0.75 Carat Alexandrite (Marquise, 9.04×4.52mm, Bluish Green)
Color:
Actual size is set for screen
How big is a 0.75 carat marquise-cut Alexandrite?
It depends on the cut parameters and length-to-width ratio, but a typical size of a 0.75ct marquise-cut Alexandrite would be around 9.04×4.52 mm (±6%). The lw ratio of this Alexandrite 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 |
27 % |
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Saved...
|
|
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Ring diameter:
16.9 mm
|
Additional Info
Named after Czar Alexander II (1818-1881) Alexandrite is a rare and valuable color-change variety of chrysoberyl. Alexandrite possesses a surprising ability to change color - from green or bluish-green in daylight, it transforms to purplish or raspberry red in incandescent light.
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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Alexandrite |
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Mineral Group:
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Chrysoberyl |
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Shape:
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Marquise |
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Chemical Formula:
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BeAl2O4 |
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Crystal Structure:
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Orthorhombic |
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Hardness:
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8.5 |
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Specific Gravity
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3.73 |
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Carat weight:
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0.75 ct |
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Gram weight:
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0.15 g (0.0053 ounces) |
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Points:
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75 pts |
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Length:
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9.04 mm |
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Width:
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4.52 mm |
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Est. face-up size:
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29.01 mm² |
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Volume:
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40.21 mm³ |
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Length-to-width ratio:
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2 |
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Refractive Index:
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1.744 - 1.755 |
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Luster:
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Vitreous |
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Wearability:
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Durable gem for daily wear |
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Care Instructions:
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No special or unusual care |
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Color:
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Alexandrite can be found in the following colors:
                  
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Birthstone:
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Alexandrite is a birthstone for the month of June |
Popular comparisons:
- 1ct Alexandrite (Marquise, Bluish Green, 10 x 5) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Alexandrite (Marquise, Bluish Green, 10.12 x 5.06) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 7ct Alexandrite (Marquise, Bluish Green, 19.38 x 9.69) vs. 2ct Alexandrite (Marquise, Bluish Green, 12.76 x 6.38)
- 1.5ct Alexandrite (Marquise, Bluish Green, 11.6 x 5.8) vs. 2ct Alexandrite (Marquise, Bluish Green, 12.76 x 6.38)
- 1ct Alexandrite (Marquise, Bluish Green, 10 x 5) vs. 1ct Alexandrite (Oval, Bluish Green, 8 x 6)
- 1ct Alexandrite (Marquise, Dark Bluish Green, 9.3 x 4.6) vs. 1ct Diamond (Marquise, White, 10.38 x 5.19)
- 0.24ct Alexandrite (Marquise, Bluish Green, 6.23 x 2.78) vs. 0.68ct Alexandrite (Oval, Bluish Green, 6.7 x 4.2)
- 0.75ct Alexandrite (Marquise, Purple, 9.2 x 4.6) vs. 2.5ct Diamond (Oval, White, 11.01 x 7.34)