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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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Yellow Untreated Gemstones
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3.94ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 21.58

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1.61ct Orange Zircon, Emerald Cut, VVS

7 x 5.3 mm

$ 26.46

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1.60ct Orange Tourmaline, Oval, VVS-VS

7 x 6.4 mm

$ 239.04

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23.25ctw Yellow Rutile Quartz, Sphere / Ball, Transparent

12 mm (calibrated)

$ 25.48

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6.64ctw Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 36.37

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3.04ct Pink Spinel, Oval, VS-SI

9 x 7 mm (calibrated)

$ 5,046.40

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0.91ctw Green Peridot, Pear Shape, VVS-VS

6 x 4 mm (calibrated)

$ 7.25

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2.04ctw Orange Sunstone, Oval, Translucent

6 x 4 mm (calibrated)

$ 15.65

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4.84ct Violet Amethyst, Pear Shape, VVS

15 x 10 mm (calibrated)

$ 33.75

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17.62ct Black Tourmaline, Cushion, Opaque

17 x 12.9 mm

$ 62.65

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0.82ct Yellow Color-Change Diaspore, Square, VS

5 x 5 mm (calibrated)

$ 28.78

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3.56ctw Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 19.51

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12.24ct Multicolor Rainbow Pyrite, Baguette, Opaque

17.9 x 11.8 mm

$ 31.69

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1.04ct Yellow Citrine, Cushion, VS

8 x 6 mm (calibrated)

$ 7.77

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1.34ct Orange Hessonite Garnet, Oval, VS-SI

7.4 x 5.9 mm

$ 22.02

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4.47ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 34.28

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1.16ct Multicolor Opal, Pear Shape, Transparent

9.6 x 7.2 mm

$ 29.17

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60.47ct Blue Turquoise, Oval, Opaque

32.8 x 17.8 mm

$ 180.68

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8.08ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 31.96

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1.21ct Pink Tourmaline, Emerald Cut, VS-SI

9.2 x 4.1 mm

$ 91.47

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1.90ct Orange Coral, Oval, Opaque

11.6 x 5 mm

$ 312.25

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0.86ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

5.3 x 5.1 mm

$ 26.39

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5.69ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 28.34

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6.75ct Black Tourmaline, Oval, Opaque

12 x 10 mm (calibrated)

$ 33.62

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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 -> 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 -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 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

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 Tommy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate
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