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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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Bi-color Untreated Gemstones
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1.79ct Pink Tourmaline, Cushion, VS

1.79ct Pink Tourmaline, Cushion, VS

7.7 x 7.3 mm

$ 267.43

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0.56ctw Blue Kyanite, Round, VS

0.56ctw Blue Kyanite, Round, VS

3.7 mm

$ 11.62

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2.64ctw Red Pyrope Garnet, Square, VS

2.64ctw Red Pyrope Garnet, Square, VS

4.2 x 4.2 mm

$ 20.25

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0.94ct Multicolor Opal, Oval, Transparent

0.94ct Multicolor Opal, Oval, Transparent

9.9 x 6.4 mm

$ 23.41

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31.18ct Multicolor Labradorite, Round, Opaque
Labradorite Product Video (710763)

31.18ct Multicolor Labradorite, Round, Opaque

25.4 mm

$ 68.94

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5.57ct Purple Kunzite, Oval, VS

5.57ct Purple Kunzite, Oval, VS

11.3 x 9.6 mm

$ 153.28

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32.71ctw Multicolor Coral, Cushion, Opaque
Coral Product Video (566497)

32.71ctw Multicolor Coral, Cushion, Opaque

20 x 15 mm (calibrated)

$ 62.00

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0.38ct Green Sphene, Oval, VS

0.38ct Green Sphene, Oval, VS

5.4 x 3.6 mm

$ 16.65

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2.74ctw Red Pyrope Garnet, Marquise, VVS-VS

2.74ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.2 mm

$ 24.01

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2.18ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.18ct Orange Hessonite Garnet, Emerald Cut, VS-SI

9.2 x 6.3 mm

$ 40.89

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12.46ctw Green Prehnite, Fancy, Transparent

12.46ctw Green Prehnite, Fancy, Transparent

17.6 x 11.4 mm

$ 19.52

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13.63ct Orange Moonstone, Round, Opaque

13.63ct Orange Moonstone, Round, Opaque

14 mm (calibrated)

$ 27.15

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1.83ct Green Sphene, Oval, Transparent

1.83ct Green Sphene, Oval, Transparent

7.3 x 6.6 mm

$ 9.11

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1.59ct Yellow Citrine, Round, VVS-VS

1.59ct Yellow Citrine, Round, VVS-VS

7.5 mm (calibrated)

$ 12.67

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19.70ct Brown Tiger'S Eye, Baguette, Opaque

19.70ct Brown Tiger'S Eye, Baguette, Opaque

20 x 15 mm (calibrated)

$ 19.62

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1.27ctw Orange Zircon, Oval, VVS-VS

1.27ctw Orange Zircon, Oval, VVS-VS

5.3 x 4.1 mm

$ 31.62

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3.05ctw Red Pyrope Garnet, Marquise, VVS-VS

3.05ctw Red Pyrope Garnet, Marquise, VVS-VS

11.9 x 6 mm

$ 26.73

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8.55ct Multicolor Coral, Oval, Translucent

8.55ct Multicolor Coral, Oval, Translucent

18 x 13 mm (calibrated)

$ 28.10

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7.29ct Black Star Diopside, Oval, Opaque

7.29ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 36.30

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1.06ct Violet Amethyst, Square, VS

1.06ct Violet Amethyst, Square, VS

6 x 6 mm (calibrated)

$ 8.45

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25.41ct White Rainbow Moonstone, Pear Shape, Translucent

25.41ct White Rainbow Moonstone, Pear Shape, Translucent

27.6 x 19.2 mm

$ 177.16

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30.58ctw Multicolor Fossil Coral, Oval, Opaque
Fossil Coral Product Video (514172)

30.58ctw Multicolor Fossil Coral, Oval, Opaque

23.1 x 13.6 mm

$ 66.34

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23.89ct White Howlite, Cushion, Opaque

23.89ct White Howlite, Cushion, Opaque

26.9 x 17.6 mm

$ 11.90

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1.66ct Green Tourmaline, Emerald Cut, VVS-VS

1.66ct Green Tourmaline, Emerald Cut, VVS-VS

18.5 x 3.1 mm

$ 35.42

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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

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

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
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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