6.5 Carat Alexandrite (Cabochon, 13.08×8.72mm, Bluish Green)
Color:
Actual size is set for screen
How big is a 6.5 carat cabochon-cut Alexandrite?
It depends on the cut parameters and length-to-width ratio, but a typical size of a 6.5ct cabochon-cut Alexandrite would be around 13.08×8.72 mm (±6%). The lw ratio of this Alexandrite 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 |
52 % |
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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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Cabochon |
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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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6.5 ct |
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Gram weight:
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1.3 g (0.0459 ounces) |
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Points:
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650 pts |
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Length:
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13.08 mm |
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Width:
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8.72 mm |
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Est. face-up size:
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93.53 mm² |
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Volume:
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348.53 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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1.744 - 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 (Cabochon, Dark Purple, 7.02 x 4.68) vs. 1ct Alexandrite (Trillion, Bluish Green, 7.21 x 7.21)
- 1ct Alexandrite (Cabochon, Bluish Green, 7.02 x 4.68) vs. 1ct Emerald (Cabochon, Green, 7.8 x 5.2)
- 1ct Alexandrite (Cabochon, Bluish Green, 7.02 x 4.68) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 12ct Alexandrite (Cabochon, Bluish Green, 16.08 x 10.72) vs. 1ct Alexandrite (Emerald, Bluish Green, 6.55 x 4.85)
- 1ct Alexandrite (Cabochon, Bluish Green, 7.02 x 4.68) vs. 1ct Diamond (Cabochon, White, 7.14 x 4.76)
- 12ct Alexandrite (Cabochon, Light Bluish Green, 14 x 11) vs. 4ct Sapphire (Oval, Dark Blue, 11 x 9)
- 3.24ct Alexandrite (Cabochon, Bluish Green, 10.4 x 6.93) vs. 3.24ct Tanzanite (Oval, Blue, 11.94 x 7.96)
- 3.24ct Alexandrite (Cabochon, Bluish Green, 10.4 x 6.93) vs. 3.24ct Amethyst (Cabochon, Dark Violet, 11.61 x 7.74)