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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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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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28.47ctw Multicolor Fossil Coral, Cushion, Opaque

28.47ctw Multicolor Fossil Coral, Cushion, Opaque

18.8 x 11.1 mm

$ 35.57

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0.80ct Orange Zircon, Oval, VVS

0.80ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 11.95

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4.22ct Yellow Citrine, Oval, VVS-VS

4.22ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 32.36

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4.72ct Yellow Citrine, Oval, VVS

4.72ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 28.34

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1.62ct Orange Hessonite Garnet, Round, VS-SI

1.62ct Orange Hessonite Garnet, Round, VS-SI

7 mm (calibrated)

$ 22.72

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3.95ctw Red Pyrope Garnet, Square, VS

3.95ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 30.30

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2.88ctw Orange Spessartite Garnet, Round, VS
Spessartite Garnet Product Video (436350)

2.88ctw Orange Spessartite Garnet, Round, VS

4.8 mm

$ 94.66

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1.00ct Yellow Citrine, Trillion, VVS-VS
Citrine Product Video (573267)

1.00ct Yellow Citrine, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 5.49

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1.65ct Brown Kornerupine, Pear Shape, VVS
Kornerupine Product Video (380740)

1.65ct Brown Kornerupine, Pear Shape, VVS

9.2 x 5.8 mm

$ 136.95

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1.44ct Red Rhodolite Garnet, Emerald Cut, VS

1.44ct Red Rhodolite Garnet, Emerald Cut, VS

5.6 x 5.1 mm

$ 53.78

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3.22ctw Yellow Citrine, Emerald Cut, VS

3.22ctw Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 25.66

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5.05ct Pink Kunzite, Pear Shape, VS

5.05ct Pink Kunzite, Pear Shape, VS

13 x 9 mm (calibrated)

$ 138.98

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3.98ctw Green Peridot, Round, VVS-VS

3.98ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 65.40

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4.90ctw Yellow Citrine, Oval, VS

4.90ctw Yellow Citrine, Oval, VS

10 x 8 mm (calibrated)

$ 26.84

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2.34ct Pink Kunzite, Emerald Cut, VVS-VS

2.34ct Pink Kunzite, Emerald Cut, VVS-VS

8.4 x 5.5 mm

$ 64.39

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0.95ct Pink Morganite, Round, VS

0.95ct Pink Morganite, Round, VS

6.5 mm (calibrated)

$ 36.90

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0.51ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.51ct Gray Cat'S Eye Alexandrite, Oval, Opaque

4.6 x 4.4 mm

$ 84.66

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1.04ct Blue Kyanite, Oval, VS-SI

1.04ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 22.79

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2.93ct Violet Amethyst, Trillion, VS

2.93ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 16.05

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22.34ct Green Opal, Pear Shape, Opaque

22.34ct Green Opal, Pear Shape, Opaque

27.1 x 18.5 mm

$ 47.84

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5.67ctw Multicolor Labradorite, Square, Transparent

5.67ctw Multicolor Labradorite, Square, Transparent

8 x 5 mm (calibrated)

$ 7.26

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0.90ct Yellow Color-Change Diaspore, Marquise, VVS-VS

0.90ct Yellow Color-Change Diaspore, Marquise, VVS-VS

10.9 x 4.4 mm

$ 44.37

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5.30ct Multicolor Pietersite, Pear Shape, Opaque

5.30ct Multicolor Pietersite, Pear Shape, Opaque

16.7 x 10.5 mm

$ 12.51

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23.22ct Multicolor Jasper, Fancy, Opaque

23.22ct Multicolor Jasper, Fancy, Opaque

33.5 x 9.2 mm

$ 13.99

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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 -> 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

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
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

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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