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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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0.57ct Green Tourmaline, Baguette, VVS

0.57ct Green Tourmaline, Baguette, VVS

8 x 3 mm

$ 19.87

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3.39ctw Violet Amethyst, Heart, VS

3.39ctw Violet Amethyst, Heart, VS

6 x 6 mm (calibrated)

$ 18.58

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0.61ct Multicolor Labradorite, Pear Shape, Translucent

0.61ct Multicolor Labradorite, Pear Shape, Translucent

7 x 4.2 mm

$ 1.34

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3.52ct Multicolor Opal, Oval, Transparent

3.52ct Multicolor Opal, Oval, Transparent

14 x 10 mm (calibrated)

$ 88.49

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10.33ct Yellow Rutile Quartz, Pear Shape, Transparent

10.33ct Yellow Rutile Quartz, Pear Shape, Transparent

18 x 13 mm (calibrated)

$ 28.07

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13.37ctw Violet Chalcedony, Heart, Translucent

13.37ctw Violet Chalcedony, Heart, Translucent

12 x 12 mm (calibrated)

$ 26.63

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1.58ct Yellow Citrine, Trillion, VVS-VS

1.58ct Yellow Citrine, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 12.59

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0.45ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

0.45ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

5 x 4.5 mm

$ 13.45

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2.12ct Orange Hessonite Garnet, Oval, VS

2.12ct Orange Hessonite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 32.39

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4.59ctw Red Strawberry Quartz, Oval, Translucent

4.59ctw Red Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 70.41

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43.87ct White Rainbow Moonstone, Fancy, Opaque

43.87ct White Rainbow Moonstone, Fancy, Opaque

36.1 x 12.5 mm

$ 13.11

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0.84ct Blue Kyanite, Oval, SI

0.84ct Blue Kyanite, Oval, SI

6.4 x 4.3 mm

$ 18.41

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23.37ctw Multicolor Labradorite, Oval, Translucent

23.37ctw Multicolor Labradorite, Oval, Translucent

21.9 x 15.8 mm

$ 46.55

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5.77ct Yellow Citrine, Oval, VVS-VS

5.77ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 34.64

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0.66ct Pink Morganite, Pear Shape, VS

0.66ct Pink Morganite, Pear Shape, VS

8 x 5 mm (calibrated)

$ 57.85

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2.35ct Violet Amethyst, Pear Shape, VVS

2.35ct Violet Amethyst, Pear Shape, VVS

11.5 x 7.6 mm

$ 16.38

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0.75ct Green Tourmaline, Emerald Cut, VVS

0.75ct Green Tourmaline, Emerald Cut, VVS

12.9 x 2.8 mm

$ 24.65

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33.63ct Gray Hematite, Round, Opaque

33.63ct Gray Hematite, Round, Opaque

20 mm (calibrated)

$ 30.96

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5.28ct Yellow Citrine, Round, VVS

5.28ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 33.75

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0.93ct Orange Hessonite Garnet, Baguette, VS

0.93ct Orange Hessonite Garnet, Baguette, VS

6.5 x 4.7 mm

$ 17.56

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0.42ct Yellow Citrine, Heart, VVS-VS

0.42ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.34

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19.13ct Violet Amethyst, Cushion, VVS

19.13ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 133.37

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1.63ct Pink Morganite, Oval, VS

1.63ct Pink Morganite, Oval, VS

9 x 7 mm (calibrated)

$ 113.64

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0.39ct Yellow Citrine, Heart, VVS-VS

0.39ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.10

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

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 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

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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