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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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6.38ct Multicolor Pietersite, Oval, Opaque

14 x 9 mm (calibrated)

$ 15.44

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8.47ct Brown Star Moonstone, Oval, Translucent

13.3 x 10 mm

$ 37.12

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3.67ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6.1 mm

$ 40.33

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104.71ct Violet Amethyst, Pear Shape, VVS

33.5 x 33.3 mm

$ 784.27

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12.55ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 16.25

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0.80ct Green Peridot, Oval, VVS

7 x 5 mm (calibrated)

$ 11.16

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0.95ctw Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 7.57

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1.33ct Green Sphene, Oval, Transparent

6.5 x 5.6 mm

$ 7.29

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1.41ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 23.17

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24.82ct Multicolor Rainbow Pyrite, Fancy, Opaque

29 x 14.9 mm

$ 74.16

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1.02ct Pink Tourmaline, Oval, Transparent

7.4 x 5.9 mm

$ 16.90

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0.44ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.50

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11.03ct Green Prehnite, Fancy, Translucent

16 x 12 mm (calibrated)

$ 18.12

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1.09ct Pink Tourmaline, Emerald Cut, VS

9 x 4.2 mm

$ 78.82

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2.50ct Yellow Citrine, Baguette, VS

11.8 x 5.9 mm

$ 19.17

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4.77ct Multicolor Rainbow Pyrite, Fancy, Opaque

17 x 12.5 mm

$ 16.77

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1.95ct Yellow Citrine, Oval, Transparent

8 x 6 mm (calibrated)

$ 10.68

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2.32ct Orange Hessonite Garnet, Cushion, SI

8 x 8 mm (calibrated)

$ 50.84

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32.15ct Multicolor Feather Pyrite, Cushion, Opaque

23.8 x 21.2 mm

$ 25.08

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1.36ct Green Tourmaline, Emerald Cut, VS

12.5 x 3.7 mm

$ 67.73

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0.66ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 10.96

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3.12ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 23.40

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23.92ct White Rainbow Moonstone, Pear Shape, Translucent

30.6 x 14.5 mm

$ 166.77

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3.26ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 22.73

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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

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 -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate
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