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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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37.08ct Gray Hematite, Pear Shape, Opaque

37.08ct Gray Hematite, Pear Shape, Opaque

25 x 18 mm (calibrated)

$ 36.15

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2.10ct Orange Hessonite Garnet, Oval, VS-SI

2.10ct Orange Hessonite Garnet, Oval, VS-SI

8.5 x 7 mm

$ 37.06

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1.76ct Green Tourmaline, Emerald Cut, VVS-VS

1.76ct Green Tourmaline, Emerald Cut, VVS-VS

18.4 x 3.4 mm

$ 42.42

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1.09ct Brown Kornerupine, Baguette, VVS

1.09ct Brown Kornerupine, Baguette, VVS

5.4 x 4.8 mm

$ 90.47

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10.81ctw White Dendritic Agate, Pear Shape, Opaque

10.81ctw White Dendritic Agate, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 8.62

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0.84ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.84ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 4.2 mm

$ 2.76

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2.71ctw Green Peridot, Round, VVS-VS

2.71ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 44.54

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1.51ct Orange Hessonite Garnet, Oval, VVS-VS

1.51ct Orange Hessonite Garnet, Oval, VVS-VS

7.4 x 5.8 mm

$ 30.08

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9.41ct Multicolor Boulder Opal, Cushion, Opaque

9.41ct Multicolor Boulder Opal, Cushion, Opaque

13.7 x 10.9 mm

$ 46.86

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1.61ct Pink Morganite, Round, VS

1.61ct Pink Morganite, Round, VS

8 mm (calibrated)

$ 88.20

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29.01ct Violet Charoite, Pear Shape, Opaque

29.01ct Violet Charoite, Pear Shape, Opaque

32.5 x 18.5 mm

$ 47.97

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3.67ct Green Jade, Oval, Opaque

3.67ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 7.31

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3.65ctw Multicolor Spectrolite, Oval, Opaque

3.65ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 16.68

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3.02ctw Yellow Citrine, Emerald Cut, VS

3.02ctw Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 20.98

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40.92ct Multicolor Pietersite, Oval, Opaque
Pietersite Product Video (447924)

40.92ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 134.50

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3.18ctw White Rainbow Moonstone, Pear Shape, Transparent

3.18ctw White Rainbow Moonstone, Pear Shape, Transparent

4.9 x 4.7 mm

$ 69.68

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4.72ctw Pink Rose Quartz, Emerald Cut, Transparent

4.72ctw Pink Rose Quartz, Emerald Cut, Transparent

8.5 x 8.5 mm

$ 25.85

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2.47ctw Red Pyrope Garnet, Marquise, VVS-VS

2.47ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.1 mm

$ 21.65

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0.99ct Green Peridot, Emerald Cut, VS

0.99ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 14.79

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4.54ct Violet Amethyst, Pear Shape, VS

4.54ct Violet Amethyst, Pear Shape, VS

14 x 10 mm (calibrated)

$ 32.98

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9.43ct Multicolor Pietersite, Oval, Opaque

9.43ct Multicolor Pietersite, Oval, Opaque

24.8 x 12.2 mm

$ 23.11

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1.63ct Orange Citrine, Oval, VS

1.63ct Orange Citrine, Oval, VS

9 x 7 mm (calibrated)

$ 16.23

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60.57ct Multicolor Jasper, Oval, Opaque
Jasper Product Video (392239)

60.57ct Multicolor Jasper, Oval, Opaque

35.2 x 23.3 mm

$ 66.37

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14.86ctw Yellow Citrine, Emerald Cut, VVS

14.86ctw Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 95.57

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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 love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate
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