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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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20.65ct Multicolor Jasper, Cushion, Opaque

20.65ct Multicolor Jasper, Cushion, Opaque

25 x 18 mm (calibrated)

$ 17.07

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3.18ct Yellow Citrine, Oval, VVS

3.18ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 22.17

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7.51ct White Quartz Cat'S Eye, Round, Transparent

7.51ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 26.74

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1.59ct Green Tourmaline, Emerald Cut, VS

1.59ct Green Tourmaline, Emerald Cut, VS

16.4 x 3.4 mm

$ 41.82

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1.18ct Green Chrome Diopside, Marquise, VS-SI
Chrome Diopside Product Video (724713)

1.18ct Green Chrome Diopside, Marquise, VS-SI

10 x 5 mm (calibrated)

$ 29.38

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5.14ct Turquoise Grandidierite, Oval, VS-SI

5.14ct Turquoise Grandidierite, Oval, VS-SI

11.5 x 9.5 mm

$ 225.25

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10.85ct Green Tourmaline, Flower Cut, Translucent
Tourmaline Product Video (472642)

10.85ct Green Tourmaline, Flower Cut, Translucent

19.4 x 18.2 mm

$ 118.87

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9.80ct Blue Turquoise, Oval, Opaque

9.80ct Blue Turquoise, Oval, Opaque

14 x 12 mm (calibrated)

$ 30.54

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7.82ct Brown Star Sunstone, Oval, Opaque

7.82ct Brown Star Sunstone, Oval, Opaque

15 x 10 mm (calibrated)

$ 64.91

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3.74ctw Orange Zircon, Round, VS
Zircon Product Video (434474)

3.74ctw Orange Zircon, Round, VS

7 mm (calibrated)

$ 81.95

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14.73ct Blue Chalcedony, Pear Shape, Opaque

14.73ct Blue Chalcedony, Pear Shape, Opaque

23.1 x 16.5 mm

$ 36.69

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4.15ct Yellow Citrine, Emerald Cut, VVS

4.15ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 31.83

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1.20ct Green Peridot, Oval, VS

1.20ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 10.76

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7.89ct Turquoise Fluorite, Pear Shape, Transparent

7.89ct Turquoise Fluorite, Pear Shape, Transparent

13.4 x 11.7 mm

$ 33.63

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1.29ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.29ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 5 mm (calibrated)

$ 21.65

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17.22ct Violet Charoite, Fancy, Opaque

17.22ct Violet Charoite, Fancy, Opaque

23.5 x 13.9 mm

$ 28.48

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0.91ct Blue Kyanite, Oval, SI

0.91ct Blue Kyanite, Oval, SI

6.9 x 4.8 mm

$ 19.94

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12.27ct Blue Color-Change Fluorite, Round, VS
Color-Change Fluorite Product Video (445139)

12.27ct Blue Color-Change Fluorite, Round, VS

15 mm (calibrated)

$ 337.15

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0.04ct Black Diamond, Round, Opaque

0.04ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 13.70

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32.76ct Multicolor Jasper, Oval, Opaque

32.76ct Multicolor Jasper, Oval, Opaque

33.6 x 18.6 mm

$ 35.90

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1.96ctw Red Pyrope Garnet, Heart, VVS-VS

1.96ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 15.03

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8.61ct Multicolor Boulder Opal, Fancy, Opaque

8.61ct Multicolor Boulder Opal, Fancy, Opaque

17.9 x 11.9 mm

$ 35.73

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3.35ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

3.35ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 66.07

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2.78ct Yellow Citrine, Emerald Cut, VS

2.78ct Yellow Citrine, Emerald Cut, VS

9.4 x 9.3 mm

$ 15.23

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

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
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Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate
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