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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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0.16ct Pink Morganite, Round, VVS

0.16ct Pink Morganite, Round, VVS

4 mm (calibrated)

$ 6.64

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2.37ctw Red Pyrope Garnet, Marquise, VVS-VS

2.37ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5 mm

$ 20.77

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6.64ct Violet Amethyst, Oval, Transparent
Amethyst Product Video (636234)

6.64ct Violet Amethyst, Oval, Transparent

13.2 x 12.3 mm

$ 46.30

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33.23ct Gray Hematite, Oval, Opaque

33.23ct Gray Hematite, Oval, Opaque

21.7 x 17.4 mm

$ 33.50

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3.04ct Multicolor Labradorite, Baguette, Translucent

3.04ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 4.18

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8.59ct White Dendritic Agate, Pear Shape, Opaque

8.59ct White Dendritic Agate, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 6.84

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0.44ctw Blue Kyanite, Round, VS-SI

0.44ctw Blue Kyanite, Round, VS-SI

3.7 mm

$ 10.96

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2.30ct Green Peridot, Cushion, VVS-VS

2.30ct Green Peridot, Cushion, VVS-VS

8 x 6.9 mm

$ 82.33

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2.82ct Violet Amethyst, Trillion, VS

2.82ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 19.66

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8.42ct White Dendritic Agate, Pear Shape, Opaque

8.42ct White Dendritic Agate, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 6.71

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0.33ct Green Kornerupine, Oval, VS-SI

0.33ct Green Kornerupine, Oval, VS-SI

5.3 x 3.7 mm

$ 28.27

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1.64ct Orange Hessonite Garnet, Oval, VS-SI

1.64ct Orange Hessonite Garnet, Oval, VS-SI

8 x 6.4 mm

$ 32.34

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59.84ct Multicolor Jasper, Oval, Opaque

59.84ct Multicolor Jasper, Oval, Opaque

35.3 x 23.3 mm

$ 51.14

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11.34ct Multicolor Quartz With Marcasite, Oval, Transparent

11.34ct Multicolor Quartz With Marcasite, Oval, Transparent

17.2 x 13.3 mm

$ 74.54

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1.43ct Yellow Beryl, Round, VVS

1.43ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 28.49

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4.90ct Yellow Apatite, Oval, VVS-VS
Apatite Product Video (514428)

4.90ct Yellow Apatite, Oval, VVS-VS

13 x 10.1 mm

$ 214.74

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1.89ct Orange Hessonite Garnet, Oval, VVS-VS

1.89ct Orange Hessonite Garnet, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 37.65

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22.23ct Brown Tiger'S Eye, Oval, Opaque

22.23ct Brown Tiger'S Eye, Oval, Opaque

25 x 18 mm (calibrated)

$ 24.35

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21.49ctw Multicolor Fossil Coral, Cushion, Opaque

21.49ctw Multicolor Fossil Coral, Cushion, Opaque

17 x 13.2 mm

$ 46.62

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20.82ct Green Opal, Oval, Opaque

20.82ct Green Opal, Oval, Opaque

21 x 17 mm

$ 44.58

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11.37ct Pink Rose Quartz, Oval, Transparent

11.37ct Pink Rose Quartz, Oval, Transparent

14.9 x 13.8 mm

$ 62.29

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19.97ctw Multicolor Jasper, Pear Shape, Opaque

19.97ctw Multicolor Jasper, Pear Shape, Opaque

20.2 x 16.1 mm

$ 11.74

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17.40ct Gray Hematite, Emerald Cut, Opaque

17.40ct Gray Hematite, Emerald Cut, Opaque

18.5 x 14.4 mm

$ 14.62

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5.93ct Yellow Citrine, Emerald Cut, VVS-VS

5.93ct Yellow Citrine, Emerald Cut, VVS-VS

11.1 x 10 mm

$ 45.48

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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

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

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 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 -> 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 -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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