2.56 Carat Sapphire Round (7.78×7.78mm, Blue)
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64 mm
| Your settings | |
|---|---|
Ring |
Gold |
Skin tone |
Light |
Ring diameter |
16.9 mm |
Ring width |
3.0 mm |
Finger length |
64 mm |
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Saved...
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Ring diameter:
16.9 mm
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Additional Info
Sapphire got its name from the Greek word "sappheiros", which means "blue stone". Today, most people still associate Sapphires with the color blue, however, any gemstone quality Corundum that is not red (Ruby) is actually called Sapphire.
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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Sapphire |
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Mineral Class:
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Corundum |
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Shape:
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Round |
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Chemical Formula:
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Al2O3 |
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Crystal Structure:
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Hexagonal |
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Hardness:
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9 |
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Specific Gravity
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4 |
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Carat weight:
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2.56 ct |
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Gram weight:
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0.51 g (0.0181 ounces) |
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Points:
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256 pts |
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Length:
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7.78 mm |
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Width:
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7.78 mm |
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Average diameter:
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7.78 mm |
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Est. face-up size:
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47.54 mm² |
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Volume:
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128 mm³ |
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Length-to-width ratio:
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1 |
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Refractive Index:
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1.76 - 1.77 |
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Cleavage:
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None |
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Luster:
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Vitreous to adamantine |
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Birefringence:
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0.0008 |
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Wearability:
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Excellent |
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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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Sapphire is a birthstone for the month of September |
Popular comparisons:
- 2.56ct Sapphire (Round, Blue, 7.78 x 7.78) vs. 1ct Sapphire (Round, Blue, 6.5 x 6.5)
- 1ct Sapphire (Round, Blue, 5.98 x 5.98) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2ct Sapphire (Round, Blue, 7.53 x 7.53) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 1ct Sapphire (Round, Blue, 6.5 x 6.5) vs. 1ct Sapphire (Cushion, Blue, 6 x 6)
- 5.55ct Sapphire (Round, Blue, 10.58 x 10.58) vs. 9ct Sapphire (Cushion, Blue, 11.63 x 11.63)
- 1ct Sapphire (Round, Blue, 5.98 x 5.98) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 0.3ct Sapphire (Round, Yellow, 4 x 4) vs. 0.2ct Sapphire (Round, Blue, 3.5 x 3.5)
- 0.14ct Sapphire (Round, Blue, 3.1 x 3.1) vs. 0.1ct Diamond (Round, White, 3.02 x 3.02)
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