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3.5ct Tanzanite (Emerald, 10.34×7.66mm, Blue) vs 0.8ct Diamond (Round, 6.03×6.03mm, White)


Quick summary: When looked from above (face-up position), 3.5ct Tanzanite (10.34×7.66mm, emerald cut) appears 2.6 times larger than 0.8ct Diamond (6.03×6.03mm, round cut). See below how they compare side-by-side on a ring and finger.

3.5ct Tanzanite (emerald cut)
vs
 0.8ct Diamond (round cut)
blue
 
white
10.34×7.66 mm 6.03×6.03 mm
actual size
Actual size of 3.5ct Tanzanite (emerald cut, 10.34×7.66mm, Blue color)   Actual size of 0.8ct Diamond (round cut, 6.03×6.03mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3.5ct Tanzanite (emerald cut, 10.34×7.66mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.8ct Diamond (round cut, 6.03×6.03mm) 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
 46% vs 36%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3.5ct Tanzanite Emerald (10.34×7.66mm, Blue) and 0.8ct Diamond Round (6.03×6.03mm, White) 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, Diamond will face-up smaller than Tanzanite for a given carat weight, because it has higher specific gravity (3.52 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.


3.5 Ct Tanzanite (Emerald) 0.8 Ct Diamond (Round)
10.34×7.66 mm vs 6.03×6.03 mm
73.66 mm²   28.56 mm²
Face-up size outline for 3.5ct Tanzanite (10.34×7.66mm, emerald cut)
Face-up size outline for 0.8ct Diamond (6.03×6.03mm, round cut)
3.5ct Tanzanite Emerald (10.34×7.66mm)
0.8ct Diamond Round (6.03×6.03mm)
Difference: 158% (45.1 mm²)
3.5ct Tanzanite (Emerald, 10.34×7.66mm) has approx. 158% more face-up area than 0.8ct Diamond (Round, 6.03×6.03mm). In other words, it's 2.58x larger.


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