×
carat vs. color  length*  width*
  ×

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

1.67ct Tanzanite (Cushion, 7.07×7.07mm, Blue) vs 1.2ct Sapphire (Round, 6.35×6.35mm, Blue)


Quick summary: When looked from above (face-up position), 1.67ct Tanzanite (7.07×7.07mm, cushion cut) appears 42% larger than 1.2ct Sapphire (6.35×6.35mm, round cut). See below how they compare side-by-side on a ring and finger.

1.67ct Tanzanite (cushion cut)
vs
 1.2ct Sapphire (round cut)
blue
 
blue
7.07×7.07 mm 6.35×6.35 mm
actual size
Actual size of 1.67ct Tanzanite (cushion cut, 7.07×7.07mm, Blue color)   Actual size of 1.2ct Sapphire (round cut, 6.35×6.35mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1.67ct Tanzanite (cushion cut, 7.07×7.07mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1.2ct Sapphire (round cut, 6.35×6.35mm) 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
 42% vs 38%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.67ct Tanzanite Cushion (7.07×7.07mm, Blue) and 1.2ct Sapphire Round (6.35×6.35mm, 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 Tanzanite for a given carat weight, because it has higher specific gravity (4 vs. 3.35 - this means it's "heavier" compared to Tanzanite 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.


1.67 Ct Tanzanite (Cushion) 1.2 Ct Sapphire (Round)
7.07×7.07 mm vs 6.35×6.35 mm
44.99 mm²   31.67 mm²
Face-up size outline for 1.67ct Tanzanite (7.07×7.07mm, cushion cut)
Face-up size outline for 1.2ct Sapphire (6.35×6.35mm, round cut)
1.67ct Tanzanite Cushion (7.07×7.07mm)
1.2ct Sapphire Round (6.35×6.35mm)
Difference: 42% (13.32 mm²)
1.67ct Tanzanite (Cushion, 7.07×7.07mm) has approx. 42% more face-up area than 1.2ct Sapphire (Round, 6.35×6.35mm).


Popular comparisons: