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0.75ct Aquamarine (Cabochon, 7.07×4.71mm, Light Blue) vs 0.75ct Topaz (Cabochon, 6.48×4.32mm, Blue)


Quick summary: When looked from above (face-up position), 0.75ct Aquamarine (7.07×4.71mm, cabochon cut) appears 19% larger than 0.75ct Topaz (6.48×4.32mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

0.75ct Aquamarine (cabochon cut)
vs
 0.75ct Topaz (cabochon cut)
light blue
 
blue
7.07×4.71 mm 6.48×4.32 mm
actual size
Actual size of 0.75ct Aquamarine (cabochon cut, 7.07×4.71mm, Light Blue color)   Actual size of 0.75ct Topaz (cabochon cut, 6.48×4.32mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Blue 0.75ct Aquamarine (cabochon cut, 7.07×4.71mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.75ct Topaz (cabochon cut, 6.48×4.32mm) 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
 28% vs 26%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.75ct Aquamarine Cabochon (7.07×4.71mm, Light Blue) and 0.75ct Topaz Cabochon (6.48×4.32mm, 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 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.


0.75 Ct Aquamarine (Cabochon) 0.75 Ct Topaz (Cabochon)
7.07×4.71 mm vs 6.48×4.32 mm
27.31 mm²   22.95 mm²
Face-up size outline for 0.75ct Aquamarine (7.07×4.71mm, cabochon cut)
Face-up size outline for 0.75ct Topaz (6.48×4.32mm, cabochon cut)
0.75ct Aquamarine Cabochon (7.07×4.71mm)
0.75ct Topaz Cabochon (6.48×4.32mm)
Difference: 19% (4.36 mm²)
0.75ct Aquamarine (Cabochon, 7.07×4.71mm) has approx. 19% more face-up area than 0.75ct Topaz (Cabochon, 6.48×4.32mm).


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