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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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8.18ctw Violet Amethyst, Oval, Transparent

12 x 10 mm (calibrated)

$ 44.81

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1.07ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 23.45

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2.48ct Pink Morganite, Pear Shape, VVS-VS

13.1 x 7.1 mm

$ 102.92

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1.33ct Red Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 22.80

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1.82ct Green Sphene, Oval, Transparent

9 x 6 mm (calibrated)

$ 9.06

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23.48ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

30.2 x 16.5 mm

$ 10.76

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28.52ct White Rainbow Moonstone, Baguette, Transparent

32.1 x 11.4 mm

$ 227.25

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1.66ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 12.73

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42.51ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 46.57

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27.10ct Orange Moonstone, Oval, Opaque

22.2 x 16.1 mm

$ 40.49

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4.52ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 24.76

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24.74ctw Multicolor Coral, Oval, Opaque

20.8 x 13.3 mm

$ 46.90

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0.90ct Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 38.53

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3.89ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 34.10

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21.51ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

27.4 x 17.2 mm

$ 21.42

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23.18ct Multicolor Bloodstone, Oval, Opaque

17.1 x 14.2 mm

$ 46.17

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62.52ct Red Star Garnet, Round, Opaque

21.5 mm

$ 61.64

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4.18ct Yellow Moonstone, Oval, Translucent

11 x 9 mm (calibrated)

$ 9.20

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0.63ct Yellow Grossularite Garnet, Round, VVS-VS

5 mm (calibrated)

$ 15.88

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1.89ct Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 11.56

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5.25ct Yellow Citrine, Oval, VVS-VS

13.4 x 10.5 mm

$ 40.27

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30.77ct White Rainbow Moonstone, Pear Shape, Translucent

27 x 20 mm (calibrated)

$ 214.53

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4.61ctw Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 172.18

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23.47ctw Multicolor Fossil Coral, Oval, Opaque

20.4 x 11.9 mm

$ 30.34

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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 to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy 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 -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate
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