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Home Gemstones Round Blue Gems

Round Blue Gemstones

Explore natural round blue gemstones selected for jewelry design, collecting and replacement stones. Browse loose gems by size, color tone, clarity and gem type to find the right blue centerpiece or accent.

Round Blue Gems Weight
Round Blue Gems Size
Round Blue Gems Clarity
Round Blue Gems Price
Round Blue Gems Treatment

Size Explained

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For Example: 6-7
For Example: 8-9
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Blue Round Blue Gems
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0.82ct Blue Kyanite, Round, SI

5.2 mm

$ 24.96

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0.38ct Blue Kyanite, Round, VS-SI

4 mm (calibrated)

$ 9.46

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1.99ctw Blue Zircon, Round, VVS

4.5 mm (calibrated)

$ 26.16

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0.03ct Blue Diamond, Round, VS

2.3 mm (calibrated)

$ 33.53

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5.70ctw Blue Topaz, Round, VVS-VS

9 mm (calibrated)

$ 39.90

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13.19ct Blue Color-Change Fluorite, Round, VS

15 mm (calibrated)

$ 361.28

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0.39ct Blue Kyanite, Round, SI

4.3 mm

$ 9.71

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6.37ctw Blue Topaz, Round, VVS-VS

9 mm (calibrated)

$ 44.59

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1.19ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 29.63

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0.53ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 13.20

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0.71ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 17.68

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0.60ct Blue Sapphire, Round, VVS-VS

5 mm (calibrated)

$ 404.19

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1.09ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 27.14

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0.38ctw Blue Apatite, Round, VS-SI

3.5 mm (calibrated)

$ 8.11

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0.07ct Blue Diamond, Round, VS-SI

2.3 mm (calibrated)

$ 58.10

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0.67ctw Blue Kyanite, Round, VS-SI

4 mm (calibrated)

$ 16.68

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0.44ct Blue Kyanite, Round, SI

4.3 mm

$ 10.96

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0.06ct Blue Diamond, Round, VVS-VS

2.4 mm (calibrated)

$ 77.69

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0.58ct Blue Sapphire, Round, VVS

5 mm (calibrated)

$ 390.71

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4.30ctw Blue Topaz, Round, VVS-VS

8 mm (calibrated)

$ 29.98

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1.59ctw Blue Kyanite, Round, VS-SI

5.2 mm

$ 31.67

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1.01ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 27.39

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0.70ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 17.43

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0.31ct Blue Aquamarine, Round, VS-SI

4.5 mm (calibrated)

$ 43.23

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Why Buy Round Blue Gems from GemSelect?

Shop Loose Round Blue Gems

Round blue gemstones are a versatile choice for many jewelry styles, from classic solitaire rings to matched earrings, pendants and accent stone layouts. The round shape is popular because it works well in standard settings and presents color evenly across the face of the gem.

Choose the Right Shade of Blue

Blue gemstones can range from pale sky blue and bright teal-blue to deep navy and violet-blue tones. When comparing stones, consider whether you want a light, lively look or a richer, more saturated color. Photos, measurements and gem details can help you compare options before choosing a loose stone.

Popular Gem Types in Round Blue Stones

This category may include a variety of natural blue gem species such as sapphire, topaz, spinel, zircon, aquamarine, apatite, tourmaline, kyanite and other blue stones when available. Each gem type has its own color range, brilliance, durability and character, so the best choice depends on the jewelry design and how the piece will be worn.

Selection of loose round blue gemstones in different shades

Round Blue Gemstones for Jewelry Design

Round blue gems are especially useful for designers because they can be set alone or combined with diamonds, white gemstones, other blues or contrasting colors. Smaller round stones are often used for side stones, halo designs and earrings, while larger rounds can become the main feature in a custom ring or pendant.

What to Compare Before Buying

Before selecting a gemstone, review the millimeter size, carat weight, color, clarity, cut style and any listed treatment information. For calibrated settings, millimeter dimensions are often more important than carat weight because different gem materials can have different densities and depths.

Round Blue Gemstone FAQs

What types of gemstones are available in round blue colors?

Common round blue gemstones can include sapphire, blue topaz, aquamarine, spinel, zircon, apatite, kyanite and tourmaline, depending on current availability. Each type offers a different balance of color, brilliance, hardness and price range.

Are round blue gemstones good for rings?

Many round blue gems can be used in rings, but suitability depends on the gem species and the intended wear. Harder stones are generally better for everyday rings, while more delicate gems may be better suited to occasional wear or protected settings.

Should I choose by carat weight or millimeter size?

For jewelry settings, millimeter size is usually the most important measurement because it determines fit. Carat weight is useful for comparison, but two gemstones of the same carat weight may have different face-up sizes depending on material and cut depth.

Can I match two round blue gemstones for earrings?

Yes, round blue gemstones are a popular choice for earrings. For the best match, compare diameter, color tone, saturation, clarity and cutting style, or look for stones listed as pairs when available.

What makes round blue gemstones so popular?

The round shape is timeless, easy to design around and often available in many sizes. Combined with blue’s broad appeal, round blue gems are practical for both traditional and modern jewelry designs.

GemSelect Certified Store Reviews

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

Overall Rating -> 10 star ratings

Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.

Posted By Ktreva52 in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate
Enlarged Gemstone Image