15 Carat Amethyst (Round, 16.91mm, Violet)
Color:
Actual size is set for screen
How big is a 15 carat round-cut Amethyst?
It depends on the cut proportions, but typically a 15ct round-cut Amethyst would measure around 16.91 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 |
101 % |
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Saved...
|
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Ring diameter:
16.9 mm
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Additional Info
Amethyst is a purple variety of quartz and a very popular and affordable gem. Its name originates from the Greek word amethystos which means "not drunken". Ancient Greeks believed it could prevent intoxication. Amethyst is considered the most valuable of quartz gemstones.
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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Amethyst |
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Mineral Group:
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Quartz |
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Shape:
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Round |
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Chemical Formula:
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SiO2 |
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Crystal Structure:
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Hexagonal |
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Hardness:
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7 |
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Specific Gravity
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2.65 |
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Carat weight:
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15 ct |
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Gram weight:
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3 g (0.1058 ounces) |
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Points:
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1500 pts |
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Length:
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16.91 mm |
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Width:
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16.91 mm |
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Average diameter:
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16.91 mm |
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Est. face-up size:
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224.58 mm² |
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Volume:
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1132.08 mm³ |
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Length-to-width ratio:
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1 |
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Refractive Index:
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1.54 - 1.55 |
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Luster:
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Vitreous |
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Wearability:
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Very good |
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Care Instructions:
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No special or unusual care |
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Color:
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Amethyst can be found in the following colors:
    
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Birthstone:
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Amethyst is a birthstone for the month of February |
Popular comparisons:
- 15ct Amethyst (Round, Violet, 16.91 x 16.91) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 15ct Amethyst (Round, Violet, 16.91 x 16.91) vs. 1ct Emerald (Round, Green, 6.82 x 6.82)
- 15ct Amethyst (Round, Violet, 16.91 x 16.91) vs. 16ct Diamond (Round, White, 16.38 x 16.38)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04)
- 2ct Amethyst (Round, Violet, 8.64 x 8.64) vs. 2ct Amethyst (Oval, Violet, 10.94 x 7.29)
- 1ct Amethyst (Round, Violet, 6.86 x 6.86) vs. 1ct Tanzanite (Round, Blue, 6.37 x 6.37)
- 8ct Amethyst (Round, Violet, 13.72 x 13.72) vs. 8ct Emerald (Emerald, Green, 14.55 x 10.78)