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2ct Tanzanite (Marquise, 13×6.5mm, Blue) vs 2ct Topaz (Marquise, 12.78×6.39mm, Blue)


Quick summary: When looked from above (face-up position), 2ct Tanzanite (13×6.5mm, marquise cut) appears 3% larger than 2ct Topaz (12.78×6.39mm, marquise cut). See below how they compare side-by-side on a ring and finger.

2ct Tanzanite (marquise cut)
vs
 2ct Topaz (marquise cut)
blue
 
blue
13×6.5 mm 12.78×6.39 mm
actual size
Actual size of 2ct Tanzanite (marquise cut, 13×6.5mm, Blue color)   Actual size of 2ct Topaz (marquise cut, 12.78×6.39mm, Blue 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, 13×6.5mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 2ct Topaz (marquise cut, 12.78×6.39mm) 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
 39% vs 38%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 2ct Tanzanite Marquise (13×6.5mm, Blue) and 2ct Topaz Marquise (12.78×6.39mm, 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.


2 Ct Tanzanite (Marquise) 2 Ct Topaz (Marquise)
13×6.5 mm vs 12.78×6.39 mm
60 mm²   57.98 mm²
Face-up size outline for 2ct Tanzanite (13×6.5mm, marquise cut)
Face-up size outline for 2ct Topaz (12.78×6.39mm, marquise cut)
2ct Tanzanite Marquise (13×6.5mm)
2ct Topaz Marquise (12.78×6.39mm)
Difference: 3% (2.02 mm²)
2ct Tanzanite (Marquise, 13×6.5mm) has approx. 3% more face-up area than 2ct Topaz (Marquise, 12.78×6.39mm).


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