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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
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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.85ct Orange Moonstone, Square, Translucent

1.85ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 3.70

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4.13ct Pink Rose Quartz, Emerald Cut, Transparent

4.13ct Pink Rose Quartz, Emerald Cut, Transparent

10.4 x 10.2 mm

$ 22.63

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14.92ct Violet Amethyst, Emerald Cut, VS

14.92ct Violet Amethyst, Emerald Cut, VS

18 x 13 mm (calibrated)

$ 104.02

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19.51ct Bi-Color Ametrine, Oval, VVS
Ametrine Product Video (590711)

19.51ct Bi-Color Ametrine, Oval, VVS

18.5 x 14.3 mm

$ 97.16

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3.37ct Pink Tourmaline, Emerald Cut, VVS-VS
Tourmaline Product Video (508563)

3.37ct Pink Tourmaline, Emerald Cut, VVS-VS

13.5 x 5.2 mm

$ 239.99

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1.14ct Multicolor Opal, Oval, Translucent

1.14ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 37.47

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4.11ct Yellow Citrine, Oval, VVS

4.11ct Yellow Citrine, Oval, VVS

12 x 10 mm (calibrated)

$ 32.75

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1.79ct Orange Hessonite Garnet, Round, SI

1.79ct Orange Hessonite Garnet, Round, SI

7 mm (calibrated)

$ 33.33

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3.25ct Multicolor Labradorite, Baguette, Translucent

3.25ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 4.47

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0.88ct Orange Hessonite Garnet, Cushion, SI

0.88ct Orange Hessonite Garnet, Cushion, SI

5.2 x 5.2 mm

$ 17.35

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5.70ct Yellow Citrine, Oval, VVS

5.70ct Yellow Citrine, Oval, VVS

14 x 9.5 mm

$ 37.47

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2.93ct Multicolor Labradorite, Pear Shape, Translucent

2.93ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 6.47

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0.34ct Yellow Color-Change Diaspore, Oval, VVS-VS

0.34ct Yellow Color-Change Diaspore, Oval, VVS-VS

4.5 x 4 mm

$ 17.94

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1.31ct Yellow Chrysoberyl, Pear Shape, VVS
Chrysoberyl Product Video (366491)

1.31ct Yellow Chrysoberyl, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 152.65

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10.36ct Yellow Rutile Quartz, Oval, Transparent

10.36ct Yellow Rutile Quartz, Oval, Transparent

18 x 14.8 mm

$ 28.38

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2.94ct Yellow Citrine, Oval, VS

2.94ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 20.50

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4.42ct Black Star Diopside, Oval, Opaque

4.42ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 18.34

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2.91ctw Green Peridot, Round, VS

2.91ctw Green Peridot, Round, VS

6 mm (calibrated)

$ 28.44

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5.69ct Yellow Citrine, Oval, VVS-VS

5.69ct Yellow Citrine, Oval, VVS-VS

13.2 x 9.9 mm

$ 43.63

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1.18ct Green Tourmaline, Baguette, VVS

1.18ct Green Tourmaline, Baguette, VVS

7.8 x 4.2 mm

$ 41.13

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1.25ct Green Tourmaline, Emerald Cut, VS

1.25ct Green Tourmaline, Emerald Cut, VS

14.3 x 3.3 mm

$ 26.43

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10.67ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (333907)

10.67ct Multicolor Pietersite, Oval, Opaque

21.5 x 11.3 mm

$ 51.31

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7.02ctw Green Prehnite, Oval, Transparent
Prehnite Product Video (450177)

7.02ctw Green Prehnite, Oval, Transparent

7.1 x 5.4 mm

$ 76.91

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4.25ctw Violet Amethyst, Oval, VS

4.25ctw Violet Amethyst, Oval, VS

5 x 3 mm (calibrated)

$ 21.17

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 -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 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 -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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