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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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0.51ct Pink Morganite, Pear Shape, VS

0.51ct Pink Morganite, Pear Shape, VS

7 x 5 mm (calibrated)

$ 22.86

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0.51ct Pink Tourmaline, Round, Transparent

0.51ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 20.32

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0.77ct Yellow Color-Change Diaspore, Cushion, VS

0.77ct Yellow Color-Change Diaspore, Cushion, VS

7.4 x 4.2 mm

$ 26.99

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0.57ct Pink Tourmaline, Round, Transparent

0.57ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 22.71

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7.35ct Yellow Citrine, Briolette, VVS

7.35ct Yellow Citrine, Briolette, VVS

15.7 x 8.9 mm

$ 41.48

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1.10ct Yellow Color-Change Diaspore, Cushion, VS

1.10ct Yellow Color-Change Diaspore, Cushion, VS

7.5 x 5.1 mm

$ 44.88

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1.43ct Orange Hessonite Garnet, Square, SI

1.43ct Orange Hessonite Garnet, Square, SI

6 x 6 mm (calibrated)

$ 24.05

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1.05ct Yellow Color-Change Diaspore, Pear Shape, VS

1.05ct Yellow Color-Change Diaspore, Pear Shape, VS

6.9 x 5.6 mm

$ 54.95

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0.35ct Green Tourmaline, Baguette, VVS

0.35ct Green Tourmaline, Baguette, VVS

6.5 x 2.7 mm

$ 12.20

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3.90ct Yellow Citrine, Oval, VVS-VS

3.90ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 29.91

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16.70ct Green Malachite, Baguette, Opaque

16.70ct Green Malachite, Baguette, Opaque

14.1 x 11.1 mm

$ 19.94

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3.21ctw Yellow Golden Beryl, Oval, VVS-VS

3.21ctw Yellow Golden Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 70.33

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0.62ct Orange Zircon, Oval, VVS

0.62ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 9.26

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32.02ct Bi-Color Ametrine, Pear Shape, VS
Ametrine Product Video (588904)

32.02ct Bi-Color Ametrine, Pear Shape, VS

24.9 x 20.5 mm

$ 210.49

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0.93ct Pink Strawberry Quartz, Oval, Translucent

0.93ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 11.75

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3.23ct Yellow Citrine, Oval, VVS-VS

3.23ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 24.77

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1.28ctw Green Demantoid Garnet, Oval, VS-SI

1.28ctw Green Demantoid Garnet, Oval, VS-SI

4.9 x 3.8 mm

$ 140.24

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2.10ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.10ctw White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.91

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8.68ct Pink Strawberry Quartz, Oval, Translucent

8.68ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 52.12

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10.09ct Green Jadeite, Oval, Translucent

10.09ct Green Jadeite, Oval, Translucent

18 x 13 mm (calibrated)

$ 33.17

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10.11ctw Yellow Citrine, Oval, VVS-VS
Citrine Product Video (715732)

10.11ctw Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 80.56

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16.78ct Violet Amethyst, Pear Shape, VVS

16.78ct Violet Amethyst, Pear Shape, VVS

21.2 x 16.1 mm

$ 116.99

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12.96ct Violet Amethyst, Cushion, VVS-VS

12.96ct Violet Amethyst, Cushion, VVS-VS

16 x 16 mm (calibrated)

$ 103.27

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47.77ct Green Amazonite, Oval, Opaque

47.77ct Green Amazonite, Oval, Opaque

33.7 x 22.5 mm

$ 38.06

View Gem
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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

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

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 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
→ View All GemSelect Reviews on Bizrate
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