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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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0.63ct Yellow Zircon, Oval, VVS-VS

0.63ct Yellow Zircon, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 15.69

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1.95ct Orange Hessonite Garnet, Cushion, VS-SI

1.95ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 32.79

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0.25ct Blue Iolite, Emerald Cut, VS-SI

0.25ct Blue Iolite, Emerald Cut, VS-SI

5 x 3 mm (calibrated)

$ 9.96

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4.19ct Multicolor Opal, Oval, Transparent

4.19ct Multicolor Opal, Oval, Transparent

14 x 10 mm (calibrated)

$ 105.34

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38.79ct Multicolor Rainbow Moonstone, Fancy, Opaque

38.79ct Multicolor Rainbow Moonstone, Fancy, Opaque

40 x 11.6 mm

$ 3.87

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21.96ct Brown Jasper, Fancy, Opaque

21.96ct Brown Jasper, Fancy, Opaque

40.4 x 12.4 mm

$ 33.67

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30.58ct Green Maw-Sit-Sit, Oval, Opaque

30.58ct Green Maw-Sit-Sit, Oval, Opaque

20 x 15 mm (calibrated)

$ 100.50

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1.00ct Green Chrome Diopside, Marquise, SI

1.00ct Green Chrome Diopside, Marquise, SI

10 x 5 mm (calibrated)

$ 24.90

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3.93ct Yellow Citrine, Oval, VVS

3.93ct Yellow Citrine, Oval, VVS

12 x 10 mm (calibrated)

$ 30.14

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1.38ct Yellow Beryl, Round, VS

1.38ct Yellow Beryl, Round, VS

7 mm (calibrated)

$ 30.24

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1.16ct Red Pyrope Garnet, Marquise, VVS-VS

1.16ct Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5.1 mm

$ 10.17

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8.46ct Multicolor Cinnabar, Round, Opaque

8.46ct Multicolor Cinnabar, Round, Opaque

16 mm (calibrated)

$ 9.90

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2.27ctw White Rainbow Moonstone, Oval, Transparent

2.27ctw White Rainbow Moonstone, Oval, Transparent

7 x 6 mm

$ 74.63

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28.88ct Bi-Color Ametrine, Oval, VVS-VS

28.88ct Bi-Color Ametrine, Oval, VVS-VS

25.4 x 16.2 mm

$ 189.85

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6.89ct Multicolor Agate, Oval, Opaque

6.89ct Multicolor Agate, Oval, Opaque

12.5 x 11.6 mm

$ 5.49

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1.25ct Blue Cavansite, Fancy, Opaque

1.25ct Blue Cavansite, Fancy, Opaque

7.9 x 7.6 mm

$ 7.26

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16.74ct Multicolor Amethyst Geode Slice, Fancy, Transparent

16.74ct Multicolor Amethyst Geode Slice, Fancy, Transparent

23.4 x 16 mm

$ 17.84

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3.14ct Violet Amethyst, Pear Shape, VS

3.14ct Violet Amethyst, Pear Shape, VS

13 x 9 mm (calibrated)

$ 24.09

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36.02ct Multicolor Jasper, Fancy, Opaque

36.02ct Multicolor Jasper, Fancy, Opaque

36.8 x 11.3 mm

$ 10.77

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1.11ct Orange Sphalerite, Round, SI

1.11ct Orange Sphalerite, Round, SI

6 mm (calibrated)

$ 55.28

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1.47ct Green Tourmaline, Emerald Cut, VVS-VS

1.47ct Green Tourmaline, Emerald Cut, VVS-VS

14.1 x 3.3 mm

$ 32.21

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3.26ct Yellow Citrine, Oval, VVS-VS

3.26ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 21.43

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11.00ct Multicolor Labradorite, Marquise, Translucent

11.00ct Multicolor Labradorite, Marquise, Translucent

20 x 10 mm (calibrated)

$ 24.32

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0.91ct Orange Hessonite Garnet, Oval, VS

0.91ct Orange Hessonite Garnet, Oval, VS

6.9 x 5.6 mm

$ 18.13

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

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I do enjoy this website and the wide selection. I would like to see more untreated stones. I also wasn't able to see my past order when I logged in.

Posted By Great selection, ok website in July, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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