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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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Yellow Untreated Gemstones
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0.71ct Multicolor Labradorite, Round, Translucent

0.71ct Multicolor Labradorite, Round, Translucent

5 mm (calibrated)

$ 1.73

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14.65ct Multicolor Labradorite, Round, Translucent
Labradorite Product Video (685285)

14.65ct Multicolor Labradorite, Round, Translucent

19 mm (calibrated)

$ 17.51

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3.02ctw Yellow Citrine, Emerald Cut, VS

3.02ctw Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 20.98

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1.93ctw Orange Sunstone, Oval, Translucent

1.93ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 13.45

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20.00ct Bi-Color Ametrine, Oval, VS

20.00ct Bi-Color Ametrine, Oval, VS

20 x 15 mm (calibrated)

$ 153.38

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2.66ct Brown Tiger'S Eye, Round, Opaque

2.66ct Brown Tiger'S Eye, Round, Opaque

8 mm (calibrated)

$ 2.65

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5.46ct Brown Smoky Quartz, Emerald Cut, VVS

5.46ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 22.91

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9.02ct Pink Rose Quartz, Flower Cut, Transparent

9.02ct Pink Rose Quartz, Flower Cut, Transparent

15 x 15 mm (calibrated)

$ 19.76

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1.90ct Orange Hessonite Garnet, Emerald Cut, SI

1.90ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 35.64

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1.24ct Yellow Beryl, Round, VVS-VS

1.24ct Yellow Beryl, Round, VVS-VS

7 mm (calibrated)

$ 27.17

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10.53ct Multicolor Agate, Sphere / Ball, Opaque
Agate Product Video (701051)

10.53ct Multicolor Agate, Sphere / Ball, Opaque

11 mm (calibrated)

$ 8.38

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1.33ct Green Tourmaline, Emerald Cut, VS-SI

1.33ct Green Tourmaline, Emerald Cut, VS-SI

13.7 x 3.2 mm

$ 28.13

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0.58ct Orange Sphalerite, Round, SI

0.58ct Orange Sphalerite, Round, SI

4.7 mm

$ 28.88

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1.68ctw Red Pyrope Garnet, Heart, VVS-VS

1.68ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.89

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1.81ct Yellow Citrine, Trillion, VVS-VS

1.81ct Yellow Citrine, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 11.21

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0.15ctw White Diamond, Round, VVS-VS

0.15ctw White Diamond, Round, VVS-VS

2.6 mm (calibrated)

$ 268.16

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31.42ct Violet Amethyst, Oval, VVS
Amethyst Product Video (680001)

31.42ct Violet Amethyst, Oval, VVS

21.8 x 17.1 mm

$ 250.35

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0.88ct Orange Zircon, Oval, VS

0.88ct Orange Zircon, Oval, VS

6 x 5 mm

$ 13.15

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29.35ct Green Maw-Sit-Sit, Oval, Opaque

29.35ct Green Maw-Sit-Sit, Oval, Opaque

21.2 x 16.8 mm

$ 96.47

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1.32ct Orange Moonstone, Marquise, Translucent

1.32ct Orange Moonstone, Marquise, Translucent

10 x 5 mm (calibrated)

$ 2.63

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1.07ct Blue Kyanite, Oval, SI

1.07ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 26.64

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1.06ct Green Tourmaline, Emerald Cut, VVS-VS

1.06ct Green Tourmaline, Emerald Cut, VVS-VS

12.3 x 3.2 mm

$ 52.79

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3.30ctw Green Tsavorite Garnet, Pear Shape, VS

3.30ctw Green Tsavorite Garnet, Pear Shape, VS

5.1 x 2.9 mm

$ 174.01

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2.10ctw Yellow Citrine, Square, VS

2.10ctw Yellow Citrine, Square, VS

6 x 6 mm (calibrated)

$ 13.94

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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 -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

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

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 -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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