2.83 mm²)
8ct Tanzanite (Emerald, 13.62×10.09mm) has approx. 2% more face-up area than 8ct Sapphire (Oval, 15.12×10.08mm).


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