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1.75ct Kyanite (Pear, 10.54×6.35mm, Blue) vs 1.75ct Topaz (Pear, 10.69×6.44mm, Blue)


Quick summary: When looked from above (face-up position), 1.75ct Topaz (10.69×6.44mm, pear cut) appears 3% larger than 1.75ct Kyanite (10.54×6.35mm, pear cut). See below how they compare side-by-side on a ring and finger.

1.75ct Kyanite (pear cut)
vs
 1.75ct Topaz (pear cut)
blue
 
blue
10.54×6.35 mm 10.69×6.44 mm
actual size
Actual size of 1.75ct Kyanite (pear cut, 10.54×6.35mm, Blue color)   Actual size of 1.75ct Topaz (pear cut, 10.69×6.44mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1.75ct Kyanite (pear cut, 10.54×6.35mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1.75ct Topaz (pear cut, 10.69×6.44mm) 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
 38% vs 39%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.75ct Kyanite Pear (10.54×6.35mm, Blue) and 1.75ct Topaz Pear (10.69×6.44mm, 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, Kyanite will face-up smaller than Topaz for a given carat weight, because it has higher specific gravity (3.68 vs. 3.53 - this means it's "heavier" compared to Topaz 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.


1.75 Ct Kyanite (Pear) 1.75 Ct Topaz (Pear)
10.54×6.35 mm vs 10.69×6.44 mm
48.86 mm²   50.26 mm²
Face-up size outline for 1.75ct Topaz (10.69×6.44mm, pear cut)
Face-up size outline for 1.75ct Kyanite (10.54×6.35mm, pear cut)
1.75ct Kyanite Pear (10.54×6.35mm)
1.75ct Topaz Pear (10.69×6.44mm)
Difference: 3% (1.4 mm²)
1.75ct Topaz (Pear, 10.69×6.44mm) has approx. 3% more face-up area than 1.75ct Kyanite (Pear, 10.54×6.35mm).


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