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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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Yellow Untreated Gemstones
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1.38ct Green Tourmaline, Emerald Cut, VS-SI

18.8 x 3.3 mm

$ 33.27

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1.33ct Purple Sapphire, Cushion, VS

6.5 x 5.9 mm

$ 702.35

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1.07ct Red Rhodolite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 28.42

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4.17ct Brown Smoky Quartz, Round, VS

11 mm (calibrated)

$ 6.86

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1.91ct Orange Hessonite Garnet, Oval, SI

8.2 x 6.8 mm

$ 35.57

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0.75ct Green Peridot, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 5.23

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1.64ct Green Prehnite, Oval, Transparent

8.5 x 7.2 mm

$ 8.82

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13.83ct Gray Jadeite, Oval, Translucent

20 x 12.4 mm

$ 45.46

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4.71ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 36.12

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9.78ctw Multicolor Pietersite, Oval, Opaque

16 x 12 mm (calibrated)

$ 22.89

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1.17ct Purple Tourmaline, Oval, Transparent

7.6 x 5.7 mm

$ 19.39

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5.38ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 114.41

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3.33ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 20.91

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0.69ct Green Tourmaline, Emerald Cut, VVS

8.9 x 3.4 mm

$ 34.36

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30.57ct Multicolor Jasper, Oval, Opaque

31.3 x 19.9 mm

$ 18.16

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2.56ct White Moonstone, Oval, Translucent

10 x 7 mm (calibrated)

$ 7.01

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0.34ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 2.71

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11.65ctw Multicolor Pietersite, Round, Opaque

15 mm (calibrated)

$ 28.54

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2.52ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.18

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1.79ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 3.59

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1.46ct Green Sphene, Oval, Transparent

6.3 x 5.9 mm

$ 8.00

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2.76ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 20.51

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1.28ctw Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 12.75

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0.54ctw Blue Kyanite, Round, VS-SI

3.8 mm

$ 9.68

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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

Easy and functional

Posted By Dessa in March, 2026
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Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
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Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
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Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
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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

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
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