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0.75ct Tanzanite (Trillion, 7.05×7.05mm, Blue) vs 0.75ct Topaz (Trillion, 6.92×6.92mm, Blue)


Quick summary: When looked from above (face-up position), 0.75ct Tanzanite (7.05×7.05mm, trillion cut) appears 4% larger than 0.75ct Topaz (6.92×6.92mm, trillion cut). See below how they compare side-by-side on a ring and finger.

0.75ct Tanzanite (trillion cut)
vs
 0.75ct Topaz (trillion cut)
blue
 
blue
7.05×7.05 mm 6.92×6.92 mm
actual size
Actual size of 0.75ct Tanzanite (trillion cut, 7.05×7.05mm, Blue color)   Actual size of 0.75ct Topaz (trillion cut, 6.92×6.92mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 0.75ct Tanzanite (trillion cut, 7.05×7.05mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.75ct Topaz (trillion cut, 6.92×6.92mm) 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 41%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.75ct Tanzanite Trillion (7.05×7.05mm, Blue) and 0.75ct Topaz Trillion (6.92×6.92mm, 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, Topaz will face-up smaller than Tanzanite for a given carat weight, because it has higher specific gravity (3.53 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.


0.75 Ct Tanzanite (Trillion) 0.75 Ct Topaz (Trillion)
7.05×7.05 mm vs 6.92×6.92 mm
30.82 mm²   29.69 mm²
Face-up size outline for 0.75ct Tanzanite (7.05×7.05mm, trillion cut)
Face-up size outline for 0.75ct Topaz (6.92×6.92mm, trillion cut)
0.75ct Tanzanite Trillion (7.05×7.05mm)
0.75ct Topaz Trillion (6.92×6.92mm)
Difference: 4% (1.13 mm²)
0.75ct Tanzanite (Trillion, 7.05×7.05mm) has approx. 4% more face-up area than 0.75ct Topaz (Trillion, 6.92×6.92mm).


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