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1.66ct Spinel (Pear, 10.19×6.14mm, Light Violet) vs 3ct Diamond (Pear, 13.05×7.86mm, White)


Quick summary: When looked from above (face-up position), 3ct Diamond (13.05×7.86mm, pear cut) appears 64% larger than 1.66ct Spinel (10.19×6.14mm, pear cut). See below how they compare side-by-side on a ring and finger.

1.66ct Spinel (pear cut)
vs
 3ct Diamond (pear cut)
light violet
 
white
10.19×6.14 mm 13.05×7.86 mm
actual size
Actual size of 1.66ct Spinel (pear cut, 10.19×6.14mm, Light Violet color)   Actual size of 3ct Diamond (pear cut, 13.05×7.86mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Violet 1.66ct Spinel (pear cut, 10.19×6.14mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 3ct Diamond (pear cut, 13.05×7.86mm) 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
 37% vs 47%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.66ct Spinel Pear (10.19×6.14mm, Light Violet) and 3ct Diamond Pear (13.05×7.86mm, 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, Spinel will face-up slightly smaller than Diamond for a given carat weight, because it has higher specific gravity (3.6 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.


1.66 Ct Spinel (Pear) 3 Ct Diamond (Pear)
10.19×6.14 mm vs 13.05×7.86 mm
45.67 mm²   74.88 mm²
Face-up size outline for 3ct Diamond (13.05×7.86mm, pear cut)
Face-up size outline for 1.66ct Spinel (10.19×6.14mm, pear cut)
1.66ct Spinel Pear (10.19×6.14mm)
3ct Diamond Pear (13.05×7.86mm)
Difference: 64% (29.21 mm²)
3ct Diamond (Pear, 13.05×7.86mm) has approx. 64% more face-up area than 1.66ct Spinel (Pear, 10.19×6.14mm).


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