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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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1.38ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.38ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 27.21

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34.91ct Multicolor Jasper, Fancy, Opaque

34.91ct Multicolor Jasper, Fancy, Opaque

31.4 x 19 mm

$ 16.83

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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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3.67ct Brown Smoky Quartz, Baguette, VVS

3.67ct Brown Smoky Quartz, Baguette, VVS

12 x 8 mm (calibrated)

$ 10.05

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25.46ct Violet Amethyst, Round, VVS

25.46ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 202.87

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44.18ct Green Idocrase, Oval, Opaque

44.18ct Green Idocrase, Oval, Opaque

32.7 x 25.4 mm

$ 18.33

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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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1.93ct Orange Hessonite Garnet, Round, VS

1.93ct Orange Hessonite Garnet, Round, VS

7.5 mm (calibrated)

$ 42.29

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15.01ctw Green Prehnite, Fancy, Transparent

15.01ctw Green Prehnite, Fancy, Transparent

18.2 x 11.8 mm

$ 23.51

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26.09ct Multicolor Fluorite, Pear Shape, VS-SI

26.09ct Multicolor Fluorite, Pear Shape, VS-SI

23.8 x 17.1 mm

$ 57.43

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6.51ct Brown Smoky Quartz, Flower Cut, Transparent

6.51ct Brown Smoky Quartz, Flower Cut, Transparent

14.2 x 10 mm

$ 24.19

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4.79ct Yellow Citrine, Oval, VVS

4.79ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 33.40

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17.71ctw Brown Tiger'S Eye, Cushion, Opaque

17.71ctw Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 16.17

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0.76ct Pink Morganite, Pear Shape, VS

0.76ct Pink Morganite, Pear Shape, VS

9.8 x 4.7 mm

$ 66.62

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5.39ct Violet Amethyst, Pear Shape, VVS

5.39ct Violet Amethyst, Pear Shape, VVS

15.7 x 11.1 mm

$ 37.58

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5.60ct Yellow Tourmaline, Emerald Cut, SI
Tourmaline Product Video (704356)

5.60ct Yellow Tourmaline, Emerald Cut, SI

11 x 7.8 mm

$ 611.03

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27.68ct White Howlite, Cushion, Opaque

27.68ct White Howlite, Cushion, Opaque

29 x 18.9 mm

$ 13.24

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74.64ct Green Uvarovite Garnet Drusy, Fancy, Opaque

74.64ct Green Uvarovite Garnet Drusy, Fancy, Opaque

44.6 x 28.9 mm

$ 111.51

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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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24.65ct Brown Moonstone, Round, Translucent

24.65ct Brown Moonstone, Round, Translucent

18 mm (calibrated)

$ 49.10

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3.57ct Orange Spessartite Garnet, Emerald Cut, VVS-VS
Spessartite Garnet Product Video (714468)

3.57ct Orange Spessartite Garnet, Emerald Cut, VVS-VS

11.1 x 6.4 mm

$ 1,031.16

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0.77ct Orange Sphalerite, Oval, SI-I1

0.77ct Orange Sphalerite, Oval, SI-I1

5.6 x 5 mm

$ 38.35

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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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18.67ct Violet Amethyst, Emerald Cut, VVS
Amethyst Product Video (716441)

18.67ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 148.76

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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 -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 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

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
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Overall Rating -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
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Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 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
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