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1ct Sapphire (Trillion, 7.03×7.03mm, Blue) vs 1ct Tanzanite (Emerald, 6.8×5.04mm, Light Blue)


Quick summary: When looked from above (face-up position), 1ct Tanzanite (6.8×5.04mm, emerald cut) appears 4% larger than 1ct Sapphire (7.03×7.03mm, trillion cut). See below how they compare side-by-side on a ring and finger.

1ct Sapphire (trillion cut)
vs
1ct Tanzanite (emerald cut)
blue
 
light blue
7.03×7.03 mm 6.8×5.04 mm
actual size
Actual size of 1ct Sapphire (trillion cut, 7.03×7.03mm, Blue color)   Actual size of 1ct Tanzanite (emerald cut, 6.8×5.04mm, Light Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1ct Sapphire (trillion cut, 7.03×7.03mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 1ct Tanzanite (emerald cut, 6.8×5.04mm) 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
42% vs 30%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Sapphire Trillion (7.03×7.03mm, Blue) and 1ct Tanzanite Emerald (6.8×5.04mm, Light 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 Ct Sapphire (Trillion) 1 Ct Tanzanite (Emerald)
7.03×7.03 mm vs 6.8×5.04 mm
30.64 mm²   31.87 mm²
Face-up size outline for 1ct Tanzanite (6.8×5.04mm, emerald cut)
Face-up size outline for 1ct Sapphire (7.03×7.03mm, trillion cut)
1ct Sapphire Trillion (7.03×7.03mm)
1ct Tanzanite Emerald (6.8×5.04mm)
Difference: 4% (1.23 mm²)
1ct Tanzanite (Emerald, 6.8×5.04mm) has approx. 4% more face-up area than 1ct Sapphire (Trillion, 7.03×7.03mm).


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