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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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3.59ct Yellow Citrine, Oval, VVS-VS

3.59ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 21.95

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5.19ct Pink Kunzite, Emerald Cut, VS

5.19ct Pink Kunzite, Emerald Cut, VS

11 x 8.5 mm

$ 129.23

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19.65ct Green Amazonite, Cushion, Opaque

19.65ct Green Amazonite, Cushion, Opaque

6 mm (calibrated)

$ 19.96

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0.74ct Orange Citrine, Oval, VVS-VS

0.74ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.37

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0.97ct Pink Morganite, Pear Shape, VS

0.97ct Pink Morganite, Pear Shape, VS

9 x 5.2 mm

$ 74.39

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4.25ct Yellow Citrine, Oval, VVS

4.25ct Yellow Citrine, Oval, VVS

13 x 9 mm (calibrated)

$ 32.60

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3.24ctw Blue Kyanite, Oval, SI

3.24ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 67.45

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1.20ct Green Tourmaline, Emerald Cut, VS

1.20ct Green Tourmaline, Emerald Cut, VS

13.3 x 3.7 mm

$ 31.56

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15.66ct Multicolor Jasper, Oval, Opaque

15.66ct Multicolor Jasper, Oval, Opaque

20 x 15 mm (calibrated)

$ 12.88

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29.19ct Multicolor Pietersite, Cushion, Opaque

29.19ct Multicolor Pietersite, Cushion, Opaque

25.7 x 23.2 mm

$ 96.91

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28.34ct Multicolor Jasper, Oval, Opaque

28.34ct Multicolor Jasper, Oval, Opaque

29.1 x 16.2 mm

$ 15.53

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47.05ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

47.05ct Multicolor Tiger'S Eye Matrix, Cushion, Opaque

27.2 x 24.9 mm

$ 46.86

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2.29ctw Red Pyrope Garnet, Marquise, VVS-VS

2.29ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5 mm (calibrated)

$ 20.07

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8.50ct Brown Tiger'S Eye, Baguette, Opaque

8.50ct Brown Tiger'S Eye, Baguette, Opaque

14.3 x 10.4 mm

$ 8.47

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12.11ctw Multicolor Pietersite, Oval, Opaque

12.11ctw Multicolor Pietersite, Oval, Opaque

20.3 x 13.6 mm

$ 28.34

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1.20ct Green Tourmaline, Emerald Cut, VS-SI

1.20ct Green Tourmaline, Emerald Cut, VS-SI

14 x 3.3 mm

$ 28.93

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1.96ct Orange Hessonite Garnet, Cushion, VS-SI

1.96ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 37.00

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42.17ct Brown Moonstone, Oval, Opaque

42.17ct Brown Moonstone, Oval, Opaque

25 x 18 mm (calibrated)

$ 69.31

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5.79ct Multicolor Coral, Pear Shape, Translucent

5.79ct Multicolor Coral, Pear Shape, Translucent

16.9 x 9.1 mm

$ 19.03

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1.68ct Multicolor Labradorite, Pear Shape, Translucent

1.68ct Multicolor Labradorite, Pear Shape, Translucent

9 x 6 mm (calibrated)

$ 3.72

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12.51ct Brown Smoky Quartz, Emerald Cut, VVS

12.51ct Brown Smoky Quartz, Emerald Cut, VVS

14 x 14 mm (calibrated)

$ 24.53

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32.51ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

32.51ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

34.9 x 19.7 mm

$ 14.89

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1.87ctw Yellow Morganite, Oval, VS

1.87ctw Yellow Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 66.90

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36.10ct Multicolor Jasper, Baguette, Opaque

36.10ct Multicolor Jasper, Baguette, Opaque

25 x 20.8 mm

$ 39.55

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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 -> 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 -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate
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