1ct Diaspore (Marquise, 10.42×5.21mm, Light Yellowish Green) vs 1ct Alexandrite (Oval, 7.77×5.18mm, Bluish Green)
Quick summary: When looked from above (face-up position), 1ct Diaspore (10.42×5.21mm, marquise cut) appears 17% larger than 1ct Alexandrite (7.77×5.18mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 1ct Diaspore (marquise cut) |
vs
|
1ct Alexandrite (oval cut) |
|
light yellowish green |
|
|
| 10.42×5.21 mm | 7.77×5.18 mm | |
| actual size | ||
|
|
|
Actual size is set for screen
|
Ring:
Skin tone:
Ring width: 3.0 mm
|
|
64 mm |
|
|
|||||||||||||||||
|
|||||||||||||||||||||
Actual sizes of
1ct Diaspore Marquise (10.42×5.21mm, Light Yellowish Green)
and
1ct Alexandrite Oval (7.77×5.18mm, Bluish Green)
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 Diaspore for a given
carat weight, because it has higher specific gravity
(3.73 vs. 3.4 - this means it's "heavier" compared to Diaspore 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.
| 1 Ct Diaspore (Marquise) | 1 Ct Alexandrite (Oval) | |
| 10.42×5.21 mm | vs | 7.77×5.18 mm |
| 38.54 mm² | 33 mm² |
| 1ct Diaspore Marquise (10.42×5.21mm) | |
| 1ct Alexandrite Oval (7.77×5.18mm) | |
| Difference: 17% (5.54 mm²) |
1ct Diaspore (Marquise, 10.42×5.21mm) has approx. 17% more face-up area than 1ct Alexandrite (Oval, 7.77×5.18mm).
Popular comparisons:
- 1ct Diaspore (Marquise, Light Yellowish Green, 10.42 x 5.21) vs. 1ct Alexandrite (Emerald, Bluish Green, 6.55 x 4.85)
- 1ct Diaspore (Marquise, Dark Red, 10.42 x 5.21) vs. 1ct Diopside (Marquise, Black, 10.52 x 5.26)
- 2.7ct Ruby (Pear, Red, 10 x 7) vs. 3ct Ruby (Emerald, Red, 9 x 7)
- 1.5ct Tourmaline (Round, Light Red, 7.45 x 7.45) vs. 1.5ct Sapphire (Round, Light Blue, 6.84 x 6.84)
- 1ct Kyanite (Oval, Blue, 7.77 x 5.18) vs. 1ct Tanzanite (Oval, Blue, 8.07 x 5.38)
- 1ct Aquamarine (Oval, Light Blue, 8 x 6) vs. 1ct Spinel (Oval, Gray, 8 x 6)
- 1.16ct Diamond (Round, White, 6.82 x 6.85) vs. 1.2ct Diamond (Round, White, 6.82 x 6.86)
- 6ct Morganite (Cushion, Light Red, 12 x 10) vs. 3.5ct Sapphire (Cushion, Blue, 8.49 x 8.49)