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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
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Untreated Gemstones Treatment

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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.44ct Yellow Sphene, Oval, Transparent

6.9 x 6 mm

$ 7.17

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39.60ct Multicolor Moss Agate, Oval, Translucent

34.5 x 24.3 mm

$ 32.87

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8.76ct Violet Amethyst, Cushion, VVS

12.5 x 14.1 mm

$ 61.07

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27.99ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

27.5 x 18.4 mm

$ 12.55

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0.72ct Yellow Color-Change Garnet, Emerald Cut, VS

7 x 3.5 mm

$ 78.88

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16.52ct Multicolor Boulder Opal, Cushion, Opaque

19 x 14.8 mm

$ 115.18

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18.53ctw Multicolor Jasper, Trillion, Opaque

19 x 19 mm (calibrated)

$ 10.89

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3.18ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 38.89

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5.93ctw Green Prehnite, Pear Shape, Transparent

10.9 x 7.1 mm

$ 32.49

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49.04ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

35.8 x 23.6 mm

$ 48.85

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40.70ct Gray Hematite, Round, Opaque

21.7 mm

$ 39.68

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1.80ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 26.83

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1.42ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 56.57

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1.94ct Orange Hessonite Garnet, Oval, VS-SI

8.2 x 6.9 mm

$ 42.51

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1.22ctw Orange Zircon, Oval, VVS-VS

5.1 x 4.1 mm

$ 30.38

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1.18ct Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 28.20

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13.54ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 13.49

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3.53ctw Multicolor Spectrolite, Round, Opaque

8.5 mm (calibrated)

$ 16.43

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4.66ctw Green Tsavorite Garnet, Round, VS

2.1 mm (calibrated)

$ 170.18

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3.79ctw Green Prehnite, Oval, Transparent

8.3 x 6.9 mm

$ 20.77

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2.33ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 38.30

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0.84ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.86

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0.96ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.69

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13.59ct Multicolor Opal, Oval, Opaque

26.5 x 11.6 mm

$ 676.78

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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

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
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

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

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate
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