7ct Alexandrite (Cabochon, 13.4×8.93mm, Bluish Green) vs 7ct Sapphire (Cabochon, 13.1×8.73mm, Blue)
Quick summary: When looked from above (face-up position), 7ct Alexandrite (13.4×8.93mm, cabochon cut) appears 5% larger than 7ct Sapphire (13.1×8.73mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 7ct Alexandrite (cabochon cut) |
vs
|
7ct Sapphire (cabochon cut) |
|
bluish green |
|
|
| 13.4×8.93 mm | 13.1×8.73 mm | |
| actual size | ||
|
|
|
|
|
||
Actual size is set for screen
|
Ring:
Skin tone:
Ring width: 3.0 mm
|
|
64 mm |
|
|
|||||||||||||||||
|
|||||||||||||||||||||
Actual sizes of
7ct Alexandrite Cabochon (13.4×8.93mm, Bluish Green)
and
7ct Sapphire Cabochon (13.1×8.73mm, 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, Sapphire will face-up smaller than Alexandrite for a given
carat weight, because it has higher specific gravity
(4 vs. 3.73 - this means it's "heavier" compared to Alexandrite 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.
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.
| 7 Ct Alexandrite (Cabochon) | 7 Ct Sapphire (Cabochon) | |
| 13.4×8.93 mm | vs | 13.1×8.73 mm |
| 98.12 mm² | 93.78 mm² |
| 7ct Alexandrite Cabochon (13.4×8.93mm) | |
| 7ct Sapphire Cabochon (13.1×8.73mm) | |
| Difference: 5% (4.34 mm²) |
7ct Alexandrite (Cabochon, 13.4×8.93mm) has approx. 5% more face-up area than 7ct Sapphire (Cabochon, 13.1×8.73mm).
Popular comparisons:
- 1ct Alexandrite (Cabochon, Dark Purple, 7.02 x 4.68) vs. 1ct Alexandrite (Trillion, Bluish Green, 7.21 x 7.21)
- 1ct Alexandrite (Cabochon, Bluish Green, 7.02 x 4.68) vs. 1ct Emerald (Cabochon, Green, 7.8 x 5.2)
- 1ct Alexandrite (Cabochon, Bluish Green, 7.02 x 4.68) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 12ct Alexandrite (Cabochon, Bluish Green, 16.08 x 10.72) vs. 1ct Alexandrite (Emerald, Bluish Green, 6.55 x 4.85)
- 1ct Alexandrite (Cabochon, Bluish Green, 7.02 x 4.68) vs. 1ct Diamond (Cabochon, White, 7.14 x 4.76)
- 12ct Alexandrite (Cabochon, Light Bluish Green, 14 x 11) vs. 4ct Sapphire (Oval, Dark Blue, 11 x 9)
- 3.24ct Alexandrite (Cabochon, Bluish Green, 10.4 x 6.93) vs. 3.24ct Tanzanite (Oval, Blue, 11.94 x 7.96)
- 3.24ct Alexandrite (Cabochon, Bluish Green, 10.4 x 6.93) vs. 3.24ct Amethyst (Cabochon, Dark Violet, 11.61 x 7.74)
- 1ct Alexandrite (Cabochon, Bluish Green, 7 x 5) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)