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0.5ct Topaz (Emerald, 5.28×3.91mm, Blue) vs 1ct Diamond (Emerald, 6.68×4.95mm, White)


Quick summary: When looked from above (face-up position), 1ct Diamond (6.68×4.95mm, emerald cut) appears 60% larger than 0.5ct Topaz (5.28×3.91mm, emerald cut). See below how they compare side-by-side on a ring and finger.

0.5ct Topaz (emerald cut)
vs
 1ct Diamond (emerald cut)
blue
 
white
5.28×3.91 mm 6.68×4.95 mm
actual size
Actual size of 0.5ct Topaz (emerald cut, 5.28×3.91mm, Blue color)   Actual size of 1ct Diamond (emerald cut, 6.68×4.95mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 0.5ct Topaz (emerald cut, 5.28×3.91mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1ct Diamond (emerald cut, 6.68×4.95mm) 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
 24% vs 30%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.5ct Topaz Emerald (5.28×3.91mm, Blue) and 1ct Diamond Emerald (6.68×4.95mm, White) 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 slightly smaller than Diamond for a given carat weight, because it has higher specific gravity (3.53 vs. 3.52 - this means it's "slightly heavier" compared to Diamond 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.


0.5 Ct Topaz (Emerald) 1 Ct Diamond (Emerald)
5.28×3.91 mm vs 6.68×4.95 mm
19.2 mm²   30.75 mm²
Face-up size outline for 1ct Diamond (6.68×4.95mm, emerald cut)
Face-up size outline for 0.5ct Topaz (5.28×3.91mm, emerald cut)
0.5ct Topaz Emerald (5.28×3.91mm)
1ct Diamond Emerald (6.68×4.95mm)
Difference: 60% (11.55 mm²)
1ct Diamond (Emerald, 6.68×4.95mm) has approx. 60% more face-up area than 0.5ct Topaz (Emerald, 5.28×3.91mm).


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