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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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8.15ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

8.15ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 24.35

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8.26ct Multicolor Agate, Oval, Opaque

8.26ct Multicolor Agate, Oval, Opaque

12 x 12 mm (calibrated)

$ 8.23

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2.85ctw Green Peridot, Square, VS

2.85ctw Green Peridot, Square, VS

5 x 5 mm (calibrated)

$ 31.22

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5.66ctw Pink Moonstone, Flower Cut, Translucent

5.66ctw Pink Moonstone, Flower Cut, Translucent

9.6 x 9.5 mm

$ 24.80

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0.58ct Yellow Citrine, Trillion, VVS-VS

0.58ct Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 4.81

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2.39ct Yellow Citrine, Flower Cut, Transparent

2.39ct Yellow Citrine, Flower Cut, Transparent

9 x 8.4 mm

$ 18.33

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4.93ctw White Topaz, Cushion, VVS-VS

4.93ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 27.01

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2.80ct Red Sunstone, Oval, Translucent

2.80ct Red Sunstone, Oval, Translucent

10 x 8 mm (calibrated)

$ 21.47

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27.58ct Multicolor Quartz With Marcasite, Oval, Transparent
Quartz With Marcasite Product Video (524016)

27.58ct Multicolor Quartz With Marcasite, Oval, Transparent

28.1 x 16.9 mm

$ 181.31

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2.79ct Yellow Citrine, Oval, VVS-VS

2.79ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 21.40

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2.68ctw Red Pyrope Garnet, Marquise, VVS-VS

2.68ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.2 mm

$ 23.49

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24.38ct Violet Kunzite, Marquise, VVS-VS
Kunzite Product Video (409278)

24.38ct Violet Kunzite, Marquise, VVS-VS

31.8 x 10.3 mm

$ 485.65

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1.91ct Multicolor Opal, Pear Shape, Translucent

1.91ct Multicolor Opal, Pear Shape, Translucent

12 x 8.9 mm

$ 83.71

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8.93ctw Black Spinel, Round, Opaque

8.93ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 34.25

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2.19ct Yellow Golden Beryl, Oval, VVS-VS

2.19ct Yellow Golden Beryl, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 59.99

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0.88ct Pink Tourmaline, Emerald Cut, SI

0.88ct Pink Tourmaline, Emerald Cut, SI

7.3 x 4.5 mm

$ 66.52

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0.98ct Yellow Citrine, Round, VS

0.98ct Yellow Citrine, Round, VS

7 mm (calibrated)

$ 6.51

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2.30ct Multicolor Labradorite, Pear Shape, Translucent

2.30ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.09

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3.24ct Violet Amethyst, Round, VVS

3.24ct Violet Amethyst, Round, VVS

10 mm (calibrated)

$ 24.85

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0.27ct Green Kornerupine, Baguette, VVS

0.27ct Green Kornerupine, Baguette, VVS

5.1 x 2.8 mm

$ 14.79

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8.96ct Pink Kunzite, Fancy, VS
Kunzite Product Video (710473)

8.96ct Pink Kunzite, Fancy, VS

15.9 x 10.7 mm

$ 236.49

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0.07ct White Diamond, Marquise, VVS

0.07ct White Diamond, Marquise, VVS

4.1 x 2.1 mm

$ 243.29

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1.87ct Green Tourmaline, Emerald Cut, VVS

1.87ct Green Tourmaline, Emerald Cut, VVS

23 x 3.4 mm

$ 61.46

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3.07ct Multicolor Opal, Oval, Transparent

3.07ct Multicolor Opal, Oval, Transparent

13.5 x 10.1 mm

$ 76.44

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

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

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

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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