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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
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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
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Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

1.9 mm (calibrated)

$ 15.94

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0.79ct Pink Morganite, Oval, VS

0.79ct Pink Morganite, Oval, VS

7.7 x 5.1 mm

$ 34.62

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1.35ct Yellow Beryl, Oval, VVS

1.35ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 26.89

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1.08ct Purple Spinel, Cushion, VVS

1.08ct Purple Spinel, Cushion, VVS

6.7 x 5.6 mm

$ 59.16

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1.44ct Yellow Beryl, Round, VVS

1.44ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 28.68

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1.60ct Purple Spinel, Cushion, VVS-VS

1.60ct Purple Spinel, Cushion, VVS-VS

7.2 x 6.5 mm

$ 100.98

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0.54ct Pink Morganite, Pear Shape, VVS

0.54ct Pink Morganite, Pear Shape, VVS

7.7 x 4.4 mm

$ 27.12

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1.23ct Purple Spinel, Oval, VS

1.23ct Purple Spinel, Oval, VS

6.3 x 5.6 mm

$ 149.75

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4.84ct White Topaz, Round, VVS-VS

4.84ct White Topaz, Round, VVS-VS

10 mm (calibrated)

$ 26.51

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14.39ct Gray Star Sapphire, Oval, Opaque
Star Sapphire Product Video (470808)

14.39ct Gray Star Sapphire, Oval, Opaque

14 x 12 mm (calibrated)

$ 551.80

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1.31ct Yellow Beryl, Trillion, VVS-VS

1.31ct Yellow Beryl, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 31.32

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1.58ct Yellow Beryl, Oval, VVS

1.58ct Yellow Beryl, Oval, VVS

8.8 x 6.6 mm

$ 37.77

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0.22ct Black Diamond, Round, Opaque

0.22ct Black Diamond, Round, Opaque

3.5 mm (calibrated)

$ 104.66

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3.21ctw Multicolor Andalusite, Round, VS-SI

3.21ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 158.26

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1.35ct Purple Spinel, Cushion, VVS-VS
Spinel Product Video (742830)

1.35ct Purple Spinel, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 134.46

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0.61ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.61ct Green Cat'S Eye Alexandrite, Oval, Opaque

5.5 x 4 mm

$ 126.58

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19.39ctw Black Spinel, Heart, Opaque

19.39ctw Black Spinel, Heart, Opaque

13.7 x 12.9 mm

$ 63.74

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0.99ct Pink Morganite, Pear Shape, VVS-VS

0.99ct Pink Morganite, Pear Shape, VVS-VS

8.8 x 5.4 mm

$ 59.66

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3.04ctw White Topaz, Cushion, VVS-VS

3.04ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.65

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9.95ctw Black Spinel, Round, Opaque

9.95ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 38.15

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4.25ct White Topaz, Heart, VVS-VS

4.25ct White Topaz, Heart, VVS-VS

10 x 10 mm (calibrated)

$ 35.28

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2.18ctw Multicolor Andalusite, Oval, VS

2.18ctw Multicolor Andalusite, Oval, VS

5.2 x 4.2 mm

$ 116.89

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0.56ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.56ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.5 x 3.8 mm

$ 92.96

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1.21ct Purple Spinel, Cushion, VS

1.21ct Purple Spinel, Cushion, VS

6.5 x 6.1 mm

$ 120.52

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

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

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 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate
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