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14ct Alexandrite (Cabochon, 16.89×11.26mm, Bluish Green) vs 14ct Topaz (Cabochon, 17.19×11.46mm, Blue)


Quick summary: When looked from above (face-up position), 14ct Topaz (17.19×11.46mm, cabochon cut) appears 4% larger than 14ct Alexandrite (16.89×11.26mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

14ct Alexandrite (cabochon cut)
vs
 14ct Topaz (cabochon cut)
bluish green
 
blue
16.89×11.26 mm 17.19×11.46 mm
actual size
Actual size of 14ct Alexandrite (cabochon cut, 16.89×11.26mm, Bluish Green color)   Actual size of 14ct Topaz (cabochon cut, 17.19×11.46mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Bluish Green 14ct Alexandrite (cabochon cut, 16.89×11.26mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 14ct Topaz (cabochon cut, 17.19×11.46mm) 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
 67% vs 68%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 14ct Alexandrite Cabochon (16.89×11.26mm, Bluish Green) and 14ct Topaz Cabochon (17.19×11.46mm, 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, Alexandrite will face-up smaller than Topaz for a given carat weight, because it has higher specific gravity (3.73 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.


14 Ct Alexandrite (Cabochon) 14 Ct Topaz (Cabochon)
16.89×11.26 mm vs 17.19×11.46 mm
155.95 mm²   161.54 mm²
Face-up size outline for 14ct Topaz (17.19×11.46mm, cabochon cut)
Face-up size outline for 14ct Alexandrite (16.89×11.26mm, cabochon cut)
14ct Alexandrite Cabochon (16.89×11.26mm)
14ct Topaz Cabochon (17.19×11.46mm)
Difference: 4% (5.59 mm²)
14ct Topaz (Cabochon, 17.19×11.46mm) has approx. 4% more face-up area than 14ct Alexandrite (Cabochon, 16.89×11.26mm).


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