2.5 Carat Apatite (Round, 8.74mm, Green)

Color:

green

actual size

Actual size is set for screen

How big is a 2.5 carat round-cut Apatite?

It depends on the cut proportions, but typically a 2.5ct round-cut Apatite would measure around 8.74 mm (±4%) in diameter. You can check the finger coverage in the simulator below.

Ring:

Gold
Platinum

Skin tone:

Pale
Light
Medium
Dark

Ring width: 3.0 mm

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	52 %

Saved...

Ring diameter: 16.9 mm

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Additional Info

Apatite can appear in wide variety of colors, which is why it’s often mistaken for other gems. This characteristic actually gave it the name - from the Greek word apatao, which means "to deceive".

Where to buy?

For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Gem Details

Name:	Apatite
Shape:	Round
Chemical Formula:	Ca₅(PO₄)₃(F,OH,Cl)
Crystal Structure:	Hexagonal
Hardness:	5
Specific Gravity	3.2
Carat weight:	2.5 ct
Gram weight:	0.5 g (0.0176 ounces)
Points:	250 pts
Length:	8.74 mm
Width:	8.74 mm
Average diameter:	8.74 mm
Est. face-up size:	59.99 mm²
Volume:	156.25 mm³
Length-to-width ratio:	1
Refractive Index:	1.628 - 1.651
Luster:	Vitreous
Wearability:	Good
Care Instructions:	It's quite soft so care should be taken when storing it with jewelry that could scratch its surface
Color:	Apatite can be found in the following colors:
Birthstone:	Apatite is not an official birthstone of any month

Popular comparisons:

About Apatite Specific Gravity

Apatite has a specific gravity of approximately 3.15 - 3.23, with 3.2 being a generally accepted standard average for gem-quality material.

For all the Apatite size calculations on this website, the specific gravity of 3.2 is used.

To learn more about it and why it matters, and to compare densities of all the gemstones on one page, click here.

Ring & Finger Simulator

Use the simulator on this page to play around with different ring and finger configurations.

To select a different gemstone, shape, color or size, or to compare two gems side-by-side, use the form at the top of the page. Comparison example: 2.5ct Apatite vs Aquamarine

If you want to compare round-cut Apatite sizes from 0.25 to 40ct on one page, see Apatite Size Chart

In order to view real-world sizes on your screen, ensure that the actual size is set to your device screen size (diagonal in inches).