2.98 Carat Alexandrite Cushion (9.5×7.1mm, Dark Violet)
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64 mm
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Skin tone |
Light |
Ring diameter |
16.9 mm |
Ring width |
3.0 mm |
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64 mm |
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Ring diameter:
16.9 mm
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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 Class:
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Chrysoberyl |
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Shape:
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Cushion |
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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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3.7 |
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Carat weight:
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2.98 ct |
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Gram weight:
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0.6 g (0.021 ounces) |
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Points:
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298 pts |
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Length:
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9.5 mm |
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Width:
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7.1 mm |
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Est. face-up size:
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60.71 mm² |
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Volume:
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161.08 mm³ |
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Length-to-width ratio:
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1.34 |
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Refractive Index:
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1.744 - 1.755 |
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Cleavage:
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1,1 ; 3,2 |
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Luster:
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Vitreous |
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Birefringence:
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0.009 |
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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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Birthstone:
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Alexandrite is a birthstone for the month of June |
Popular comparisons:
- 2.98ct Alexandrite (Cushion, Dark Violet, 9.5 x 7.1) vs. 1.54ct Diamond (Oval, Bluish Green, 9.65 x 6.42)
- 2.98ct Alexandrite (Cushion, Dark Violet, 9.5 x 7.1) vs. 3.54ct Alexandrite (Cushion, Bluish Green, 10.1 x 7.5)
- 2.98ct Alexandrite (Cushion, Dark Violet, 9.5 x 7.1) vs. 2.9ct Sapphire (Cushion, Light Blue, 8.94 x 6.87)
- 2.98ct Alexandrite (Cushion, Dark Violet, 9.5 x 7.1) vs. 2.59ct Alexandrite (Round, Bluish Green, 8 x 8)
- 2.98ct Alexandrite (Cushion, Dark Violet, 9.5 x 7.1) vs. 5.14ct Diamond (Princess, White, 12.25 x 8.2)
- 2.98ct Alexandrite (Cushion, Dark Violet, 9.5 x 7.1) vs. 5.14ct Diamond (Princess, White, 8.2 x 12.25)
- 1ct Alexandrite (Cushion, Bluish Green, 5.74 x 5.74) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 3ct Alexandrite (Cushion, Bluish Green, 8.28 x 8.28) vs. 3ct Diamond (Round, White, 9.37 x 9.37)
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