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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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4.71ct Multicolor Fire Agate, Fancy, Opaque

4.71ct Multicolor Fire Agate, Fancy, Opaque

10.6 x 9.7 mm

$ 27.87

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1.54ctw Red Rhodolite Garnet, Square, VS

1.54ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.48

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0.68ct Pink Tourmaline, Round, Transparent

0.68ct Pink Tourmaline, Round, Transparent

5.5 mm (calibrated)

$ 27.09

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1.36ct Yellow Color-Change Diaspore, Cushion, VVS

1.36ct Yellow Color-Change Diaspore, Cushion, VVS

7 x 7 mm (calibrated)

$ 71.80

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1.68ct Yellow Beryl, Oval, VVS

1.68ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 33.47

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6.28ct Yellow Citrine, Round, VVS

6.28ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 48.16

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42.24ct Violet Agate, Fancy, Translucent

42.24ct Violet Agate, Fancy, Translucent

28.9 x 27.3 mm

$ 29.45

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4.94ctw Yellow Citrine, Oval, VVS

4.94ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 27.06

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23.17ct Blue Turquoise, Oval, Opaque

23.17ct Blue Turquoise, Oval, Opaque

21.4 x 16.3 mm

$ 69.23

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3.16ctw White Topaz, Cushion, VVS-VS

3.16ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 17.31

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0.89ct Green Peridot, Oval, VS

0.89ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.21

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1.32ct Orange Zircon, Round, VVS-VS

1.32ct Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 28.93

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0.51ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.51ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.8 x 3.6 mm

$ 148.16

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20.47ct Multicolor Jasper, Oval, Opaque

20.47ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 23.55

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113.09ct Multicolor Chrysocolla, Cushion, Opaque
Chrysocolla Product Video (658621)

113.09ct Multicolor Chrysocolla, Cushion, Opaque

49.6 x 33.9 mm

$ 192.61

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1.57ct Pink Tourmaline, Oval, Transparent

1.57ct Pink Tourmaline, Oval, Transparent

8.4 x 6.2 mm

$ 26.91

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1.33ct Purple Spinel, Cushion, VS

1.33ct Purple Spinel, Cushion, VS

6.5 x 6.2 mm

$ 50.17

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3.31ct Yellow Citrine, Square, VS

3.31ct Yellow Citrine, Square, VS

9 x 9 mm (calibrated)

$ 18.14

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0.90ct Orange Hessonite Garnet, Emerald Cut, VVS

0.90ct Orange Hessonite Garnet, Emerald Cut, VVS

6.3 x 4.6 mm

$ 13.39

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1.93ct Green Tsavorite Garnet, Oval, VS
Tsavorite Garnet Product Video (750129)

1.93ct Green Tsavorite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 1,441.71

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1.27ct Pink Tourmaline, Round, Transparent

1.27ct Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 21.77

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1.49ct Green Tourmaline, Emerald Cut, VVS-VS

1.49ct Green Tourmaline, Emerald Cut, VVS-VS

12.7 x 3.9 mm

$ 48.97

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1.03ct Yellow Beryl, Trillion, VVS

1.03ct Yellow Beryl, Trillion, VVS

7.3 x 7 mm

$ 20.52

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3.45ct Multicolor Opal, Oval, Transparent

3.45ct Multicolor Opal, Oval, Transparent

14 x 9 mm (calibrated)

$ 86.74

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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 -> 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 -> 7 star ratings

Easy, quick.

Posted By Mich in June, 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

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 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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