28 Carat Diaspore (Marquise, 31.16×15.58mm, Light Yellowish Green)
Color:
Actual size is set for screen
How big is a 28 carat marquise-cut Diaspore?
It depends on the cut parameters and length-to-width ratio, but a typical size of a 28ct marquise-cut Diaspore would be around 31.16×15.58 mm (±6%). The lw ratio of this Diaspore is 2. 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 |
93 % |
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Saved...
|
|
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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
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Name:
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Diaspore |
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Shape:
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Marquise |
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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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28 ct |
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Gram weight:
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5.6 g (0.1975 ounces) |
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Points:
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2800 pts |
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Length:
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31.16 mm |
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Width:
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15.58 mm |
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Est. face-up size:
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344.69 mm² |
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Volume:
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1647.06 mm³ |
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Length-to-width ratio:
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2 |
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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 (Marquise, Light Yellowish Green, 10.42 x 5.21) vs. 1ct Alexandrite (Emerald, Bluish Green, 6.55 x 4.85)
- 1ct Diaspore (Marquise, Light Yellowish Green, 10.42 x 5.21) vs. 1ct Alexandrite (Oval, Bluish Green, 7.77 x 5.18)
- 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)
- 6ct Morganite (Cushion, Light Red, 12 x 10) vs. 3.5ct Sapphire (Cushion, Blue, 8.49 x 8.49)