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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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Untreated Gemstones Treatment

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1.36ct Orange Hessonite Garnet, Baguette, VS

1.36ct Orange Hessonite Garnet, Baguette, VS

6.7 x 4.8 mm

$ 25.70

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0.90ct Green Peridot, Oval, VS

0.90ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.27

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1.76ct Orange Hessonite Garnet, Oval, VS

1.76ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.8 mm

$ 31.61

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2.96ctw Red Pyrope Garnet, Square, VS

2.96ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 32.86

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1.39ct Green Tourmaline, Oval, Transparent

1.39ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 17.72

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0.92ctw Red Pyrope Garnet, Square, VVS-VS

0.92ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 7.06

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0.52ct Green Tourmaline, Baguette, VVS-VS

0.52ct Green Tourmaline, Baguette, VVS-VS

7.8 x 3.4 mm

$ 25.90

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4.13ct Green Chrysoprase, Oval, Opaque

4.13ct Green Chrysoprase, Oval, Opaque

10.6 x 10 mm

$ 51.42

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3.38ct Multicolor Dendritic Agate, Oval, Transparent

3.38ct Multicolor Dendritic Agate, Oval, Transparent

14.7 x 13.8 mm

$ 12.01

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0.53ct Orange Sphalerite, Round, SI

0.53ct Orange Sphalerite, Round, SI

4.7 mm

$ 26.39

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19.74ct Orange Moonstone, Round, Translucent

19.74ct Orange Moonstone, Round, Translucent

16 mm (calibrated)

$ 32.77

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1.31ct Yellow Citrine, Emerald Cut, VVS

1.31ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 9.13

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7.53ct Multicolor Fire Agate, Fancy, Opaque

7.53ct Multicolor Fire Agate, Fancy, Opaque

12.8 x 11.6 mm

$ 59.06

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1.70ct Pink Strawberry Quartz, Round, Translucent

1.70ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 13.04

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4.72ct Yellow Citrine, Pear Shape, VS

4.72ct Yellow Citrine, Pear Shape, VS

14 x 10 mm (calibrated)

$ 36.20

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0.20ct Violet Iolite, Square, VVS

0.20ct Violet Iolite, Square, VVS

3.3 x 3.2 mm

$ 7.97

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3.08ctw Red Rhodolite Garnet, Square, VS

3.08ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 26.96

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2.30ct Pink Tourmaline, Emerald Cut, VS

2.30ct Pink Tourmaline, Emerald Cut, VS

9 x 6 mm (calibrated)

$ 113.39

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18.73ctw Multicolor Jasper, Oval, Opaque

18.73ctw Multicolor Jasper, Oval, Opaque

23.1 x 12.8 mm

$ 10.64

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0.96ct Yellow Color-Change Diaspore, Cushion, VVS-VS

0.96ct Yellow Color-Change Diaspore, Cushion, VVS-VS

6.6 x 4.9 mm

$ 50.68

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0.88ct Orange Zircon, Oval, VS

0.88ct Orange Zircon, Oval, VS

5.9 x 4.8 mm

$ 13.15

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2.54ct Yellow Apatite, Oval, VS

2.54ct Yellow Apatite, Oval, VS

10 x 8 mm (calibrated)

$ 130.79

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2.80ct Brown Tiger'S Eye, Oval, Opaque

2.80ct Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 2.79

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11.61ct Multicolor Agate, Oval, Opaque

11.61ct Multicolor Agate, Oval, Opaque

15.1 x 12.7 mm

$ 19.66

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

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
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

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 -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate
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