What is a 2.5 mm round sapphire?

A 2.5 mm round sapphire is a small, precisely cut gemstone with a round shape and a diameter of 2.5 mm. It is commonly used in fine jewelry, including rings, earrings, and bracelets. Sapphires in this size are available in various colors, such as blue sapphire, pink sapphire, yellow sapphire, white sapphire, and green sapphire.

Are 2.5 mm round sapphires natural or treated?

Sapphires can be either natural or treated. A natural 2.5 mm round sapphire is mined directly from the earth, while a heat-treated sapphire undergoes a process to enhance its color and clarity. Some options, like an untreated 2.5 mm round sapphire, remain completely natural without any enhancements.

What colors are available for 2.5 mm round sapphires?

There are many color variations, including blue sapphire, pink sapphire, yellow sapphire, white sapphire, and green sapphire. One of the rarest varieties is the round Padparadscha sapphire, which features a unique pink-orange hue.

How can I use a 2.5 mm sapphire in jewelry?

A 2.5 mm sapphire is perfect for various jewelry designs, including engagement rings, wedding bands, stud earrings, and bracelets. The round sapphire shape provides excellent brilliance and works well in solitaire and multi-stone settings.

What is the difference between a round sapphire and other shapes?

A round sapphire is cut to maximize sparkle and light reflection, making it a popular choice for fine jewelry. Other shapes, such as oval sapphire or cushion sapphire, offer different aesthetic appeals but may not reflect light as evenly as a round 2.5 mm sapphire.

How do I choose between a heat-treated and an untreated 2.5 mm sapphire?

A heat-treated sapphire has undergone a controlled heating process to improve its color and clarity, making it more vibrant and visually appealing. An untreated 2.5 mm round sapphire is completely natural, with its original characteristics preserved. The choice depends on personal preference and budget.

Is a 2.5 mm round sapphire durable?

Yes, sapphires are among the hardest gemstones, second only to diamonds. A 2.5 mm round sapphire is highly durable, making it suitable for everyday wear in rings, earrings, and bracelets without worrying about scratches or damage.

2.5 mm Round Sapphires: Blue, Pink, Yellow, White Round Gems, Wholesale 2.5 mm Round Sapphire

2.5 mm Round Sapphire Weight

2.5 mm Round Sapphire Size

2.5 mm Round Sapphire Clarity

2.5 mm Round Sapphire Price

2.5 mm Round Sapphire Treatment

Size Explained

Choose Size or Size Range

For Example: 6-7

For Example: 8-9

All

None

Heated

Be-Heated

Bi-color

Black

Blue

Brown

Golden

Gray

Green

Multicolor 2.5 mm Round Sapphire

Orange

Pink 2.5 mm Round Sapphire

Purple 2.5 mm Round Sapphire

Red

Turquoise

Violet

White

Yellow

Single

Pairs

Lots

Faceted

Cabochons

Clear All

5.57ctw Multicolor Sapphire, Round, VS

2.6 mm (calibrated)

$ 492.41

View Gem

0.10ct Purple Sapphire, Round, Transparent

2.5 mm (calibrated)

$ 1.74

View Gem

5.57ctw Multicolor Sapphire, Round, VS

2.6 mm (calibrated)

$ 492.41

View Gem

5.06ctw Multicolor Sapphire, Round, VS

2.6 mm (calibrated)

$ 447.34

View Gem

5.43ctw Multicolor Sapphire, Round, VS

2.5 mm (calibrated)

$ 480.04

View Gem

5.47ctw Multicolor Sapphire, Round, VS

2.5 mm (calibrated)

$ 483.57

View Gem

0.09ct Pink Sapphire, Round, Transparent

2.5 mm (calibrated)

$ 1.74

View Gem

5.27ctw Multicolor Sapphire, Round, VS

2.5 mm (calibrated)

$ 465.90

View Gem

Why Buy 2.5 Mm Round Sapphire from GemSelect?

Trusted Worldwide Since 2003
Supplying natural gemstones to jewelers and collectors in 120+ countries
Verified natural gemstones
View All GemSelect Reviews on Bizrate
Secure checkout and insured worldwide delivery
30-day returns and satisfaction guarantee

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025

Source: Bizrate

Overall Rating -> 10

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025

Source: Bizrate

Overall Rating -> 10

It was all good

Posted By Debsarabs in February, 2026

Source: Bizrate

Overall Rating -> 10

Easy and good price

Posted By Bry_guy in March, 2026

Source: Bizrate

Overall Rating -> 10

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025

Source: Bizrate

Overall Rating -> 10

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026

Source: Bizrate

→ View All GemSelect Reviews on Bizrate