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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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2.70ctw White Rainbow Moonstone, Square, Transparent

2.70ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 51.18

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1.45ct Yellow Citrine, Flower Cut, Transparent

1.45ct Yellow Citrine, Flower Cut, Transparent

8 x 8 mm (calibrated)

$ 11.12

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0.27ct Orange Sphalerite, Round, VS-SI

0.27ct Orange Sphalerite, Round, VS-SI

3.7 mm

$ 13.45

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1.36ct Green Tourmaline, Oval, Transparent

1.36ct Green Tourmaline, Oval, Transparent

7.3 x 5.5 mm

$ 22.54

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3.53ct Pink Kunzite, Emerald Cut, VVS-VS

3.53ct Pink Kunzite, Emerald Cut, VVS-VS

11.2 x 5.5 mm

$ 97.14

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0.84ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.84ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 4.2 mm

$ 2.76

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1.31ctw Yellow Citrine, Pear Shape, VS

1.31ctw Yellow Citrine, Pear Shape, VS

7 x 5 mm (calibrated)

$ 7.18

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0.56ct White Rainbow Moonstone, Baguette, Transparent

0.56ct White Rainbow Moonstone, Baguette, Transparent

6.1 x 4.1 mm

$ 19.52

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3.09ctw Yellow Citrine, Emerald Cut, VVS-VS

3.09ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 23.70

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2.16ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

2.16ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.81

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1.20ct Yellow Citrine, Round, VVS

1.20ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 9.56

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5.57ct Green Prehnite, Fancy, Translucent

5.57ct Green Prehnite, Fancy, Translucent

13.3 x 9.5 mm

$ 9.16

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6.46ctw Multicolor Opal, Round, Translucent
Opal Product Video (466388)

6.46ctw Multicolor Opal, Round, Translucent

8 mm (calibrated)

$ 198.17

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1.49ctw Yellow Citrine, Trillion, VS-SI

1.49ctw Yellow Citrine, Trillion, VS-SI

6 x 6 mm (calibrated)

$ 12.37

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1.68ctw Green Tsavorite Garnet, Square, VVS-VS

1.68ctw Green Tsavorite Garnet, Square, VVS-VS

1.9 x 1.8 mm

$ 130.38

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1.40ctw Red Rhodolite Garnet, Square, VS

1.40ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.26

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2.81ct Multicolor Pietersite, Trillion, Opaque

2.81ct Multicolor Pietersite, Trillion, Opaque

11.5 x 10.8 mm

$ 6.81

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6.25ct Multicolor Labradorite, Round, Translucent

6.25ct Multicolor Labradorite, Round, Translucent

11 mm (calibrated)

$ 13.45

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0.41ct Yellow Citrine, Heart, VVS

0.41ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.27

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16.82ct Multicolor Agate, Oval, Opaque

16.82ct Multicolor Agate, Oval, Opaque

17.9 x 14.5 mm

$ 16.75

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2.16ctw Yellow Citrine, Square, VVS-VS

2.16ctw Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 16.57

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0.34ct Yellow Citrine, Heart, VVS

0.34ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 2.71

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57.49ct Green Bloodstone, Oval, Opaque

57.49ct Green Bloodstone, Oval, Opaque

30 x 22 mm (calibrated)

$ 85.90

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3.54ct Yellow Rutile Quartz, Round, Transparent

3.54ct Yellow Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 9.65

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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

Excellent options

Posted By CJ in February, 2026
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Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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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
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Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate
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