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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
Untreated Gemstones Price
Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
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33.81ct Multicolor Jasper, Pear Shape, Opaque

33.81ct Multicolor Jasper, Pear Shape, Opaque

29.1 x 25.1 mm

$ 20.73

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1.51ct Pink Morganite, Pear Shape, VS

1.51ct Pink Morganite, Pear Shape, VS

9.6 x 6.3 mm

$ 115.80

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2.86ct Green Malachite, Oval, Opaque

2.86ct Green Malachite, Oval, Opaque

10 x 8 mm (calibrated)

$ 2.85

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1.76ct Orange Hessonite Garnet, Emerald Cut, SI

1.76ct Orange Hessonite Garnet, Emerald Cut, SI

7 x 5 mm (calibrated)

$ 34.71

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5.43ctw Green Prehnite, Oval, Transparent/Translucent

5.43ctw Green Prehnite, Oval, Transparent/Translucent

8.9 x 6.7 mm

$ 13.39

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23.05ct Orange Spessartite Garnet, Oval, Translucent
Spessartite Garnet Product Video (749875)

23.05ct Orange Spessartite Garnet, Oval, Translucent

16.9 x 13.9 mm

$ 573.95

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30.20ctw White Howlite, Sphere / Ball, Opaque

30.20ctw White Howlite, Sphere / Ball, Opaque

13 mm (calibrated)

$ 17.20

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44.66ct Multicolor Jasper, Oval, Opaque

44.66ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 36.70

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12.90ct Violet Amethyst, Cushion, VVS

12.90ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 102.79

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1.23ct Purple Spinel, Cushion, VS

1.23ct Purple Spinel, Cushion, VS

6.6 x 5.9 mm

$ 86.67

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0.28ct Violet Iolite, Pear Shape, VS

0.28ct Violet Iolite, Pear Shape, VS

6 x 4 mm (calibrated)

$ 11.16

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6.33ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (472001)

6.33ct Turquoise Grandidierite, Oval, Translucent

14 x 10 mm (calibrated)

$ 1,387.03

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6.05ct Yellow Citrine, Briolette, VVS-VS

6.05ct Yellow Citrine, Briolette, VVS-VS

16.2 x 7.9 mm

$ 32.62

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4.48ct Pink Strawberry Quartz, Oval, Translucent

4.48ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 53.54

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16.81ct Multicolor Jasper, Fancy, Opaque

16.81ct Multicolor Jasper, Fancy, Opaque

18.2 x 18.7 mm

$ 14.18

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3.40ct Yellow Citrine, Oval, VVS-VS

3.40ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 18.63

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23.61ct Violet Charoite, Fancy, Opaque

23.61ct Violet Charoite, Fancy, Opaque

25.1 x 19.4 mm

$ 39.03

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1.41ct Orange Hessonite Garnet, Square, VS-SI

1.41ct Orange Hessonite Garnet, Square, VS-SI

6 x 6 mm (calibrated)

$ 23.70

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72.09ct Green Uvarovite Garnet Drusy, Fancy, Opaque
Uvarovite Garnet Drusy Product Video (744230)

72.09ct Green Uvarovite Garnet Drusy, Fancy, Opaque

36.1 x 33.7 mm

$ 234.55

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0.59ct Orange Spessartite Garnet, Oval, VS-SI

0.59ct Orange Spessartite Garnet, Oval, VS-SI

5.2 x 4.2 mm

$ 20.57

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3.67ct Pink Morganite, Oval, Translucent

3.67ct Pink Morganite, Oval, Translucent

11.5 x 9 mm

$ 40.21

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27.57ctw Multicolor Fossil Coral, Oval, Opaque

27.57ctw Multicolor Fossil Coral, Oval, Opaque

24.3 x 13.8 mm

$ 34.43

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0.46ct Yellow Citrine, Oval, VVS-VS

0.46ct Yellow Citrine, Oval, VVS-VS

6.3 x 4.1 mm

$ 3.20

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8.66ct Brown Tiger'S Eye, Oval, Opaque

8.66ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 8.62

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

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
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Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

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

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Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
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Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
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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
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