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1.65ct Diamond (Round, 7.68×7.68mm, White) vs 1.65ct Zircon (Round, 6.72×6.72mm, Blue)


Quick summary: When looked from above (face-up position), 1.65ct Diamond (7.68×7.68mm, round cut) appears 31% larger than 1.65ct Zircon (6.72×6.72mm, round cut). See below how they compare side-by-side on a ring and finger.

1.65ct Diamond (round cut)
vs
 1.65ct Zircon (round cut)
white
 
blue
7.68×7.68 mm 6.72×6.72 mm
actual size
Actual size of 1.65ct Diamond (round cut, 7.68×7.68mm, White color)   Actual size of 1.65ct Zircon (round cut, 6.72×6.72mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1.65ct Diamond (round cut, 7.68×7.68mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1.65ct Zircon (round cut, 6.72×6.72mm) 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
 46% vs 40%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.65ct Diamond Round (7.68×7.68mm, White) and 1.65ct Zircon Round (6.72×6.72mm, 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, Zircon will face-up smaller than Diamond for a given carat weight, because it has higher specific gravity (4.7 vs. 3.52 - this means it's "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.


1.65 Ct Diamond (Round) 1.65 Ct Zircon (Round)
7.68×7.68 mm vs 6.72×6.72 mm
46.32 mm²   35.47 mm²
Face-up size outline for 1.65ct Diamond (7.68×7.68mm, round cut)
Face-up size outline for 1.65ct Zircon (6.72×6.72mm, round cut)
1.65ct Diamond Round (7.68×7.68mm)
1.65ct Zircon Round (6.72×6.72mm)
Difference: 31% (10.85 mm²)
1.65ct Diamond (Round, 7.68×7.68mm) has approx. 31% more face-up area than 1.65ct Zircon (Round, 6.72×6.72mm).


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