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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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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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29.19ct Red Star Garnet, Oval, Opaque

16.8 x 14.3 mm

$ 28.78

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2.10ct Red Almandine Garnet, Oval, VVS

9 x 7 mm (calibrated)

$ 78.44

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8.23ct Green Prehnite, Fancy, Transparent

17.8 x 12.4 mm

$ 9.55

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27.16ct Multicolor Agate, Fancy, Opaque

21.2 x 12.3 mm

$ 47.57

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4.42ct Brown Smoky Quartz, Round, VVS-VS

11 mm (calibrated)

$ 7.26

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0.50ct Yellow Citrine, Cushion, VVS-VS

5 x 5 mm (calibrated)

$ 3.74

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3.06ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 21.33

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25.87ct Gray Hematite, Marquise, Opaque

28.3 x 12.7 mm

$ 26.08

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5.27ct Multicolor Pietersite, Oval, Opaque

14 x 10 mm (calibrated)

$ 12.76

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1.11ct Multicolor Opal, Pear Shape, Transparent

12 x 7.1 mm

$ 49.75

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0.35ct Pink Morganite, Round, VS

5 mm (calibrated)

$ 14.53

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1.98ct Green Fluorite, Pear Shape, Transparent

10.1 x 5.8 mm

$ 7.89

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7.96ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 34.88

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43.74ct Multicolor Coral, Oval, Opaque

33.6 x 23.9 mm

$ 47.92

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0.87ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 13.00

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1.98ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 35.50

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4.17ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 2.45

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7.98ctw Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 17.65

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1.57ct Pink Tourmaline, Round, Transparent

7 mm (calibrated)

$ 26.91

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34.01ct Multicolor Labradorite, Oval, Opaque

33.9 x 20.4 mm

$ 30.49

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1.41ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 26.68

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59.70ct Brown Tiger'S Eye, Oval, Opaque

34.8 x 24.8 mm

$ 27.47

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8.25ct Brown Tiger'S Eye, Oval, Opaque

14 x 12 mm (calibrated)

$ 8.22

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1.82ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

6.9 x 5.2 mm

$ 5.74

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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

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 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

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate
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