40 Carat Diaspore (Oval, 27.68×18.45mm, Light Yellowish Green)
Color:
Actual size is set for screen
How big is a 40 carat oval-cut Diaspore?
It depends on the cut parameters and length-to-width ratio, but a typical size of a 40ct oval-cut Diaspore would be around 27.68×18.45 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:
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Ring width:
3.0 mm
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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 |
110 % |
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Saved...
|
|
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Ring diameter:
16.9 mm
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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
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Name:
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Diaspore |
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Shape:
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Oval |
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Chemical Formula:
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AlO(OH) |
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Crystal Structure:
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Orthorhombic |
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Hardness:
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6.5 - 7 |
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Specific Gravity
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3.4 |
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Carat weight:
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40 ct |
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Gram weight:
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8 g (0.2822 ounces) |
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Points:
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4000 pts |
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Length:
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27.68 mm |
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Width:
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18.45 mm |
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Est. face-up size:
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418.77 mm² |
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Volume:
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2352.94 mm³ |
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Length-to-width ratio:
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1.5 |
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Refractive Index:
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1.70 - 1.75 |
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Luster:
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Vitreous |
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Wearability:
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Good |
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Care Instructions:
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Relatively good hardness, but can be brittle |
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Color:
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Diaspore can be found in the following colors:
          
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Birthstone:
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Diaspore is not an official birthstone of any month |
Popular comparisons:
- 1ct Diaspore (Oval, Light Yellowish Green, 7.98 x 5.32) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1.8ct Diaspore (Oval, Light Purple, 9.5 x 6.5) vs. 2.3ct Diamond (Oval, White, 10 x 7.14)
- 1ct Diaspore (Oval, Light Yellowish Green, 7.98 x 5.32) vs. 1ct Alexandrite (Oval, Bluish Green, 7.77 x 5.18)
- 7ct Diaspore (Oval, Light Yellowish Green, 15.27 x 10.18) vs. 19ct Emerald (Emerald, Green, 19.43 x 14.39)
- 4.25ct Diaspore (Oval, Light Yellowish Green, 12.93 x 8.62) vs. 2.35ct Diaspore (Oval, Light Yellowish Green, 10.62 x 7.08)
- 0.75ct Diaspore (Oval, Light Yellowish Green, 7.26 x 4.84) vs. 0.5ct Diaspore (Oval, Light Yellowish Green, 6.33 x 4.22)
- 2.5ct Diaspore (Oval, Light Yellowish Green, 9.5 x 7.5) vs. 2.5ct Diamond (Oval, White, 9 x 7)
- 1.8ct Diaspore (Oval, Light Yellowish Green, 9.72 x 6.48) vs. 2.3ct Diamond (Oval, White, 10.71 x 7.14)