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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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1.27ctw Blue Kyanite, Round, SI

5.2 mm

$ 31.62

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6.24ctw Blue Topaz, Round, VVS

9 mm (calibrated)

$ 43.68

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0.52ct Blue Kyanite, Round, SI

4.3 mm

$ 12.95

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0.06ct Blue Diamond, Round, VS-SI

2.4 mm (calibrated)

$ 59.76

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12.25ct Blue Color-Change Fluorite, Round, VS

14 mm (calibrated)

$ 335.54

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4.58ctw Blue Topaz, Round, VVS-VS

8 mm (calibrated)

$ 35.13

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0.07ct Blue Diamond, Round, VS-SI

2.3 mm (calibrated)

$ 58.10

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1.39ct Blue Tanzanite, Round, Transparent

7 mm (calibrated)

$ 11.07

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4.57ctw Blue Topaz, Round, VS

8 mm (calibrated)

$ 35.05

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0.58ctw Blue Kyanite, Round, VS-SI

3.7 mm

$ 10.40

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1.05ctw Blue Zircon, Round, VS

4.5 mm (calibrated)

$ 27.61

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0.40ct Blue Kyanite, Round, SI

4 mm (calibrated)

$ 9.96

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0.54ctw Blue Kyanite, Round, VS-SI

3.8 mm

$ 9.68

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6.79ct Blue Larimar, Round, Opaque

12 mm (calibrated)

$ 77.57

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1.14ctw Blue Sapphire, Round, VS

5 mm (calibrated)

$ 499.59

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0.45ct Blue Kyanite, Round, SI

4.3 mm

$ 11.21

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0.45ct Blue Kyanite, Round, SI

4.3 mm

$ 11.21

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4.73ctw Blue Topaz, Round, VVS-VS

8 mm (calibrated)

$ 36.27

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0.06ct Blue Diamond, Round, VVS-VS

2.5 mm (calibrated)

$ 59.34

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13.89ct Blue Color-Change Fluorite, Round, VS

15 mm (calibrated)

$ 380.46

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13.99ct Blue Color-Change Fluorite, Round, VS

15 mm (calibrated)

$ 306.55

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0.34ct Blue Kyanite, Round, VS-SI

4 mm (calibrated)

$ 8.47

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1.03ctw Blue Zircon, Round, VS

4.5 mm (calibrated)

$ 22.57

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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

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

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 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.

Posted By Maharishi in June, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate
Enlarged Gemstone Image