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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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16.76ct Multicolor Boulder Opal, Fancy, Opaque

16.76ct Multicolor Boulder Opal, Fancy, Opaque

29.1 x 12.2 mm

$ 83.46

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5.95ct Brown Tiger'S Eye, Baguette, Opaque

5.95ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 5.93

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2.87ctw Yellow Citrine, Pear Shape, VVS-VS

2.87ctw Yellow Citrine, Pear Shape, VVS-VS

8 x 5 mm (calibrated)

$ 19.81

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18.89ct Multicolor Cinnabar, Cushion, Opaque

18.89ct Multicolor Cinnabar, Cushion, Opaque

21.9 x 21.6 mm

$ 22.10

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4.96ctw Green Prehnite, Oval, Transparent

4.96ctw Green Prehnite, Oval, Transparent

8 x 7.1 mm

$ 27.17

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7.16ct White Rainbow Moonstone, Fancy, Transparent

7.16ct White Rainbow Moonstone, Fancy, Transparent

21.9 x 9.6 mm

$ 57.05

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1.84ct Purple Cat'S Eye Tourmaline, Oval, Translucent

1.84ct Purple Cat'S Eye Tourmaline, Oval, Translucent

8 x 6 mm (calibrated)

$ 274.90

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0.69ct Yellow Beryl, Oval, VVS

0.69ct Yellow Beryl, Oval, VVS

7 x 5 mm (calibrated)

$ 17.18

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5.13ctw Brown Rutile Topaz, Pear Shape, Transparent

5.13ctw Brown Rutile Topaz, Pear Shape, Transparent

11 x 7.9 mm

$ 106.45

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0.58ct Yellow Citrine, Cushion, VVS

0.58ct Yellow Citrine, Cushion, VVS

5 x 5 mm (calibrated)

$ 4.33

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9.71ct Multicolor Labradorite, Marquise, Translucent

9.71ct Multicolor Labradorite, Marquise, Translucent

20 x 10 mm (calibrated)

$ 21.47

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27.42ct Multicolor Jasper, Pear Shape, Opaque

27.42ct Multicolor Jasper, Pear Shape, Opaque

25.4 x 18.9 mm

$ 15.57

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25.07ct Multicolor Jasper, Oval, Opaque

25.07ct Multicolor Jasper, Oval, Opaque

34.6 x 16.5 mm

$ 27.47

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4.68ct Yellow Citrine, Oval, VVS-VS

4.68ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 35.90

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0.64ct Orange Zircon, Oval, VVS

0.64ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 9.56

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6.64ct Blue Hemimorphite Druzy, Fancy, Opaque

6.64ct Blue Hemimorphite Druzy, Fancy, Opaque

13.9 x 10.6 mm

$ 109.12

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8.42ctw Violet Amethyst, Oval, Transparent

8.42ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 46.12

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17.22ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

17.22ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

19.2 x 13.4 mm

$ 7.89

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12.86ctw Multicolor Pietersite, Round, Opaque
Pietersite Product Video (601387)

12.86ctw Multicolor Pietersite, Round, Opaque

14 mm (calibrated)

$ 56.78

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4.50ct Yellow Citrine, Emerald Cut, VVS-VS

4.50ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 34.51

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0.72ct Orange Citrine, Oval, VS-SI

0.72ct Orange Citrine, Oval, VS-SI

7 x 5 mm (calibrated)

$ 7.17

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0.74ct Yellow Citrine, Heart, Transparent

0.74ct Yellow Citrine, Heart, Transparent

6 x 6 mm (calibrated)

$ 5.16

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1.41ct Yellow Sphene, Oval, Transparent

1.41ct Yellow Sphene, Oval, Transparent

6.4 x 6.3 mm

$ 7.02

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3.21ctw Brown Smoky Quartz, Round, VS

3.21ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.03

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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

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 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

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
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
→ View All GemSelect Reviews on Bizrate
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