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1.5ct Topaz (Round, 7.13×7.13mm, Bluish Green) vs 1.5ct Aquamarine (Round, 7.8×7.8mm, Light Bluish Green)


Quick summary: When looked from above (face-up position), 1.5ct Aquamarine (7.8×7.8mm, round cut) appears 20% larger than 1.5ct Topaz (7.13×7.13mm, round cut). See below how they compare side-by-side on a ring and finger.

1.5ct Topaz (round cut)
vs
 1.5ct Aquamarine (round cut)
bluish green
 
light bluish green
7.13×7.13 mm 7.8×7.8 mm
actual size
Actual size of 1.5ct Topaz (round cut, 7.13×7.13mm, Bluish Green color)   Actual size of 1.5ct Aquamarine (round cut, 7.8×7.8mm, Light Bluish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Bluish Green 1.5ct Topaz (round cut, 7.13×7.13mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Bluish Green 1.5ct Aquamarine (round cut, 7.8×7.8mm) 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
 43% vs 47%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.5ct Topaz Round (7.13×7.13mm, Bluish Green) and 1.5ct Aquamarine Round (7.8×7.8mm, Light Bluish 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, Topaz will face-up smaller than Aquamarine for a given carat weight, because it has higher specific gravity (3.53 vs. 2.72 - this means it's "heavier" compared to Aquamarine 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.


1.5 Ct Topaz (Round) 1.5 Ct Aquamarine (Round)
7.13×7.13 mm vs 7.8×7.8 mm
39.93 mm²   47.78 mm²
Face-up size outline for 1.5ct Aquamarine (7.8×7.8mm, round cut)
Face-up size outline for 1.5ct Topaz (7.13×7.13mm, round cut)
1.5ct Topaz Round (7.13×7.13mm)
1.5ct Aquamarine Round (7.8×7.8mm)
Difference: 20% (7.85 mm²)
1.5ct Aquamarine (Round, 7.8×7.8mm) has approx. 20% more face-up area than 1.5ct Topaz (Round, 7.13×7.13mm).


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