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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
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Yellow Untreated Gemstones
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33.61ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

32.9 x 20.9 mm

$ 15.40

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1.47ct Green Tourmaline, Emerald Cut, SI

19 x 3.2 mm

$ 35.42

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85.13ct Multicolor Agate, Square, Opaque

28 x 27.6 mm

$ 29.68

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1.07ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 8.52

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25.43ct Gray Hematite, Marquise, Opaque

24.5 x 12.8 mm

$ 25.64

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23.30ct Multicolor Jasper, Fancy, Opaque

24.7 x 21.3 mm

$ 13.45

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1.70ctw Green Demantoid Garnet, Round, VS-SI

3.1 mm

$ 74.50

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2.90ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 57.19

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0.18ct Brown Diamond, Round, VVS-VS

3.5 mm (calibrated)

$ 298.73

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28.12ct Multicolor Jasper, Fancy, Opaque

32.1 x 20.6 mm

$ 17.65

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11.36ct Multicolor Boulder Opal, Pear Shape, Opaque

26.3 x 13.8 mm

$ 56.57

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3.20ct Green Malachite, Oval, Opaque

9 x 7 mm (calibrated)

$ 6.37

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41.44ct Multicolor Jasper, Oval, Opaque

29.3 x 27.5 mm

$ 25.43

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5.71ct Multicolor Pietersite, Trillion, Opaque

13 x 13 mm (calibrated)

$ 18.96

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22.21ct Green Aventurine, Oval, Translucent

24.6 x 19.1 mm

$ 22.12

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2.87ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 3.94

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1.43ct Pink Tourmaline, Emerald Cut, VVS-VS

7.6 x 5.7 mm

$ 103.40

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6.86ctw Multicolor Labradorite, Marquise, Translucent

14 x 7 mm (calibrated)

$ 15.17

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3.89ct Black Cat'S Eye Scapolite, Round, Translucent

10 mm (calibrated)

$ 21.31

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10.04ct Multicolor Rainbow Pyrite, Fancy, Opaque

15.2 x 18 mm

$ 26.00

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5.37ct Multicolor Agate, Round, Opaque

11 mm (calibrated)

$ 5.08

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4.50ct Pink Morganite, Oval, Transparent

13 x 9 mm (calibrated)

$ 49.30

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2.99ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 22.92

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3.09ct Yellow Citrine, Emerald Cut, Transparent

12 x 10 mm (calibrated)

$ 23.70

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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

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
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Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
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Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
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Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
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Overall Rating -> 10 star ratings

It was easy to navigate

Posted By GemGod in July, 2025
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