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1.75ct Kyanite (Baguette, 8.58×5.72mm, Blue) vs 1.75ct Topaz (Baguette, 8.7×5.8mm, Blue)


Quick summary: When looked from above (face-up position), 1.75ct Topaz (8.7×5.8mm, baguette cut) appears 3% larger than 1.75ct Kyanite (8.58×5.72mm, baguette cut). See below how they compare side-by-side on a ring and finger.

1.75ct Kyanite (baguette cut)
vs
 1.75ct Topaz (baguette cut)
blue
 
blue
8.58×5.72 mm 8.7×5.8 mm
actual size
Actual size of 1.75ct Kyanite (baguette cut, 8.58×5.72mm, Blue color)   Actual size of 1.75ct Topaz (baguette cut, 8.7×5.8mm, 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 (baguette cut, 8.58×5.72mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1.75ct Topaz (baguette cut, 8.7×5.8mm) 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
 34% vs 35%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.75ct Kyanite Baguette (8.58×5.72mm, Blue) and 1.75ct Topaz Baguette (8.7×5.8mm, 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 (Baguette) 1.75 Ct Topaz (Baguette)
8.58×5.72 mm vs 8.7×5.8 mm
49.08 mm²   50.46 mm²
Face-up size outline for 1.75ct Topaz (8.7×5.8mm, baguette cut)
Face-up size outline for 1.75ct Kyanite (8.58×5.72mm, baguette cut)
1.75ct Kyanite Baguette (8.58×5.72mm)
1.75ct Topaz Baguette (8.7×5.8mm)
Difference: 3% (1.38 mm²)
1.75ct Topaz (Baguette, 8.7×5.8mm) has approx. 3% more face-up area than 1.75ct Kyanite (Baguette, 8.58×5.72mm).


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