×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

1.5ct Zircon (Round, 6.51×6.51mm, White) vs 1.2ct Diamond (Round, 6.91×6.91mm, White)


Quick summary: When looked from above (face-up position), 1.2ct Diamond (6.91×6.91mm, round cut) appears 13% larger than 1.5ct Zircon (6.51×6.51mm, round cut). See below how they compare side-by-side on a ring and finger.

1.5ct Zircon (round cut)
vs
 1.2ct Diamond (round cut)
white
 
white
6.51×6.51 mm 6.91×6.91 mm
actual size
Actual size of 1.5ct Zircon (round cut, 6.51×6.51mm, White color)   Actual size of 1.2ct Diamond (round cut, 6.91×6.91mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1.5ct Zircon (round cut, 6.51×6.51mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1.2ct Diamond (round cut, 6.91×6.91mm) 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
 39% vs 41%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.5ct Zircon Round (6.51×6.51mm, White) and 1.2ct Diamond Round (6.91×6.91mm, 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, 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.


1.5 Ct Zircon (Round) 1.2 Ct Diamond (Round)
6.51×6.51 mm vs 6.91×6.91 mm
33.29 mm²   37.5 mm²
Face-up size outline for 1.2ct Diamond (6.91×6.91mm, round cut)
Face-up size outline for 1.5ct Zircon (6.51×6.51mm, round cut)
1.5ct Zircon Round (6.51×6.51mm)
1.2ct Diamond Round (6.91×6.91mm)
Difference: 13% (4.21 mm²)
1.2ct Diamond (Round, 6.91×6.91mm) has approx. 13% more face-up area than 1.5ct Zircon (Round, 6.51×6.51mm).


Popular comparisons: