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Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
Blue Natural Untreated Gemstones
Brown Natural Untreated Gemstones
Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
Single
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0.53ct Red Spinel, Oval, VS

0.53ct Red Spinel, Oval, VS

5.4 x 4.4 mm

$ 43.99

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0.54ct Red Spinel, Heart, VS

0.54ct Red Spinel, Heart, VS

5.7 x 5.1 mm

$ 64.80

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5.89ct Pink Morganite, Pear Shape, Transparent

5.89ct Pink Morganite, Pear Shape, Transparent

14 x 10 mm (calibrated)

$ 24.44

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0.42ct Pink Morganite, Pear Shape, VS

0.42ct Pink Morganite, Pear Shape, VS

6.6 x 4.7 mm

$ 18.82

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0.81ct Purple Spinel, Cushion, VS-SI
Spinel Product Video (691814)

0.81ct Purple Spinel, Cushion, VS-SI

5.7 x 4 mm

$ 56.47

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7.32ctw Black Spinel, Round, Opaque

7.32ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 24.06

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0.78ct Pink Morganite, Pear Shape, VVS

0.78ct Pink Morganite, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 32.37

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8.20ctw Black Spinel, Round, Opaque

8.20ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 31.44

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0.18ct Black Diamond, Round, Opaque

0.18ct Black Diamond, Round, Opaque

3.5 mm (calibrated)

$ 85.62

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1.21ct Pink Morganite, Pear Shape, VS

1.21ct Pink Morganite, Pear Shape, VS

10.3 x 5.9 mm

$ 92.79

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0.87ct Purple Spinel, Oval, VS

0.87ct Purple Spinel, Oval, VS

6.1 x 5.4 mm

$ 72.21

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1.13ct Yellow Rutile Topaz, Pear Shape, Transparent

1.13ct Yellow Rutile Topaz, Pear Shape, Transparent

8 x 8 mm (calibrated)

$ 23.45

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3.67ctw Multicolor Andalusite, Round, VS

3.67ctw Multicolor Andalusite, Round, VS

3.2 mm

$ 161.36

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1.50ct Yellow Beryl, Oval, VVS-VS

1.50ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 29.88

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0.66ct Purple Spinel, Round, VS

0.66ct Purple Spinel, Round, VS

5 mm (calibrated)

$ 28.37

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0.17ctw White Diamond, Round, VVS-VS

0.17ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 276.28

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3.02ct Brown Diamond, Cushion, VS-SI
Diamond Product Video (460461)

3.02ct Brown Diamond, Cushion, VS-SI

8 x 8 mm (calibrated)

$ 4,632.20

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4.25ctw Pink Morganite, Round, Translucent

4.25ctw Pink Morganite, Round, Translucent

8 mm (calibrated)

$ 42.33

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3.52ct Yellow Rutile Topaz, Pear Shape, Transparent

3.52ct Yellow Rutile Topaz, Pear Shape, Transparent

14.4 x 7 mm

$ 73.04

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0.45ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.45ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.1 x 2.8 mm

$ 74.70

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2.31ctw Multicolor Andalusite, Round, VS-SI

2.31ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 113.89

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 10.27

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0.29ct Red Spinel, Baguette, VS

0.29ct Red Spinel, Baguette, VS

3.4 x 3.1 mm

$ 24.07

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0.78ct Black Diamond, Round, Opaque
Diamond Product Video (668697)

0.78ct Black Diamond, Round, Opaque

5.3 mm

$ 621.50

View Gem
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Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

GemSelect Certified Store Reviews

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

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image