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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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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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25.23ct Violet Charoite, Pear Shape, Opaque

32.8 x 15.8 mm

$ 47.26

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10.74ct Brown Tiger'S Eye, Baguette, Opaque

16 x 12 mm (calibrated)

$ 13.90

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5.95ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 24.69

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19.46ct Gray Hematite, Marquise, Opaque

23.9 x 11.4 mm

$ 18.97

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0.78ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.44

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6.19ct Yellow Citrine, Oval, VVS

14.1 x 10.6 mm

$ 33.97

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2.78ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 15.23

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1.33ct Green Tourmaline, Emerald Cut, VVS-VS

20.9 x 3 mm

$ 43.72

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0.92ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 18.33

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8.84ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 8.81

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3.40ct Yellow Rutile Topaz, Pear Shape, Transparent

12.4 x 7.5 mm

$ 70.55

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0.83ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.79

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1.83ct White Opal, Oval, Transparent

10.7 x 7.9 mm

$ 45.57

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1.16ct Yellow Sphene, Oval, Transparent

6.9 x 6.1 mm

$ 6.36

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14.54ct Black Nuummite, Cushion, Opaque

16.3 x 14.3 mm

$ 52.41

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8.08ct Multicolor Ruby-Zoisite, Square, Opaque

11 x 10 mm

$ 22.13

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1.99ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 87.21

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0.56ct Yellow Color-Change Diaspore, Cushion, VVS

5.4 x 4.5 mm

$ 29.56

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1.47ct Pink Morganite, Round, VVS-VS

7.5 mm (calibrated)

$ 102.49

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1.57ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 12.51

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26.30ct White Howlite, Oval, Opaque

29.3 x 19.9 mm

$ 13.10

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0.55ct Green Peridot, Emerald Cut, VVS

6 x 4 mm (calibrated)

$ 8.22

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1.79ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 13.73

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8.00ct Pink Morganite, Pear Shape, Translucent

15 x 10.8 mm

$ 33.20

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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

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
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate
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