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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
Single
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27.44ctw Multicolor Coral, Oval, Opaque

27.44ctw Multicolor Coral, Oval, Opaque

22.1 x 13.6 mm

$ 52.01

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0.06ctw White Diamond, Round, VVS

0.06ctw White Diamond, Round, VVS

2 mm (calibrated)

$ 136.95

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8.18ct Multicolor Jasper, Pear Shape, Opaque

8.18ct Multicolor Jasper, Pear Shape, Opaque

21 x 14.1 mm

$ 8.96

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11.57ct Green Uvarovite Garnet Drusy, Fancy, Opaque

11.57ct Green Uvarovite Garnet Drusy, Fancy, Opaque

16.2 x 13.8 mm

$ 17.29

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5.06ct Multicolor Ruby In Fuchsite, Marquise, Translucent

5.06ct Multicolor Ruby In Fuchsite, Marquise, Translucent

17.1 x 9.5 mm

$ 37.36

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3.19ct Orange Sunstone, Round, Transparent

3.19ct Orange Sunstone, Round, Transparent

10 mm (calibrated)

$ 18.59

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1.81ctw Yellow Citrine, Marquise, VS

1.81ctw Yellow Citrine, Marquise, VS

9.1 x 5.2 mm

$ 14.43

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34.18ct Green Maw-Sit-Sit, Baguette, Opaque
Maw-Sit-Sit Product Video (476875)

34.18ct Green Maw-Sit-Sit, Baguette, Opaque

19.7 x 16.3 mm

$ 112.34

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9.85ct Multicolor Jasper, Cushion, Opaque

9.85ct Multicolor Jasper, Cushion, Opaque

16.5 x 12.7 mm

$ 10.80

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1.45ct Orange Sunstone, Oval, Translucent

1.45ct Orange Sunstone, Oval, Translucent

8.5 x 6.8 mm

$ 8.67

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20.63ct Green Fluorite, Oval, Transparent
Fluorite Product Video (475466)

20.63ct Green Fluorite, Oval, Transparent

17 x 14.3 mm

$ 90.40

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1.42ct Multicolor Labradorite, Marquise, Translucent

1.42ct Multicolor Labradorite, Marquise, Translucent

10 x 5 mm (calibrated)

$ 3.14

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1.66ct Purple Spinel, Cushion, VVS-VS

1.66ct Purple Spinel, Cushion, VVS-VS

7.1 x 6.4 mm

$ 165.34

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11.24ctw Violet Amethyst, Cushion, VVS

11.24ctw Violet Amethyst, Cushion, VVS

15.2 x 9.1 mm

$ 78.37

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16.43ct Black Nuummite, Oval, Opaque

16.43ct Black Nuummite, Oval, Opaque

19.7 x 12.5 mm

$ 72.49

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0.48ct Orange Citrine, Marquise, VS

0.48ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.34

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2.38ct Orange Hessonite Garnet, Cushion, VS-SI

2.38ct Orange Hessonite Garnet, Cushion, VS-SI

7.6 x 7.6 mm

$ 52.15

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8.02ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (385929)

8.02ct Yellow Apatite, Pear Shape, VS

16 x 12 mm (calibrated)

$ 423.52

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0.97ct Gray Sillimanite Cat'S Eye, Oval, Translucent

0.97ct Gray Sillimanite Cat'S Eye, Oval, Translucent

7 x 4 mm

$ 2.42

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18.19ct Violet Amethyst, Round, VS

18.19ct Violet Amethyst, Round, VS

18 mm (calibrated)

$ 126.82

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4.32ct Pink Strawberry Quartz, Oval, Translucent

4.32ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 51.63

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1.63ct Green Sphene, Oval, Transparent

1.63ct Green Sphene, Oval, Transparent

7.6 x 6.1 mm

$ 8.93

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0.70ct White Topaz, Oval, VVS

0.70ct White Topaz, Oval, VVS

6.1 x 4.2 mm

$ 4.88

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3.57ctw Orange Moonstone, Trillion, Translucent

3.57ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 7.15

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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 -> 9 star ratings

I've made several purchases over the last 8 years and I've never been less than happy with any of them.

Posted By Jess in July, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good. I have made several purchases as a collector over the years, and have never been dissapointed in the selection, process, or delivery.

Posted By Schmoove in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate
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