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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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Yellow Untreated Gemstones
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6.49ct Multicolor Labradorite, Pear Shape, Translucent

14 x 10 mm (calibrated)

$ 14.35

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0.40ct Green Kornerupine, Baguette, VS

5.9 x 3.3 mm

$ 21.91

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1.46ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.20

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1.14ct Orange Hessonite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 20.43

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2.36ctw White Rainbow Moonstone, Oval, Transparent

7.1 x 6.1 mm

$ 77.59

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2.08ct Orange Hessonite Garnet, Oval, VS-SI

8.8 x 7.4 mm

$ 61.74

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2.95ct Green Prehnite, Oval, Transparent

10.5 x 7.9 mm

$ 8.73

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2.47ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 12.30

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17.69ct Violet Amethyst, Pear Shape, VVS-VS

21.2 x 16.1 mm

$ 123.34

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8.96ct Multicolor Pietersite, Oval, Opaque

18 x 13 mm (calibrated)

$ 34.75

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12.43ct Green Prehnite, Fancy, Translucent

18.5 x 12.1 mm

$ 20.42

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4.90ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 26.84

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2.13ct Purple Rhodolite Garnet, Oval, VVS-VS

8.3 x 6.8 mm

$ 84.86

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23.63ct Pink Rose Quartz, Oval, Transparent/Translucent

19.2 x 15.8 mm

$ 33.66

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12.81ct Green Bloodstone, Oval, Opaque

14.2 x 11.5 mm

$ 25.51

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46.73ct White Rainbow Moonstone, Oval, Translucent

33.9 x 21 mm

$ 46.55

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3.48ct Brown Tiger'S Eye, Pear Shape, Opaque

10 x 10 mm (calibrated)

$ 4.50

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21.27ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

29.5 x 15.5 mm

$ 9.53

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4.05ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 31.07

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0.43ct Orange Citrine, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 3.00

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0.79ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 6.29

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1.88ct Red Almandine Garnet, Marquise, VVS

12 x 6 mm

$ 70.22

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13.27ctw Bi-Color Tourmaline, Fancy, Transparent

20.1 x 17.3 mm

$ 330.42

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5.60ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 33.62

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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

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 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

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
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Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
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Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate
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