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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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For Example: 8-9
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Orange Untreated Gemstones
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1.50ct Yellow Tourmaline, Oval, VVS

1.50ct Yellow Tourmaline, Oval, VVS

8 x 6 mm (calibrated)

$ 174.30

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34.20ct Violet Amethyst, Oval, VVS-VS
Amethyst Product Video (751305)

34.20ct Violet Amethyst, Oval, VVS-VS

22.9 x 17.7 mm

$ 227.09

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5.08ct Blue Larimar, Oval, Opaque

5.08ct Blue Larimar, Oval, Opaque

12 x 10 mm (calibrated)

$ 65.25

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0.36ct Orange Sphalerite, Round, SI-I1

0.36ct Orange Sphalerite, Round, SI-I1

4 mm (calibrated)

$ 17.93

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4.68ct Violet Amethyst, Pear Shape, VVS-VS

4.68ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 30.77

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0.70ct Orange Citrine, Oval, VVS-VS

0.70ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.97

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1.32ct Brown Sillimanite Cat'S Eye, Oval, Translucent

1.32ct Brown Sillimanite Cat'S Eye, Oval, Translucent

7 x 5 mm (calibrated)

$ 3.94

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4.60ct Multicolor Fire Agate, Fancy, Translucent

4.60ct Multicolor Fire Agate, Fancy, Translucent

12.6 x 9.8 mm

$ 36.09

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1.71ctw Violet Amethyst, Marquise, VS

1.71ctw Violet Amethyst, Marquise, VS

9.8 x 4.8 mm

$ 11.35

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4.91ctw Green Tsavorite Garnet, Round, VS
Tsavorite Garnet Product Video (451631)

4.91ctw Green Tsavorite Garnet, Round, VS

2.2 mm (calibrated)

$ 195.61

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0.84ct Green Sphene, Oval, Transparent

0.84ct Green Sphene, Oval, Transparent

6.3 x 5.1 mm

$ 4.18

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1.21ctw Orange Zircon, Oval, VS

1.21ctw Orange Zircon, Oval, VS

5.2 x 4 mm

$ 30.13

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1.52ct Yellow Citrine, Trillion, VVS-VS

1.52ct Yellow Citrine, Trillion, VVS-VS

8.5 x 8.4 mm

$ 9.41

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2.77ctw White Rainbow Moonstone, Square, Transparent

2.77ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 51.59

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79.12ctw Gray Hematite, Pear Shape, Opaque

79.12ctw Gray Hematite, Pear Shape, Opaque

24.7 x 16.9 mm

$ 70.14

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1.66ct Green Tourmaline, Emerald Cut, VS

1.66ct Green Tourmaline, Emerald Cut, VS

18.7 x 3.3 mm

$ 54.56

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23.76ctw Multicolor Labradorite, Oval, Translucent

23.76ctw Multicolor Labradorite, Oval, Translucent

21.3 x 15.4 mm

$ 52.06

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1.57ct Yellow Zircon, Oval, VVS
Zircon Product Video (531176)

1.57ct Yellow Zircon, Oval, VVS

7.8 x 5.5 mm

$ 43.01

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0.73ct Yellow Color-Change Diaspore, Marquise, VVS-VS

0.73ct Yellow Color-Change Diaspore, Marquise, VVS-VS

10.1 x 4.8 mm

$ 26.18

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0.74ct Orange Zircon, Oval, VVS

0.74ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 11.06

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5.24ct Brown Tiger'S Eye, Oval, Opaque

5.24ct Brown Tiger'S Eye, Oval, Opaque

14 x 9 mm (calibrated)

$ 3.08

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1.23ct Pink Morganite, Round, VS

1.23ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 94.33

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5.25ct White Jadeite, Marquise, Translucent

5.25ct White Jadeite, Marquise, Translucent

20.8 x 11.2 mm

$ 17.26

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0.87ctw Green Peridot, Pear Shape, VVS-VS

0.87ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 7.63

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 -> 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

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate
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