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4ct Topaz (Emerald, 10.57×7.83mm, Blue) vs 0.54ct Sapphire (Round, 4.87×4.87mm, Blue)


Quick summary: When looked from above (face-up position), 4ct Topaz (10.57×7.83mm, emerald cut) appears 4.1 times larger than 0.54ct Sapphire (4.87×4.87mm, round cut). See below how they compare side-by-side on a ring and finger.

4ct Topaz (emerald cut)
vs
 0.54ct Sapphire (round cut)
blue
 
blue
10.57×7.83 mm 4.87×4.87 mm
actual size
Actual size of 4ct Topaz (emerald cut, 10.57×7.83mm, Blue color)   Actual size of 0.54ct Sapphire (round cut, 4.87×4.87mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 4ct Topaz (emerald cut, 10.57×7.83mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.54ct Sapphire (round cut, 4.87×4.87mm) 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
 47% vs 29%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Topaz Emerald (10.57×7.83mm, Blue) and 0.54ct Sapphire Round (4.87×4.87mm, 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, Sapphire will face-up smaller than Topaz for a given carat weight, because it has higher specific gravity (4 vs. 3.53 - this means it's "heavier" compared to Topaz 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.


4 Ct Topaz (Emerald) 0.54 Ct Sapphire (Round)
10.57×7.83 mm vs 4.87×4.87 mm
76.97 mm²   18.63 mm²
Face-up size outline for 4ct Topaz (10.57×7.83mm, emerald cut)
Face-up size outline for 0.54ct Sapphire (4.87×4.87mm, round cut)
4ct Topaz Emerald (10.57×7.83mm)
0.54ct Sapphire Round (4.87×4.87mm)
Difference: 313% (58.34 mm²)
4ct Topaz (Emerald, 10.57×7.83mm) has approx. 313% more face-up area than 0.54ct Sapphire (Round, 4.87×4.87mm). In other words, it's 4.13x larger.


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