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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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1.08ct Purple Spinel, Cushion, VS

1.08ct Purple Spinel, Cushion, VS

5.9 x 5.2 mm

$ 129.08

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0.69ct Green Peridot, Oval, VVS-VS

0.69ct Green Peridot, Oval, VVS-VS

6.5 x 4.9 mm

$ 9.62

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2.77ct Pink Tourmaline, Emerald Cut, VVS-VS

2.77ct Pink Tourmaline, Emerald Cut, VVS-VS

9.5 x 6.3 mm

$ 209.40

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13.18ct White Rainbow Moonstone, Pear Shape, Translucent

13.18ct White Rainbow Moonstone, Pear Shape, Translucent

18.3 x 14.2 mm

$ 91.89

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3.23ctw White Topaz, Cushion, VVS-VS

3.23ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 17.70

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22.77ctw Black Spinel, Oval, Opaque

22.77ctw Black Spinel, Oval, Opaque

16 x 12 mm (calibrated)

$ 69.09

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0.92ct Pink Morganite, Pear Shape, VVS

0.92ct Pink Morganite, Pear Shape, VVS

10.4 x 5.1 mm

$ 80.63

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3.24ctw Yellow Citrine, Emerald Cut, VVS-VS

3.24ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 20.46

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1.57ct Orange Hessonite Garnet, Oval, VS

1.57ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.4 mm

$ 31.27

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11.66ct Multicolor Cinnabar, Round, Opaque

11.66ct Multicolor Cinnabar, Round, Opaque

19 mm (calibrated)

$ 13.65

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0.53ct Pink Tourmaline, Round, Transparent

0.53ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 21.12

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1.30ct Violet Amethyst, Marquise, VS

1.30ct Violet Amethyst, Marquise, VS

12 x 5.9 mm

$ 9.97

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23.17ctw Multicolor Labradorite, Round, Opaque

23.17ctw Multicolor Labradorite, Round, Opaque

20 mm (calibrated)

$ 50.76

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1.25ct Blue Kyanite, Oval, SI

1.25ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 31.13

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0.60ct Green Tourmaline, Baguette, VVS-VS

0.60ct Green Tourmaline, Baguette, VVS-VS

7 x 3.7 mm

$ 16.37

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7.98ct Violet Amethyst, Pear Shape, VVS-VS

7.98ct Violet Amethyst, Pear Shape, VVS-VS

18 x 13 mm (calibrated)

$ 62.78

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4.87ctw Orange Sunstone, Round, Translucent

4.87ctw Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 28.82

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98.13ct Orange Druzy Citrine, Fancy, Opaque

98.13ct Orange Druzy Citrine, Fancy, Opaque

36.9 x 34 mm

$ 48.14

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1.17ct Yellow Citrine, Round, VS

1.17ct Yellow Citrine, Round, VS

7 mm (calibrated)

$ 9.32

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12.01ct Green Maw-Sit-Sit, Round, Opaque

12.01ct Green Maw-Sit-Sit, Round, Opaque

14 mm (calibrated)

$ 37.11

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0.50ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.50ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.1 x 3.5 mm

$ 83.00

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1.27ctw Blue Kyanite, Oval, I1

1.27ctw Blue Kyanite, Oval, I1

6.5 x 4.3 mm

$ 27.83

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12.71ct Black Nuummite, Oval, Opaque

12.71ct Black Nuummite, Oval, Opaque

17.3 x 11.9 mm

$ 55.83

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0.73ct Yellow Citrine, Round, VVS

0.73ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 5.45

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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

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
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

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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