0.25 Carat Peridot (Round, 4mm, Yellowish Green)

Color:

yellowish green

actual size

Actual size is set for screen

How big is a 0.25 carat round-cut Peridot?

It depends on the cut proportions, but typically a 0.25ct round-cut Peridot would measure around 4 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	24 %

Saved...

Ring diameter: 16.9 mm

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Additional Info

Peridot is quite an affordable gem, found naturally in yellowish-green or olive-green color. Ancient Egyptians called it "the gem of the sun". Dark olive-green gems are the most valued.

Where to buy?

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

Gem Details

Name:	Peridot
Mineral Group:	Olivine
Shape:	Round
Chemical Formula:	(Mg,Fe)₂SiO₄
Crystal Structure:	Orthorhombic
Hardness:	6.5
Specific Gravity	3.34
Carat weight:	0.25 ct
Gram weight:	0.05 g (0.0018 ounces)
Points:	25 pts
Length:	4 mm
Width:	4 mm
Average diameter:	4 mm
Est. face-up size:	12.57 mm²
Volume:	14.97 mm³
Length-to-width ratio:	1
Refractive Index:	1.65 - 1.69
Luster:	Vitreous
Wearability:	Very good
Care Instructions:	Should be worn gently
Color:	Peridot can be found in the following colors:
Birthstone:	Peridot is a birthstone for the month of August

Popular comparisons:

About Peridot Specific Gravity

Peridot has a specific gravity of approximately 3.32 - 3.37, with 3.34 being a generally accepted standard average for gem-quality material.

For all the Peridot size calculations on this website, the specific gravity of 3.34 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: 0.25ct Peridot vs Sinhalite

If you want to compare round-cut Peridot sizes from 0.25 to 40ct on one page, see Peridot 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).