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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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1.35ctw Yellow Citrine, Heart, VVS-VS

1.35ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 9.41

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2.89ct Violet Amethyst, Trillion, VS

2.89ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 20.15

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0.55ct Green Peridot, Marquise, VS

0.55ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.22

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1.62ct Yellow Citrine, Pear Shape, VVS-VS

1.62ct Yellow Citrine, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 10.17

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7.50ctw Black Spinel, Round, Opaque
Spinel Product Video (552999)

7.50ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 32.87

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25.10ct Bi-Color Ametrine, Oval, VVS

25.10ct Bi-Color Ametrine, Oval, VVS

20.9 x 17.7 mm

$ 125.00

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0.68ct Pink Malaya Garnet, Round, VS
Malaya Garnet Product Video (498835)

0.68ct Pink Malaya Garnet, Round, VS

5 mm (calibrated)

$ 29.80

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7.18ct Brown Smoky Quartz, Round, VVS-VS

7.18ct Brown Smoky Quartz, Round, VVS-VS

13 mm (calibrated)

$ 10.72

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0.82ct Orange Hessonite Garnet, Emerald Cut, VS

0.82ct Orange Hessonite Garnet, Emerald Cut, VS

6.5 x 4.5 mm

$ 12.19

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55.34ct Multicolor Jasper, Oval, Opaque

55.34ct Multicolor Jasper, Oval, Opaque

39 x 23.5 mm

$ 34.55

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1.38ct Multicolor Opal, Oval, Transparent

1.38ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 34.50

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1.94ct Orange Hessonite Garnet, Oval, VS-SI

1.94ct Orange Hessonite Garnet, Oval, VS-SI

8.3 x 6.8 mm

$ 28.93

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22.82ctw Multicolor Fossil Coral, Cushion, Opaque

22.82ctw Multicolor Fossil Coral, Cushion, Opaque

16.9 x 12.8 mm

$ 29.50

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3.30ctw Brown Smoky Quartz, Round, VS

3.30ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.23

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0.93ct Yellow Beryl, Trillion, VVS

0.93ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 18.53

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0.75ct Yellow Color-Change Diaspore, Cushion, VS

0.75ct Yellow Color-Change Diaspore, Cushion, VS

6.1 x 5 mm

$ 24.65

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27.52ct Multicolor Jasper, Oval, Opaque

27.52ct Multicolor Jasper, Oval, Opaque

31.3 x 22.7 mm

$ 18.69

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1.27ct Green Tourmaline, Oval, Transparent

1.27ct Green Tourmaline, Oval, Transparent

7.4 x 5.6 mm

$ 21.05

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6.40ct Yellow Citrine, Oval, VVS

6.40ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 38.43

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2.57ct Green Tourmaline, Emerald Cut, VVS-VS

2.57ct Green Tourmaline, Emerald Cut, VVS-VS

19.2 x 4.1 mm

$ 70.40

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2.09ctw Green Demantoid Garnet, Oval, VS

2.09ctw Green Demantoid Garnet, Oval, VS

4 x 3 mm (calibrated)

$ 154.06

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13.71ctw Multicolor Labradorite, Oval, Translucent

13.71ctw Multicolor Labradorite, Oval, Translucent

18 x 13.7 mm

$ 30.04

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1.89ct Yellow Citrine, Oval, VVS-VS

1.89ct Yellow Citrine, Oval, VVS-VS

9 x 7.3 mm

$ 10.36

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7.31ct Green Actinolite Cat'S Eye, Oval, Translucent

7.31ct Green Actinolite Cat'S Eye, Oval, Translucent

14 x 12 mm (calibrated)

$ 50.96

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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

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
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Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate
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