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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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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.69ct White Moonstone, Oval, Transparent

2.69ct White Moonstone, Oval, Transparent

10 x 8 mm (calibrated)

$ 23.57

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1.57ct Green Tourmaline, Emerald Cut, VVS-VS

1.57ct Green Tourmaline, Emerald Cut, VVS-VS

22.9 x 2.8 mm

$ 51.60

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.5 x 4.5 mm

$ 18.92

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1.10ct Orange Hessonite Garnet, Pear Shape, VS-SI

1.10ct Orange Hessonite Garnet, Pear Shape, VS-SI

7.9 x 5.6 mm

$ 24.10

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4.85ct Yellow Citrine, Oval, VVS-VS

4.85ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 37.20

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0.51ct Blue Kyanite, Round, SI

0.51ct Blue Kyanite, Round, SI

4.3 mm

$ 12.70

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16.63ct Yellow Druzy Citrine, Pear Shape, Opaque

16.63ct Yellow Druzy Citrine, Pear Shape, Opaque

18.4 x 15.8 mm

$ 30.88

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40.14ct Multicolor Jasper, Oval, Opaque

40.14ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 24.63

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1.35ct Orange Hessonite Garnet, Oval, VS

1.35ct Orange Hessonite Garnet, Oval, VS

7.5 x 6.1 mm

$ 22.19

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1.23ct Purple Sapphire, Pear Shape, VVS-VS
Sapphire Product Video (448510)

1.23ct Purple Sapphire, Pear Shape, VVS-VS

8.4 x 5.6 mm

$ 649.54

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0.62ct Green Peridot, Marquise, VS

0.62ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 9.26

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3.72ctw Red Pyrope Garnet, Square, VS

3.72ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 28.53

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39.40ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

39.40ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

31.9 x 21.8 mm

$ 39.24

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7.15ct Multicolor Rainbow Pyrite, Fancy, Opaque

7.15ct Multicolor Rainbow Pyrite, Fancy, Opaque

17 x 10.8 mm

$ 25.14

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1.14ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

1.14ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

11.1 x 4.1 mm

$ 60.18

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8.96ctw Black Spinel, Round, Opaque

8.96ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 34.36

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3.43ctw Red Pyrope Garnet, Square, VS

3.43ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 26.30

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0.36ct Blue Kyanite, Round, SI

0.36ct Blue Kyanite, Round, SI

4 mm (calibrated)

$ 8.96

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1.22ct Pink Tourmaline, Emerald Cut, VS-SI

1.22ct Pink Tourmaline, Emerald Cut, VS-SI

10 x 4 mm

$ 92.23

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32.76ct Multicolor Jasper, Oval, Opaque

32.76ct Multicolor Jasper, Oval, Opaque

33.6 x 18.6 mm

$ 35.90

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15.18ct White Howlite, Pear Shape, Opaque

15.18ct White Howlite, Pear Shape, Opaque

23.6 x 16.4 mm

$ 7.56

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18.51ct Multicolor Peanut Wood, Pear Shape, Opaque

18.51ct Multicolor Peanut Wood, Pear Shape, Opaque

28.8 x 19.1 mm

$ 11.06

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1.08ct Purple Rhodolite Garnet, Oval, VS

1.08ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 28.68

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1.13ct Yellow Sillimanite, Oval, VVS-VS

1.13ct Yellow Sillimanite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 43.33

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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've been looking for.

Posted By Tree Dog in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 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

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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