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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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0.51ct Blue Sapphire, Round, VVS

5 mm (calibrated)

$ 343.56

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1.68ct Blue Sapphire, Round, VVS-VS

7 mm (calibrated)

$ 1,003.97

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1.10ct Blue Kyanite, Round, SI

6 mm (calibrated)

$ 27.39

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0.92ct Blue Kyanite, Round, VS-SI

6 mm (calibrated)

$ 25.20

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13.04ctw Blue Chalcedony, Round, Transparent

13 mm (calibrated)

$ 14.28

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0.46ct Blue Kyanite, Round, SI

4.3 mm

$ 11.45

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0.81ctw Blue Apatite, Round, Transparent

4.2 mm

$ 16.65

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7.03ct Blue Larimar, Round, Opaque

12 mm (calibrated)

$ 73.02

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0.64ct Blue Sapphire, Round, VS

5 mm (calibrated)

$ 380.96

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0.57ct Blue Sapphire, Round, VVS-VS

5 mm (calibrated)

$ 349.06

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0.31ct Blue Kyanite, Round, VS-SI

4 mm (calibrated)

$ 7.72

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6.92ct Blue Larimar, Round, Opaque

12 mm (calibrated)

$ 79.05

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0.37ct Blue Kyanite, Round, SI

4.2 mm

$ 9.21

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0.06ct Blue Diamond, Round, VS

2.3 mm (calibrated)

$ 59.76

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0.40ct Blue Kyanite, Round, SI

4.2 mm

$ 9.96

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1.18ctw Blue Tanzanite, Round, Translucent

5 mm (calibrated)

$ 19.39

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0.39ct Blue Kyanite, Round, SI

4.5 mm (calibrated)

$ 9.71

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0.48ctw Blue Kyanite, Round, VS-SI

3.5 mm (calibrated)

$ 8.61

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0.03ct Blue Diamond, Round, SI

2.1 mm (calibrated)

$ 30.44

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0.47ct Blue Kyanite, Round, SI

4.2 mm

$ 11.70

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0.57ct Blue Sapphire, Round, VS

5 mm (calibrated)

$ 383.97

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0.61ctw Blue Kyanite, Round, VS

3.7 mm

$ 15.19

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13.49ct Blue Color-Change Fluorite, Round, VS

15 mm (calibrated)

$ 369.50

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0.48ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 11.95

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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

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
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Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
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Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

All good

Posted By Oliver in September, 2025
Source: Bizrate
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