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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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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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19.64ct Bi-Color Ametrine, Oval, VS

19.64ct Bi-Color Ametrine, Oval, VS

18.6 x 15.4 mm

$ 129.10

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3.46ctw Multicolor Opal, Square, Translucent

3.46ctw Multicolor Opal, Square, Translucent

4.1 x 3.7 mm

$ 24.56

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25.27ct Multicolor Jasper, Baguette, Opaque

25.27ct Multicolor Jasper, Baguette, Opaque

24.8 x 16.6 mm

$ 41.52

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1.74ct Green Tourmaline, Oval, VVS-VS

1.74ct Green Tourmaline, Oval, VVS-VS

8.2 x 7.7 mm

$ 202.19

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1.53ct Green Tourmaline, Oval, VS

1.53ct Green Tourmaline, Oval, VS

6.7 x 6.4 mm

$ 177.79

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4.38ct Yellow Citrine, Oval, VVS-VS

4.38ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 33.60

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0.99ct Blue Kyanite, Oval, VS

0.99ct Blue Kyanite, Oval, VS

7 x 5 mm (calibrated)

$ 21.70

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63.38ct Multicolor Jasper, Oval, Opaque

63.38ct Multicolor Jasper, Oval, Opaque

35.5 x 26.5 mm

$ 31.24

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4.10ct Yellow Citrine, Oval, VVS

4.10ct Yellow Citrine, Oval, VVS

11.9 x 8.7 mm

$ 31.44

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1.90ct Orange Hessonite Garnet, Oval, VS-SI

1.90ct Orange Hessonite Garnet, Oval, VS-SI

8.2 x 6.8 mm

$ 31.22

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16.72ct Multicolor Quartz With Marcasite, Oval, Transparent

16.72ct Multicolor Quartz With Marcasite, Oval, Transparent

20.6 x 14.2 mm

$ 109.91

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1.32ct Orange Hessonite Garnet, Emerald Cut, VS

1.32ct Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 24.58

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1.90ct Orange Moonstone, Cushion, Translucent

1.90ct Orange Moonstone, Cushion, Translucent

7 x 7 mm (calibrated)

$ 3.80

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0.26ct Blue Iolite, Emerald Cut, VS

0.26ct Blue Iolite, Emerald Cut, VS

5 x 3 mm (calibrated)

$ 10.36

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35.20ct Multicolor Labradorite, Oval, Opaque

35.20ct Multicolor Labradorite, Oval, Opaque

33.8 x 18.9 mm

$ 31.56

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0.92ct Blue Kyanite, Oval, SI

0.92ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 22.91

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7.48ct Multicolor Boulder Opal, Oval, Opaque

7.48ct Multicolor Boulder Opal, Oval, Opaque

19.1 x 10.9 mm

$ 37.25

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6.12ct Green Malachite, Baguette, Opaque

6.12ct Green Malachite, Baguette, Opaque

11 x 9 mm (calibrated)

$ 7.71

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3.67ctw Orange Hessonite Garnet, Oval, VS-SI

3.67ctw Orange Hessonite Garnet, Oval, VS-SI

8.2 x 6.7 mm

$ 61.20

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2.78ctw Yellow Citrine, Oval, VVS-VS

2.78ctw Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 15.23

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97.01ct Multicolor Ruby-Zoisite, Oval, Opaque
Ruby-Zoisite Product Video (335063)

97.01ct Multicolor Ruby-Zoisite, Oval, Opaque

27.8 x 22.7 mm

$ 193.24

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4.23ct Yellow Citrine, Oval, VS-SI

4.23ct Yellow Citrine, Oval, VS-SI

11.7 x 8.3 mm

$ 25.63

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5.02ct Multicolor Fire Agate, Fancy, Opaque

5.02ct Multicolor Fire Agate, Fancy, Opaque

11.6 x 8.8 mm

$ 39.21

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1.64ct Violet Amethyst, Marquise, VS

1.64ct Violet Amethyst, Marquise, VS

12.2 x 5.9 mm

$ 12.58

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

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

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 -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate
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