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1.5ct Sapphire (Trillion, 8.37×8.37mm, Blue) vs 1.5ct Tanzanite (Trillion, 8.88×8.88mm, Blue)


Quick summary: When looked from above (face-up position), 1.5ct Tanzanite (8.88×8.88mm, trillion cut) appears 13% larger than 1.5ct Sapphire (8.37×8.37mm, trillion cut). See below how they compare side-by-side on a ring and finger.

1.5ct Sapphire (trillion cut)
vs
1.5ct Tanzanite (trillion cut)
blue
 
blue
8.37×8.37 mm 8.88×8.88 mm
actual size
Actual size of 1.5ct Sapphire (trillion cut, 8.37×8.37mm, Blue color)   Actual size of 1.5ct Tanzanite (trillion cut, 8.88×8.88mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1.5ct Sapphire (trillion cut, 8.37×8.37mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1.5ct Tanzanite (trillion cut, 8.88×8.88mm) 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 53%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.5ct Sapphire Trillion (8.37×8.37mm, Blue) and 1.5ct Tanzanite Trillion (8.88×8.88mm, 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.


1.5 Ct Sapphire (Trillion) 1.5 Ct Tanzanite (Trillion)
8.37×8.37 mm vs 8.88×8.88 mm
43.44 mm²   48.89 mm²
Face-up size outline for 1.5ct Tanzanite (8.88×8.88mm, trillion cut)
Face-up size outline for 1.5ct Sapphire (8.37×8.37mm, trillion cut)
1.5ct Sapphire Trillion (8.37×8.37mm)
1.5ct Tanzanite Trillion (8.88×8.88mm)
Difference: 13% (5.45 mm²)
1.5ct Tanzanite (Trillion, 8.88×8.88mm) has approx. 13% more face-up area than 1.5ct Sapphire (Trillion, 8.37×8.37mm).


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