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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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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.99ct Blue Kyanite, Oval, VS-SI

0.99ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 21.70

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2.08ctw Orange Sunstone, Oval, Translucent

2.08ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 14.50

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40.19ct Green Maw-Sit-Sit, Square, Opaque
Maw-Sit-Sit Product Video (476852)

40.19ct Green Maw-Sit-Sit, Square, Opaque

17 x 17 mm (calibrated)

$ 132.10

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23.83ctw Multicolor Fossil Coral, Cushion, Opaque

23.83ctw Multicolor Fossil Coral, Cushion, Opaque

17.7 x 12.3 mm

$ 29.77

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1.02ct Yellow Citrine, Marquise, VS

1.02ct Yellow Citrine, Marquise, VS

9.2 x 5 mm

$ 5.59

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0.54ct Orange Fire Opal, Oval, Translucent

0.54ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 12.33

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44.87ct Green Amazonite, Oval, Opaque

44.87ct Green Amazonite, Oval, Opaque

30.4 x 27.5 mm

$ 35.76

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2.51ct Blue Chalcedony, Oval, Transparent

2.51ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.00

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4.81ctw Yellow Citrine, Oval, VVS-VS

4.81ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 26.35

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0.19ctw Violet Iolite, Square, VS

0.19ctw Violet Iolite, Square, VS

2.6 x 2.5 mm

$ 7.57

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6.65ctw Multicolor Labradorite, Marquise, Translucent

6.65ctw Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 14.70

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4.30ctw Red Pyrope Garnet, Marquise, VVS-VS

4.30ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6.1 mm

$ 47.25

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24.46ct Multicolor Jasper, Oval, Opaque

24.46ct Multicolor Jasper, Oval, Opaque

25.6 x 15.9 mm

$ 13.89

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6.23ct Brown Tiger'S Eye, Baguette, Opaque

6.23ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 3.42

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9.83ct White Rainbow Moonstone, Fancy, Transparent

9.83ct White Rainbow Moonstone, Fancy, Transparent

20.8 x 9 mm

$ 176.23

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1.16ct Green Sphene, Oval, Transparent

1.16ct Green Sphene, Oval, Transparent

6.1 x 5.8 mm

$ 5.78

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44.38ct Multicolor Jasper, Oval, Opaque

44.38ct Multicolor Jasper, Oval, Opaque

34.8 x 27.5 mm

$ 18.57

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1.44ct Pink Tourmaline, Oval, VS-SI
Tourmaline Product Video (747441)

1.44ct Pink Tourmaline, Oval, VS-SI

7.4 x 5.9 mm

$ 215.14

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1.96ct Orange Moonstone, Cushion, Translucent

1.96ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 3.90

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2.50ct Blue Chalcedony, Oval, Transparent

2.50ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 4.98

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0.69ct Red Pyrope Garnet, Pear Shape, VVS-VS

0.69ct Red Pyrope Garnet, Pear Shape, VVS-VS

7.3 x 4.8 mm

$ 5.49

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14.32ct Black Obsidian, Pear Shape, Opaque

14.32ct Black Obsidian, Pear Shape, Opaque

24.1 x 16 mm

$ 10.70

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18.25ct White Rainbow Moonstone, Pear Shape, Translucent

18.25ct White Rainbow Moonstone, Pear Shape, Translucent

22.4 x 14.8 mm

$ 127.24

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2.87ct Violet Amethyst, Trillion, VVS-VS

2.87ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.01

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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 -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
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 -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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