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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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15.81ct Green Bloodstone, Oval, Opaque

15.81ct Green Bloodstone, Oval, Opaque

15.4 x 13.3 mm

$ 32.31

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0.06ct Black Diamond, Round, Opaque

0.06ct Black Diamond, Round, Opaque

2.4 mm (calibrated)

$ 29.03

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23.91ct Green Jadeite, Fancy, Translucent

23.91ct Green Jadeite, Fancy, Translucent

29.1 x 14.3 mm

$ 14.14

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18.06ct Gray Hematite, Marquise, Opaque

18.06ct Gray Hematite, Marquise, Opaque

26.4 x 12.1 mm

$ 17.61

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5.85ctw Brown Tiger'S Eye, Oval, Opaque

5.85ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 8.75

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0.61ct Orange Sphalerite, Round, VS-SI

0.61ct Orange Sphalerite, Round, VS-SI

5 mm (calibrated)

$ 30.38

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1.78ct Pink Strawberry Quartz, Oval, Translucent

1.78ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.90

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5.65ct Yellow Citrine, Oval, VVS

5.65ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 33.92

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3.18ctw White Rainbow Moonstone, Pear Shape, Transparent

3.18ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 69.68

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2.37ctw Yellow Citrine, Round, VVS-VS

2.37ctw Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 16.53

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35.11ct Multicolor Rhodochrosite, Oval, Translucent

35.11ct Multicolor Rhodochrosite, Oval, Translucent

28.1 x 17 mm

$ 41.93

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0.83ct Green Peridot, Oval, VVS-VS

0.83ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.44

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1.60ct Yellow Citrine, Emerald Cut, VVS-VS

1.60ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 12.27

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1.16ct Orange Moonstone, Marquise, Translucent

1.16ct Orange Moonstone, Marquise, Translucent

10 x 5 mm (calibrated)

$ 2.31

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0.17ct Green Kornerupine, Oval, VS

0.17ct Green Kornerupine, Oval, VS

3.6 x 2.8 mm

$ 9.31

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25.96ct Violet Amethyst, Oval, VVS-VS

25.96ct Violet Amethyst, Oval, VVS-VS

22.8 x 18.4 mm

$ 199.09

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26.76ct Gray Hematite, Baguette, Opaque

26.76ct Gray Hematite, Baguette, Opaque

17.6 x 14 mm

$ 26.98

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3.04ct Green Prehnite, Oval, Transparent/Translucent

3.04ct Green Prehnite, Oval, Transparent/Translucent

9 x 7.8 mm

$ 9.00

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0.52ct Orange Citrine, Marquise, VS

0.52ct Orange Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.63

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5.97ct Pink Morganite, Round, Transparent

5.97ct Pink Morganite, Round, Transparent

13 mm (calibrated)

$ 65.40

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0.60ct Orange Spessartite Garnet, Round, VS

0.60ct Orange Spessartite Garnet, Round, VS

4.5 mm (calibrated)

$ 20.92

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7.42ctw Violet Amethyst, Oval, Transparent

7.42ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 40.65

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1.07ct Purple Spinel, Oval, VVS

1.07ct Purple Spinel, Oval, VVS

7.1 x 5.4 mm

$ 110.22

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9.14ct Pink Rose Quartz, Emerald Cut, Transparent

9.14ct Pink Rose Quartz, Emerald Cut, Transparent

13 x 13 mm (calibrated)

$ 50.07

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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

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
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

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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