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2ct Tanzanite (Marquise, 13.26×6.63mm, Blue) vs 2ct Diamond (Marquise, 13.08×6.54mm, White)


Quick summary: When looked from above (face-up position), 2ct Tanzanite (13.26×6.63mm, marquise cut) appears 3% larger than 2ct Diamond (13.08×6.54mm, marquise cut). See below how they compare side-by-side on a ring and finger.

2ct Tanzanite (marquise cut)
vs
 2ct Diamond (marquise cut)
blue
 
white
13.26×6.63 mm 13.08×6.54 mm
actual size
Actual size of 2ct Tanzanite (marquise cut, 13.26×6.63mm, Blue color)   Actual size of 2ct Diamond (marquise cut, 13.08×6.54mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 2ct Tanzanite (marquise cut, 13.26×6.63mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 2ct Diamond (marquise cut, 13.08×6.54mm) 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
 40% vs 39%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 2ct Tanzanite Marquise (13.26×6.63mm, Blue) and 2ct Diamond Marquise (13.08×6.54mm, 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.


2 Ct Tanzanite (Marquise) 2 Ct Diamond (Marquise)
13.26×6.63 mm vs 13.08×6.54 mm
62.42 mm²   60.74 mm²
Face-up size outline for 2ct Tanzanite (13.26×6.63mm, marquise cut)
Face-up size outline for 2ct Diamond (13.08×6.54mm, marquise cut)
2ct Tanzanite Marquise (13.26×6.63mm)
2ct Diamond Marquise (13.08×6.54mm)
Difference: 3% (1.68 mm²)
2ct Tanzanite (Marquise, 13.26×6.63mm) has approx. 3% more face-up area than 2ct Diamond (Marquise, 13.08×6.54mm).


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