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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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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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44.00ct Multicolor Chrysocolla, Round, Opaque

44.00ct Multicolor Chrysocolla, Round, Opaque

30.1 mm

$ 72.31

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6.64ctw Green Prehnite, Oval, Transparent

6.64ctw Green Prehnite, Oval, Transparent

7.3 x 6.3 mm

$ 36.37

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1.07ct Red Rhodolite Garnet, Oval, VS

1.07ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 23.45

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4.83ct Violet Amethyst, Round, Transparent

4.83ct Violet Amethyst, Round, Transparent

11 mm (calibrated)

$ 31.76

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2.04ctw Yellow Beryl, Oval, VS

2.04ctw Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 40.64

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0.11ct Green Kornerupine, Round, VS-SI

0.11ct Green Kornerupine, Round, VS-SI

2.9 mm (calibrated)

$ 6.03

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4.72ct Yellow Citrine, Oval, VVS

4.72ct Yellow Citrine, Oval, VVS

15 x 10 mm (calibrated)

$ 28.59

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21.47ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (371434)

21.47ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 94.09

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0.88ct Yellow Tourmaline, Briolette, VS

0.88ct Yellow Tourmaline, Briolette, VS

6.9 x 4.4 mm

$ 13.30

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26.31ctw White Quartz, Pear Shape, Transparent
Quartz Product Video (501552)

26.31ctw White Quartz, Pear Shape, Transparent

40.6 x 12.6 mm

$ 86.70

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16.75ct Violet Amethyst, Oval, VS
Amethyst Product Video (745407)

16.75ct Violet Amethyst, Oval, VS

20 x 15 mm (calibrated)

$ 111.22

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23.96ct White Rainbow Moonstone, Pear Shape, Translucent

23.96ct White Rainbow Moonstone, Pear Shape, Translucent

29 x 15.9 mm

$ 167.05

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0.99ctw Green Peridot, Marquise, VS

0.99ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 14.79

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1.10ct Orange Hessonite Garnet, Oval, VVS-VS

1.10ct Orange Hessonite Garnet, Oval, VVS-VS

7 x 5.7 mm

$ 16.80

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0.98ct Pink Morganite, Oval, VVS

0.98ct Pink Morganite, Oval, VVS

7.7 x 5.8 mm

$ 39.04

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3.32ct Yellow Citrine, Oval, VVS-VS

3.32ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 23.15

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3.64ctw Green Tsavorite Garnet, Pear Shape, VS
Tsavorite Garnet Product Video (482556)

3.64ctw Green Tsavorite Garnet, Pear Shape, VS

4.9 x 2.8 mm

$ 199.40

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5.16ct Green Malachite, Oval, Opaque

5.16ct Green Malachite, Oval, Opaque

10.5 x 8.3 mm

$ 3.95

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1.04ctw Yellow Citrine, Marquise, VVS-VS

1.04ctw Yellow Citrine, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 6.91

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5.26ct Multicolor Ruby In Fuchsite, Marquise, Translucent

5.26ct Multicolor Ruby In Fuchsite, Marquise, Translucent

20.4 x 9.8 mm

$ 39.36

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4.46ct Yellow Citrine, Cushion, VVS-VS

4.46ct Yellow Citrine, Cushion, VVS-VS

13.1 x 9.6 mm

$ 34.20

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9.48ct White Rainbow Moonstone, Fancy, Transparent

9.48ct White Rainbow Moonstone, Fancy, Transparent

17.8 x 9.7 mm

$ 169.96

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1.22ct Green Tourmaline, Oval, Transparent

1.22ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 22.27

View Gem
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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

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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