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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
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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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15.75ctw Green Prehnite, Fancy, Transparent

15.75ctw Green Prehnite, Fancy, Transparent

16 x 12 mm (calibrated)

$ 24.67

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15.83ct Violet Amethyst, Pear Shape, VVS-VS

15.83ct Violet Amethyst, Pear Shape, VVS-VS

21.2 x 15.5 mm

$ 110.37

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0.58ct Blue Kyanite, Round, SI

0.58ct Blue Kyanite, Round, SI

4.3 mm

$ 14.44

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19.66ct Brown Tiger'S Eye, Baguette, Opaque

19.66ct Brown Tiger'S Eye, Baguette, Opaque

20 x 15 mm (calibrated)

$ 19.58

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4.32ctw Yellow Sillimanite, Oval, VVS-VS

4.32ctw Yellow Sillimanite, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 106.82

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2.08ctw Multicolor Andalusite, Oval, VS-SI

2.08ctw Multicolor Andalusite, Oval, VS-SI

6 x 4 mm (calibrated)

$ 102.55

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7.14ct Yellow Citrine, Cushion, VVS
Citrine Product Video (450739)

7.14ct Yellow Citrine, Cushion, VVS

5.9 x 9.6 mm

$ 49.78

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0.99ct Green Sphene, Oval, Transparent

0.99ct Green Sphene, Oval, Transparent

5.9 x 5.6 mm

$ 5.43

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4.56ct Pink Kunzite, Cushion, VS

4.56ct Pink Kunzite, Cushion, VS

9.3 x 8.4 mm

$ 113.54

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11.23ct Blue Hemimorphite, Oval, Opaque
Hemimorphite Product Video (749641)

11.23ct Blue Hemimorphite, Oval, Opaque

15.9 x 11 mm

$ 326.23

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1.14ctw Multicolor Opal, Oval, Transparent

1.14ctw Multicolor Opal, Oval, Transparent

6 x 4 mm (calibrated)

$ 39.20

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7.98ctw Brown Moonstone, Flower Cut, Translucent

7.98ctw Brown Moonstone, Flower Cut, Translucent

12 x 12 mm (calibrated)

$ 34.97

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2.58ct Multicolor Opal, Oval, Translucent

2.58ct Multicolor Opal, Oval, Translucent

13 x 9 mm (calibrated)

$ 64.24

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2.66ctw Green Peridot, Round, VVS-VS

2.66ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 43.72

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1.47ct Green Sphene, Oval, Transparent

1.47ct Green Sphene, Oval, Transparent

6.9 x 6.1 mm

$ 8.06

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0.06ct White Diamond, Marquise, VVS

0.06ct White Diamond, Marquise, VVS

4 x 2 mm (calibrated)

$ 208.54

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7.47ct Pink Kunzite, Oval, VVS
Kunzite Product Video (694718)

7.47ct Pink Kunzite, Oval, VVS

13 x 9 mm (calibrated)

$ 186.00

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1.69ct Orange Hessonite Garnet, Oval, VS-SI

1.69ct Orange Hessonite Garnet, Oval, VS-SI

7.8 x 6.5 mm

$ 33.66

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1.42ctw Red Pyrope Garnet, Square, VVS-VS

1.42ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 10.89

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3.81ctw Yellow Citrine, Pear Shape, VVS-VS

3.81ctw Yellow Citrine, Pear Shape, VVS-VS

8 x 5 mm (calibrated)

$ 22.79

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23.76ctw Multicolor Fossil Coral, Oval, Opaque

23.76ctw Multicolor Fossil Coral, Oval, Opaque

18.8 x 12.6 mm

$ 29.68

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1.55ct Orange Zircon, Emerald Cut, VVS-VS

1.55ct Orange Zircon, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 25.48

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2.07ct Violet Amethyst, Marquise, VS

2.07ct Violet Amethyst, Marquise, VS

12.1 x 5.9 mm

$ 15.88

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0.68ct Orange Zircon, Oval, VVS

0.68ct Orange Zircon, Oval, VVS

5.2 x 4.2 mm

$ 10.16

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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 was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
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selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
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Recomendado Totalmente Los Productos Se Entregaron A Tiempo

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

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
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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
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