7 Carat Ruby (Emerald, 12.22×9.05mm, Red)
Color:
Actual size is set for screen
How big is a 7 carat emerald-cut Ruby?
It depends on the cut parameters and length-to-width ratio, but a typical size of a 7ct emerald-cut Ruby would be around 12.22×9.05 mm (±6%). The lw ratio of this Ruby is 1.35. 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 |
54 % |
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Saved...
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Ring diameter:
16.9 mm
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Additional Info
Ruby is a red to pink variety of the mineral Corundum. Its name comes from the Latin word "ruber", which simply means "red". Most Rubies on the market are heat-treated to enhance their color and clarity.
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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Ruby |
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Mineral Group:
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Corundum |
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Shape:
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Emerald |
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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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7 ct |
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Gram weight:
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1.4 g (0.0494 ounces) |
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Points:
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700 pts |
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Length:
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12.22 mm |
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Width:
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9.05 mm |
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Est. face-up size:
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102.85 mm² |
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Volume:
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350 mm³ |
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Length-to-width ratio:
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1.35 |
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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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Ruby can be found in the following colors:
 
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Birthstone:
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Ruby is a birthstone for the month of July |