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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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2.40ct Green Prehnite, Oval, Transparent/Translucent

2.40ct Green Prehnite, Oval, Transparent/Translucent

9.2 x 7.9 mm

$ 7.10

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21.82ct Violet Amethyst, Emerald Cut, VVS

21.82ct Violet Amethyst, Emerald Cut, VVS

20 x 15 mm (calibrated)

$ 152.13

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1.00ctw Red Pyrope Garnet, Square, VVS-VS

1.00ctw Red Pyrope Garnet, Square, VVS-VS

4.2 x 4.2 mm

$ 7.67

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2.30ct Green Peridot, Cushion, VS

2.30ct Green Peridot, Cushion, VS

9 x 7 mm (calibrated)

$ 91.14

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35.03ct Multicolor Jasper, Oval, Opaque

35.03ct Multicolor Jasper, Oval, Opaque

31.4 x 20.3 mm

$ 28.02

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12.98ct Violet Amethyst, Cushion, VVS
Amethyst Product Video (715754)

12.98ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 103.43

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8.08ct Multicolor Amethyst Geode Slice, Fancy, Transparent

8.08ct Multicolor Amethyst Geode Slice, Fancy, Transparent

18 x 13 mm (calibrated)

$ 8.62

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11.45ct Blue Color-Change Fluorite, Round, VS
Color-Change Fluorite Product Video (413715)

11.45ct Blue Color-Change Fluorite, Round, VS

14 mm (calibrated)

$ 313.62

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0.53ct Green Peridot, Baguette, VVS-VS

0.53ct Green Peridot, Baguette, VVS-VS

5.9 x 3.8 mm

$ 7.92

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45.08ct Multicolor Jasper, Oval, Opaque

45.08ct Multicolor Jasper, Oval, Opaque

30.1 x 25 mm

$ 23.22

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6.29ctw Brown Moonstone, Flower Cut, Translucent

6.29ctw Brown Moonstone, Flower Cut, Translucent

11 x 11 mm (calibrated)

$ 27.57

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0.81ct Yellow Morganite, Cushion, VS

0.81ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 44.37

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3.10ctw Pink Strawberry Quartz, Oval, Transparent

3.10ctw Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 16.37

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2.03ct Orange Hessonite Garnet, Emerald Cut, VS

2.03ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 7 mm (calibrated)

$ 30.19

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34.99ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

34.99ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

30 x 22 mm (calibrated)

$ 15.69

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1.58ct Green Tourmaline, Emerald Cut, VVS

1.58ct Green Tourmaline, Emerald Cut, VVS

18.3 x 3.3 mm

$ 43.28

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0.80ct Gray Spinel, Cushion, VS

0.80ct Gray Spinel, Cushion, VS

5.3 x 5.2 mm

$ 59.76

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5.18ct Violet Amethyst, Oval, Transparent

5.18ct Violet Amethyst, Oval, Transparent

12 x 10 mm (calibrated)

$ 30.31

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1.03ct Red Rhodolite Garnet, Oval, VS-SI

1.03ct Red Rhodolite Garnet, Oval, VS-SI

6.7 x 5.1 mm

$ 27.36

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0.87ct Yellow Citrine, Oval, Transparent

0.87ct Yellow Citrine, Oval, Transparent

10.1 x 4.1 mm

$ 6.07

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3.61ctw Red Pyrope Garnet, Marquise, VVS-VS

3.61ctw Red Pyrope Garnet, Marquise, VVS-VS

11.9 x 5.9 mm

$ 31.64

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0.18ctw White Diamond, Round, VVS-VS

0.18ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 321.79

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2.95ctw Multicolor Andalusite, Oval, VS

2.95ctw Multicolor Andalusite, Oval, VS

6 x 4 mm (calibrated)

$ 158.17

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3.30ctw Green Tsavorite Garnet, Pear Shape, VS

3.30ctw Green Tsavorite Garnet, Pear Shape, VS

4.8 x 2.9 mm

$ 180.77

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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

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

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
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
→ View All GemSelect Reviews on Bizrate
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