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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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21.59ct Multicolor Jasper, Oval, Opaque

21.59ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 23.66

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14.42ct Multicolor Amethyst Geode Slice, Fancy, Transparent

14.42ct Multicolor Amethyst Geode Slice, Fancy, Transparent

20 x 15 mm (calibrated)

$ 15.37

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1.74ct Red Tourmaline, Flower Cut, Transparent

1.74ct Red Tourmaline, Flower Cut, Transparent

7.1 x 6.3 mm

$ 33.91

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1.66ct Multicolor Labradorite, Marquise, Translucent

1.66ct Multicolor Labradorite, Marquise, Translucent

10 x 5 mm (calibrated)

$ 3.68

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0.95ctw Red Pyrope Garnet, Square, VS

0.95ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 7.29

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18.42ct Multicolor Jasper, Oval, Opaque

18.42ct Multicolor Jasper, Oval, Opaque

30.2 x 19.5 mm

$ 15.14

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4.96ct Yellow Citrine, Emerald Cut, VVS-VS

4.96ct Yellow Citrine, Emerald Cut, VVS-VS

12 x 10 mm (calibrated)

$ 38.04

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1.75ctw Red Pyrope Garnet, Heart, VVS-VS

1.75ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.20

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4.80ct Pink Morganite, Oval, Transparent

4.80ct Pink Morganite, Oval, Transparent

14 x 10 mm (calibrated)

$ 19.92

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0.21ct Black Diamond, Round, Opaque

0.21ct Black Diamond, Round, Opaque

3.5 mm (calibrated)

$ 99.90

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5.23ct Brown Smoky Quartz, Emerald Cut, VVS-VS

5.23ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13.1 x 10 mm

$ 22.92

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2.19ct Red Almandine Garnet, Oval, VVS-VS

2.19ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 81.80

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0.65ct Red Pyrope Garnet, Heart, VVS-VS

0.65ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 5.18

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9.21ct Multicolor Coral, Round, Translucent
Coral Product Video (564826)

9.21ct Multicolor Coral, Round, Translucent

15 mm (calibrated)

$ 30.27

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5.70ct Yellow Citrine, Oval, VVS-VS

5.70ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 34.22

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0.98ct Orange Citrine, Heart, VS

0.98ct Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 8.13

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3.27ctw Orange Citrine, Round, VS
Citrine Product Video (751829)

3.27ctw Orange Citrine, Round, VS

8 mm (calibrated)

$ 27.14

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1.85ct Multicolor Opal, Marquise, Transparent/Translucent

1.85ct Multicolor Opal, Marquise, Transparent/Translucent

14 x 7.2 mm

$ 70.02

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0.97ct Yellow Sphalerite, Round, SI-I1

0.97ct Yellow Sphalerite, Round, SI-I1

6 mm (calibrated)

$ 48.31

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3.31ct Brown Tiger'S Eye, Oval, Opaque

3.31ct Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 3.30

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2.30ctw Red Pyrope Garnet, Marquise, VVS-VS

2.30ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 20.16

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1.77ct Orange Hessonite Garnet, Emerald Cut, SI

1.77ct Orange Hessonite Garnet, Emerald Cut, SI

7 x 7 mm (calibrated)

$ 29.77

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0.77ct Yellow Color-Change Diaspore, Baguette, VVS-VS

0.77ct Yellow Color-Change Diaspore, Baguette, VVS-VS

6.7 x 3.8 mm

$ 40.65

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26.13ct Violet Amethyst, Round, VVS

26.13ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 182.18

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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

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 have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
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 -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate
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