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Home › Gemstones › Natural Untreated Gemstones

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
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1.27ct Purple Spinel, Pear Shape, VVS-VS
Spinel Product Video (349316)

1.27ct Purple Spinel, Pear Shape, VVS-VS

8.6 x 5.6 mm

$ 86.97

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3.12ctw Green Tsavorite Garnet, Marquise, VS

3.12ctw Green Tsavorite Garnet, Marquise, VS

4.9 x 2.6 mm

$ 124.30

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8.25ct Violet Amethyst, Cushion, VVS

8.25ct Violet Amethyst, Cushion, VVS

14 x 12 mm (calibrated)

$ 57.52

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10.57ct Multicolor Ruby-Zoisite, Marquise, Opaque

10.57ct Multicolor Ruby-Zoisite, Marquise, Opaque

23.7 x 11.8 mm

$ 28.94

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2.38ctw Red Spessartite Garnet, Oval, VS

2.38ctw Red Spessartite Garnet, Oval, VS

5.2 x 4.2 mm

$ 103.63

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3.23ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

3.23ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 63.69

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1.93ct Orange Hessonite Garnet, Round, VS

1.93ct Orange Hessonite Garnet, Round, VS

7.5 mm (calibrated)

$ 42.29

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22.82ctw Brown Tiger'S Eye, Pear Shape, Opaque

22.82ctw Brown Tiger'S Eye, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 30.00

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1.35ct Red Tourmaline, Round, Transparent

1.35ct Red Tourmaline, Round, Transparent

7 mm (calibrated)

$ 19.28

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2.69ctw Red Spessartite Garnet, Round, VS

2.69ctw Red Spessartite Garnet, Round, VS

4.2 mm

$ 126.49

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1.34ct Pink Morganite, Round, VS

1.34ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 85.64

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0.55ctw Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

0.55ctw Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

4.6 x 2.9 mm

$ 16.43

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12.15ctw Green Aventurine, Pear Shape, Translucent

12.15ctw Green Aventurine, Pear Shape, Translucent

17 x 11.1 mm

$ 26.63

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0.67ct Yellow Sphalerite, Round, SI-I1

0.67ct Yellow Sphalerite, Round, SI-I1

4.5 mm (calibrated)

$ 33.37

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1.19ct Yellow Sphene, Round, VS-SI
Sphene Product Video (526305)

1.19ct Yellow Sphene, Round, VS-SI

6.5 mm (calibrated)

$ 71.71

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5.56ctw Orange Hessonite Garnet, Emerald Cut, VS-SI
Hessonite Garnet Product Video (398839)

5.56ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 5 mm (calibrated)

$ 121.83

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16.27ctw Brown Tiger'S Eye, Oval, Opaque

16.27ctw Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 24.31

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0.51ct Yellow Color-Change Garnet, Square, VVS-VS

0.51ct Yellow Color-Change Garnet, Square, VVS-VS

4.5 x 4.5 mm

$ 52.80

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0.61ct Pink Spinel, Cushion, SI-I1
Spinel Product Video (691805)

0.61ct Pink Spinel, Cushion, SI-I1

4.8 x 4 mm

$ 415.00

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34.63ct Multicolor Jasper, Fancy, Opaque

34.63ct Multicolor Jasper, Fancy, Opaque

27.6 x 23.6 mm

$ 16.43

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7.49ct Violet Amethyst, Round, VS

7.49ct Violet Amethyst, Round, VS

13 mm (calibrated)

$ 49.24

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10.90ctw Green Amazonite, Cushion, Opaque

10.90ctw Green Amazonite, Cushion, Opaque

10 x 10 mm (calibrated)

$ 22.09

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64.77ct Multicolor Jasper, Oval, Opaque

64.77ct Multicolor Jasper, Oval, Opaque

45.8 x 27.8 mm

$ 26.62

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1.41ct Brown Color-Change Garnet, Pear Shape, VS

1.41ct Brown Color-Change Garnet, Pear Shape, VS

9.1 x 5.3 mm

$ 112.65

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

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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