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10ct Tanzanite (Round, 13.73×13.73mm, Blue) vs 1ct Emerald (Round, 6.37×6.37mm, Green)


Quick summary: When looked from above (face-up position), 10ct Tanzanite (13.73×13.73mm, round cut) appears 4.7 times larger than 1ct Emerald (6.37×6.37mm, round cut). See below how they compare side-by-side on a ring and finger.

10ct Tanzanite (round cut)
vs
 1ct Emerald (round cut)
blue
 
green
13.73×13.73 mm 6.37×6.37 mm
actual size
Actual size of 10ct Tanzanite (round cut, 13.73×13.73mm, Blue color)   Actual size of 1ct Emerald (round cut, 6.37×6.37mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 10ct Tanzanite (round cut, 13.73×13.73mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 1ct Emerald (round cut, 6.37×6.37mm) 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
 82% vs 38%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 10ct Tanzanite Round (13.73×13.73mm, Blue) and 1ct Emerald Round (6.37×6.37mm, Green) 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, Tanzanite will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (3.35 vs. 2.72 - this means it's "heavier" compared to Emerald 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.


10 Ct Tanzanite (Round) 1 Ct Emerald (Round)
13.73×13.73 mm vs 6.37×6.37 mm
148.06 mm²   31.87 mm²
Face-up size outline for 10ct Tanzanite (13.73×13.73mm, round cut)
Face-up size outline for 1ct Emerald (6.37×6.37mm, round cut)
10ct Tanzanite Round (13.73×13.73mm)
1ct Emerald Round (6.37×6.37mm)
Difference: 365% (116.19 mm²)
10ct Tanzanite (Round, 13.73×13.73mm) has approx. 365% more face-up area than 1ct Emerald (Round, 6.37×6.37mm). In other words, it's 4.65x larger.


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