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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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Bi-color Untreated Gemstones
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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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6.43ct Blue Larimar, Oval, Opaque

6.43ct Blue Larimar, Oval, Opaque

12 x 10 mm (calibrated)

$ 76.25

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0.62ct Yellow Zircon, Oval, VVS

0.62ct Yellow Zircon, Oval, VVS

5 x 4 mm (calibrated)

$ 9.26

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0.73ctw Blue Kyanite, Oval, SI-I1

0.73ctw Blue Kyanite, Oval, SI-I1

5.1 x 3.3 mm

$ 15.99

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5.16ct Black Cat'S Eye Scapolite, Oval, Translucent

5.16ct Black Cat'S Eye Scapolite, Oval, Translucent

11 x 8.2 mm

$ 28.27

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14.51ctw Black Spinel, Heart, Opaque

14.51ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 72.26

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1.83ct Green Tourmaline, Emerald Cut, VVS-VS

1.83ct Green Tourmaline, Emerald Cut, VVS-VS

15.5 x 4 mm

$ 44.11

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7.40ct Yellow Citrine, Emerald Cut, VVS-VS

7.40ct Yellow Citrine, Emerald Cut, VVS-VS

14.4 x 10.5 mm

$ 51.59

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0.21ct Black Diamond, Square, Opaque

0.21ct Black Diamond, Square, Opaque

2.9 x 2.9 mm

$ 104.58

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1.45ct Pink Morganite, Round, VS

1.45ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 56.32

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7.68ctw Brown Tiger'S Eye, Oval, Opaque

7.68ctw Brown Tiger'S Eye, Oval, Opaque

12 x 8 mm (calibrated)

$ 9.56

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2.05ctw Orange Citrine, Heart, VS

2.05ctw Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 17.02

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0.26ct Violet Iolite, Baguette, VS

0.26ct Violet Iolite, Baguette, VS

5 x 3 mm (calibrated)

$ 10.36

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7.81ct Pink Rose Quartz, Square, Transparent

7.81ct Pink Rose Quartz, Square, Transparent

12 x 12 mm (calibrated)

$ 42.79

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4.32ct Violet Amethyst, Pear Shape, VVS-VS

4.32ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 28.39

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19.38ct Black Obsidian, Pear Shape, Opaque

19.38ct Black Obsidian, Pear Shape, Opaque

24 x 21.2 mm

$ 14.48

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0.60ct Orange Citrine, Oval, VVS-VS

0.60ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.98

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1.22ct Orange Hessonite Garnet, Oval, VVS-VS

1.22ct Orange Hessonite Garnet, Oval, VVS-VS

7 x 5.6 mm

$ 24.30

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23.32ct Violet Amethyst, Round, VVS-VS
Amethyst Product Video (692472)

23.32ct Violet Amethyst, Round, VVS-VS

20 mm (calibrated)

$ 162.59

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0.72ct Yellow Morganite, Cushion, VS

0.72ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 43.38

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37.65ct Multicolor Jasper, Oval, Opaque

37.65ct Multicolor Jasper, Oval, Opaque

32.5 x 24.7 mm

$ 27.64

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0.19ctw White Diamond, Round, VVS-VS

0.19ctw White Diamond, Round, VVS-VS

2.9 mm (calibrated)

$ 339.67

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2.76ct Pink Strawberry Quartz, Oval, Transparent

2.76ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 20.51

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23.18ct Multicolor Quartz With Marcasite, Square, Transparent

23.18ct Multicolor Quartz With Marcasite, Square, Transparent

19 x 19 mm (calibrated)

$ 152.38

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1.51ct Brown Diamond, Cushion, SI
Diamond Product Video (382116)

1.51ct Brown Diamond, Cushion, SI

6 x 6 mm (calibrated)

$ 3,526.94

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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

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
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
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