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1.67ct Sapphire (Round, 7.09×7.09mm, Dark Bluish Green) vs 0.25ct Diamond (Round, 4.09×4.09mm, White)


Quick summary: When looked from above (face-up position), 1.67ct Sapphire (7.09×7.09mm, round cut) appears 3 times larger than 0.25ct Diamond (4.09×4.09mm, round cut). See below how they compare side-by-side on a ring and finger.

1.67ct Sapphire (round cut)
vs
 0.25ct Diamond (round cut)
dark bluish green
 
white
7.09×7.09 mm 4.09×4.09 mm
actual size
Actual size of 1.67ct Sapphire (round cut, 7.09×7.09mm, Dark Bluish Green color)   Actual size of 0.25ct Diamond (round cut, 4.09×4.09mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Bluish Green 1.67ct Sapphire (round cut, 7.09×7.09mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.25ct Diamond (round cut, 4.09×4.09mm) 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 25%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.67ct Sapphire Round (7.09×7.09mm, Dark Bluish Green) and 0.25ct Diamond Round (4.09×4.09mm, 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, Sapphire will face-up smaller than Diamond for a given carat weight, because it has higher specific gravity (4 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.


1.67 Ct Sapphire (Round) 0.25 Ct Diamond (Round)
7.09×7.09 mm vs 4.09×4.09 mm
39.48 mm²   13.14 mm²
Face-up size outline for 1.67ct Sapphire (7.09×7.09mm, round cut)
Face-up size outline for 0.25ct Diamond (4.09×4.09mm, round cut)
1.67ct Sapphire Round (7.09×7.09mm)
0.25ct Diamond Round (4.09×4.09mm)
Difference: 200% (26.34 mm²)
1.67ct Sapphire (Round, 7.09×7.09mm) has approx. 200% more face-up area than 0.25ct Diamond (Round, 4.09×4.09mm). In other words, it's 3x larger.


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