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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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25.57ctw Multicolor Fossil Coral, Trillion, Opaque

25.57ctw Multicolor Fossil Coral, Trillion, Opaque

20.7 x 15.9 mm

$ 28.02

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11.84ct Brown Smoky Quartz, Round, VVS-VS

11.84ct Brown Smoky Quartz, Round, VVS-VS

16 mm (calibrated)

$ 14.39

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24.78ct Multicolor Rhodochrosite, Oval, Opaque
Rhodochrosite Product Video (391832)

24.78ct Multicolor Rhodochrosite, Oval, Opaque

20 x 15 mm (calibrated)

$ 54.30

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7.02ct Bi-Color Tourmaline, Fancy, Translucent
Tourmaline Product Video (472843)

7.02ct Bi-Color Tourmaline, Fancy, Translucent

21.7 x 10.4 mm

$ 76.91

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3.44ctw Pink Strawberry Quartz, Oval, Transparent

3.44ctw Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 18.16

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12.26ct Pink Rose Quartz, Emerald Cut, Transparent

12.26ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 67.16

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2.75ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

2.75ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 54.23

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1.88ct Yellow Citrine, Trillion, VVS-VS

1.88ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 11.64

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14.43ct Yellow Rutile Quartz, Pear Shape, Translucent

14.43ct Yellow Rutile Quartz, Pear Shape, Translucent

18.8 x 13.7 mm

$ 39.21

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6.43ct Blue Larimar, Oval, Opaque

6.43ct Blue Larimar, Oval, Opaque

12 x 10 mm (calibrated)

$ 76.25

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0.62ct Yellow Zircon, Oval, VVS

0.62ct Yellow Zircon, Oval, VVS

5 x 4 mm (calibrated)

$ 9.26

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0.73ctw Blue Kyanite, Oval, SI-I1

0.73ctw Blue Kyanite, Oval, SI-I1

5.1 x 3.3 mm

$ 15.99

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5.16ct Black Cat'S Eye Scapolite, Oval, Translucent

5.16ct Black Cat'S Eye Scapolite, Oval, Translucent

11 x 8.2 mm

$ 28.27

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14.51ctw Black Spinel, Heart, Opaque

14.51ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 72.26

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1.83ct Green Tourmaline, Emerald Cut, VVS-VS

1.83ct Green Tourmaline, Emerald Cut, VVS-VS

15.5 x 4 mm

$ 44.11

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7.40ct Yellow Citrine, Emerald Cut, VVS-VS

7.40ct Yellow Citrine, Emerald Cut, VVS-VS

14.4 x 10.5 mm

$ 51.59

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0.21ct Black Diamond, Square, Opaque

0.21ct Black Diamond, Square, Opaque

2.9 x 2.9 mm

$ 104.58

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1.45ct Pink Morganite, Round, VS

1.45ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 56.32

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7.68ctw Brown Tiger'S Eye, Oval, Opaque

7.68ctw Brown Tiger'S Eye, Oval, Opaque

12 x 8 mm (calibrated)

$ 9.56

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2.05ctw Orange Citrine, Heart, VS

2.05ctw Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 17.02

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0.26ct Violet Iolite, Baguette, VS

0.26ct Violet Iolite, Baguette, VS

5 x 3 mm (calibrated)

$ 10.36

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7.81ct Pink Rose Quartz, Square, Transparent

7.81ct Pink Rose Quartz, Square, Transparent

12 x 12 mm (calibrated)

$ 42.79

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4.32ct Violet Amethyst, Pear Shape, VVS-VS

4.32ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 28.39

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19.38ct Black Obsidian, Pear Shape, Opaque

19.38ct Black Obsidian, Pear Shape, Opaque

24 x 21.2 mm

$ 14.48

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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

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
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Overall Rating -> 9 star ratings

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

Posted By Ray in November, 2025
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Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
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Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate
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