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2.5 Carat Ruby (Round, 8.11mm, Red)

Color:
red
actual size
2.5ct Ruby displayed at actual size of 8.11×8.11mm, (Round cut, Red
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Actual size is set for screen


How big is a 2.5 carat round-cut Ruby?

It depends on the cut proportions, but typically a 2.5ct round-cut Ruby would measure around 8.11 mm (±4%) in diameter. You can check the finger coverage in the simulator below. 
Ring:
Skin tone:
Ring width: 3.0 mm
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Finger image
Ring on finger
Red 2.5ct Ruby (round cut) shown in real-world size of 8.11×8.11mm on a ring and finger
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
 48 %
Saved...
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

Name:
Ruby
Mineral Group:
Corundum
Shape:
Round
Chemical Formula:
Al2O3
Crystal Structure:
Hexagonal
Hardness:
9
Specific Gravity
4
Carat weight:
2.5 ct
Gram weight:
0.5 g (0.0176 ounces)
Points:
250 pts
Length:
8.11 mm
Width:
8.11 mm
Average diameter:
8.11 mm
Est. face-up size:
51.66 mm²
Volume:
125 mm³
Length-to-width ratio:
1
Refractive Index:
1.76 - 1.77
Luster:
Vitreous to adamantine
Wearability:
Excellent
Care Instructions:
No special or unusual care
Color:
Ruby can be found in the following colors:
Color Light RedColor RedColor Dark Red
Birthstone:
Ruby is a birthstone for the month of July

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