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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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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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14.01ct White Agate, Round, Opaque

14.01ct White Agate, Round, Opaque

16 mm (calibrated)

$ 22.19

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0.99ct Yellow Beryl, Oval, VVS

0.99ct Yellow Beryl, Oval, VVS

8 x 6 mm (calibrated)

$ 19.72

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72.72ct Multicolor Rhodochrosite, Pear Shape, Translucent
Rhodochrosite Product Video (472230)

72.72ct Multicolor Rhodochrosite, Pear Shape, Translucent

43 x 20.3 mm

$ 125.89

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1.78ct Orange Hessonite Garnet, Oval, VS-SI

1.78ct Orange Hessonite Garnet, Oval, VS-SI

7.9 x 6.6 mm

$ 35.46

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41.22ct Green Bloodstone, Oval, Opaque

41.22ct Green Bloodstone, Oval, Opaque

28.6 x 21.2 mm

$ 61.59

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1.57ctw Multicolor Andalusite, Oval, VS

1.57ctw Multicolor Andalusite, Oval, VS

5 x 3 mm (calibrated)

$ 83.87

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0.92ct Green Peridot, Oval, VS

0.92ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.42

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0.62ct Violet Amethyst, Marquise, VVS-VS

0.62ct Violet Amethyst, Marquise, VVS-VS

8.1 x 4.2 mm

$ 4.12

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4.90ct Orange Sunstone, Oval, Translucent

4.90ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 29.15

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2.49ctw Violet Amethyst, Oval, VVS-VS

2.49ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.65

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1.58ctw Red Rhodolite Garnet, Square, VS

1.58ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.83

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9.43ct White Rainbow Moonstone, Pear Shape, Translucent

9.43ct White Rainbow Moonstone, Pear Shape, Translucent

18.9 x 10.1 mm

$ 65.74

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32.77ct Multicolor Jasper, Cushion, Opaque

32.77ct Multicolor Jasper, Cushion, Opaque

31.3 x 20.2 mm

$ 22.63

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5.91ct Purple Kunzite, Pear Shape, VVS-VS

5.91ct Purple Kunzite, Pear Shape, VVS-VS

12.9 x 8.4 mm

$ 147.16

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1.64ct Green Prehnite, Oval, Transparent/Translucent

1.64ct Green Prehnite, Oval, Transparent/Translucent

7.4 x 7 mm

$ 8.17

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3.68ctw Brown Smoky Quartz, Round, VS

3.68ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 8.07

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2.07ct Orange Hessonite Garnet, Oval, VVS-VS

2.07ct Orange Hessonite Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 30.87

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36.84ctw Gray Hematite, Emerald Cut, Opaque

36.84ctw Gray Hematite, Emerald Cut, Opaque

20 x 15 mm (calibrated)

$ 32.66

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1.28ct Pink Tourmaline, Oval, Transparent

1.28ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 21.21

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9.83ct Black Nuummite, Oval, Opaque

9.83ct Black Nuummite, Oval, Opaque

14 x 12 mm (calibrated)

$ 40.34

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22.49ctw Black Spinel, Oval, Opaque

22.49ctw Black Spinel, Oval, Opaque

16 x 12 mm (calibrated)

$ 73.92

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6.31ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

6.31ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

18.5 x 10.9 mm

$ 18.86

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1.02ct Pink Spinel, Oval, VS
Spinel Product Video (752652)

1.02ct Pink Spinel, Oval, VS

6.5 x 5 mm

$ 507.96

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3.08ct Violet Amethyst, Trillion, VS

3.08ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.47

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

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate
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