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5ct Topaz (Emerald, 11.38×8.43mm, Blue) vs 1.8ct Tourmaline (Trillion, 9.31×9.31mm, Violet)


Quick summary: When looked from above (face-up position), 5ct Topaz (11.38×8.43mm, emerald cut) appears 66% larger than 1.8ct Tourmaline (9.31×9.31mm, trillion cut). See below how they compare side-by-side on a ring and finger.

5ct Topaz (emerald cut)
vs
 1.8ct Tourmaline (trillion cut)
blue
 
violet
11.38×8.43 mm 9.31×9.31 mm
actual size
Actual size of 5ct Topaz (emerald cut, 11.38×8.43mm, Blue color)   Actual size of 1.8ct Tourmaline (trillion cut, 9.31×9.31mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 5ct Topaz (emerald cut, 11.38×8.43mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 1.8ct Tourmaline (trillion cut, 9.31×9.31mm) 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
 50% vs 56%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5ct Topaz Emerald (11.38×8.43mm, Blue) and 1.8ct Tourmaline Trillion (9.31×9.31mm, Violet) 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 Tourmaline for a given carat weight, because it has higher specific gravity (3.53 vs. 3.06 - this means it's "heavier" compared to Tourmaline 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.


5 Ct Topaz (Emerald) 1.8 Ct Tourmaline (Trillion)
11.38×8.43 mm vs 9.31×9.31 mm
89.22 mm²   53.74 mm²
Face-up size outline for 5ct Topaz (11.38×8.43mm, emerald cut)
Face-up size outline for 1.8ct Tourmaline (9.31×9.31mm, trillion cut)
5ct Topaz Emerald (11.38×8.43mm)
1.8ct Tourmaline Trillion (9.31×9.31mm)
Difference: 66% (35.48 mm²)
5ct Topaz (Emerald, 11.38×8.43mm) has approx. 66% more face-up area than 1.8ct Tourmaline (Trillion, 9.31×9.31mm).


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