18 Carat Diaspore (Cabochon, 18.93×12.62mm, Light Yellowish Green)
Color:
Actual size is set for screen
How big is an 18 carat cabochon-cut Diaspore?
It depends on the cut parameters and length-to-width ratio, but a typical size of an 18ct cabochon-cut Diaspore would be around 18.93×12.62 mm (±6%). The lw ratio of this Diaspore is 1.5. See below how big it looks on a ring and finger.
Ring:
Skin tone:
|
Ring width:
3.0 mm
|
Saved...
64 mm
| Your settings | |
|---|---|
Ring |
Gold |
Skin tone |
Light |
Ring diameter |
16.9 mm |
Ring width |
3.0 mm |
Finger length |
64 mm |
Finger coverage |
75 % |
|
Saved...
|
|
|
Ring diameter:
16.9 mm
|
Additional Info
Diaspore is quite rare color-changing gemstone mined only in the remote location in Turkey's Anatolian Mountains. It appears yellowish-green to light green in daylight, changing to pinkish hues in incandescent lighting.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Gem Details
|
Name:
|
Diaspore |
|
Shape:
|
Cabochon |
|
Chemical Formula:
|
AlO(OH) |
|
Crystal Structure:
|
Orthorhombic |
|
Hardness:
|
6.5 - 7 |
|
Specific Gravity
|
3.4 |
|
Carat weight:
|
18 ct |
|
Gram weight:
|
3.6 g (0.127 ounces) |
|
Points:
|
1800 pts |
|
Length:
|
18.93 mm |
|
Width:
|
12.62 mm |
|
Est. face-up size:
|
195.9 mm² |
|
Volume:
|
1058.82 mm³ |
|
Length-to-width ratio:
|
1.5 |
|
Refractive Index:
|
1.70 - 1.75 |
|
Luster:
|
Vitreous |
|
Wearability:
|
Good |
|
Care Instructions:
|
Relatively good hardness, but can be brittle |
|
Color:
|
Diaspore can be found in the following colors:
          
|
|
Birthstone:
|
Diaspore is not an official birthstone of any month |
Popular comparisons:
- 34ct Diaspore (Cabochon, Light Yellowish Green, 23.4 x 15.6) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 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)
- 1ct Alexandrite (Round, Bluish Green, 6.14 x 6.14) vs. 1ct Emerald (Emerald, Yellowish Green, 7.28 x 5.39)