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0.7ct Tanzanite (Round, 5.66×5.66mm, Blue) vs 4.33ct Sapphire (Oval, 10.33×8.22mm, Blue)


Quick summary: When looked from above (face-up position), 4.33ct Sapphire (10.33×8.22mm, oval cut) appears 2.8 times larger than 0.7ct Tanzanite (5.66×5.66mm, round cut). See below how they compare side-by-side on a ring and finger.

0.7ct Tanzanite (round cut)
vs
 4.33ct Sapphire (oval cut)
blue
 
blue
5.66×5.66 mm 10.33×8.22 mm
actual size
Actual size of 0.7ct Tanzanite (round cut, 5.66×5.66mm, Blue color)   Actual size of 4.33ct Sapphire (oval cut, 10.33×8.22mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 0.7ct Tanzanite (round cut, 5.66×5.66mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 4.33ct Sapphire (oval cut, 10.33×8.22mm) 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
 34% vs 49%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.7ct Tanzanite Round (5.66×5.66mm, Blue) and 4.33ct Sapphire Oval (10.33×8.22mm, 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.


0.7 Ct Tanzanite (Round) 4.33 Ct Sapphire (Oval)
5.66×5.66 mm vs 10.33×8.22 mm
25.16 mm²   69.63 mm²
Face-up size outline for 4.33ct Sapphire (10.33×8.22mm, oval cut)
Face-up size outline for 0.7ct Tanzanite (5.66×5.66mm, round cut)
0.7ct Tanzanite Round (5.66×5.66mm)
4.33ct Sapphire Oval (10.33×8.22mm)
Difference: 177% (44.47 mm²)
4.33ct Sapphire (Oval, 10.33×8.22mm) has approx. 177% more face-up area than 0.7ct Tanzanite (Round, 5.66×5.66mm). In other words, it's 2.77x larger.


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