20 Carat Sapphire (Round, 16.23mm, Blue)
Color:
Actual size is set for screen
How big is a 20 carat round-cut Sapphire?
It depends on the cut proportions, but typically a 20ct round-cut Sapphire would measure around 16.23 mm (±4%) in diameter. You can check the finger coverage in the simulator below.
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 |
97 % |
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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 Group:
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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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20 ct |
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Gram weight:
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4 g (0.1411 ounces) |
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Points:
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2000 pts |
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Length:
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16.23 mm |
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Width:
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16.23 mm |
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Average diameter:
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16.23 mm |
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Est. face-up size:
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206.88 mm² |
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Volume:
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1000 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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Luster:
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Vitreous to adamantine |
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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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Sapphire can be found in the following colors:
                           
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Birthstone:
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Sapphire is a birthstone for the month of September |
Popular comparisons:
- 20ct Sapphire (Round, Blue, 16.23 x 16.23) vs. 9ct Emerald (Round, Green, 14.18 x 14.18)
- 20ct Sapphire (Round, Blue, 16.23 x 16.23) vs. 8ct Diamond (Emerald, White, 13.37 x 9.9)
- 20ct Sapphire (Round, Blue, 16.23 x 16.23) vs. 10ct Emerald (Marquise, Green, 24.24 x 12.12)
- 20ct Sapphire (Round, Blue, 16.23 x 16.23) vs. 7ct Emerald (Round, Green, 13.04 x 13.04)
- 20ct Sapphire (Round, Blue, 16.23 x 16.23) vs. 5ct Emerald (Round, Green, 11.65 x 11.65)
- 20ct Sapphire (Round, Blue, 16.23 x 16.23) vs. 3ct Ruby (Round, Red, 8.62 x 8.62)
- 20ct Sapphire (Round, Blue, 16.23 x 16.23) vs. 6ct Sapphire (Round, Blue, 10.86 x 10.86)
- 20ct Sapphire (Round, Blue, 16.23 x 16.23) vs. 1.2ct Diamond (Round, White, 6.91 x 6.91)
Use the simulator on this page to play around with different ring and finger configurations.