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3ct Tanzanite (Trillion, 10.81×10.81mm, Blue) vs 3ct Ruby (Trillion, 10.14×10.14mm, Red)


Quick summary: When looked from above (face-up position), 3ct Tanzanite (10.81×10.81mm, trillion cut) appears 14% larger than 3ct Ruby (10.14×10.14mm, trillion cut). See below how they compare side-by-side on a ring and finger.

3ct Tanzanite (trillion cut)
vs
 3ct Ruby (trillion cut)
blue
 
red
10.81×10.81 mm 10.14×10.14 mm
actual size
Actual size of 3ct Tanzanite (trillion cut, 10.81×10.81mm, Blue color)   Actual size of 3ct Ruby (trillion cut, 10.14×10.14mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3ct Tanzanite (trillion cut, 10.81×10.81mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 3ct Ruby (trillion cut, 10.14×10.14mm) 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
 64% vs 61%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3ct Tanzanite Trillion (10.81×10.81mm, Blue) and 3ct Ruby Trillion (10.14×10.14mm, Red) 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, Ruby 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.


3 Ct Tanzanite (Trillion) 3 Ct Ruby (Trillion)
10.81×10.81 mm vs 10.14×10.14 mm
72.45 mm²   63.75 mm²
Face-up size outline for 3ct Tanzanite (10.81×10.81mm, trillion cut)
Face-up size outline for 3ct Ruby (10.14×10.14mm, trillion cut)
3ct Tanzanite Trillion (10.81×10.81mm)
3ct Ruby Trillion (10.14×10.14mm)
Difference: 14% (8.7 mm²)
3ct Tanzanite (Trillion, 10.81×10.81mm) has approx. 14% more face-up area than 3ct Ruby (Trillion, 10.14×10.14mm).


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