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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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12.08ctw White Topaz, Cushion, VVS-VS

12 x 10 mm (calibrated)

$ 80.21

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2.38ctw Violet Amethyst, Oval, VS

7 x 5 mm (calibrated)

$ 13.04

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5.26ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 34.58

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5.40ctw Purple Rhodolite Garnet, Trillion, VS

5.2 x 5.2 mm

$ 47.33

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3.67ct Multicolor Opal, Oval, Transparent

14 x 10 mm (calibrated)

$ 92.26

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7.83ctw White Dendritic Agate, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 6.23

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24.46ct White Rainbow Moonstone, Oval, Translucent

26.8 x 16 mm

$ 24.36

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0.98ct Orange Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 59.05

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3.97ct Yellow Citrine, Oval, VVS

11.5 x 9.5 mm

$ 26.10

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0.78ct Purple Spinel, Oval, VVS-VS

5.8 x 5 mm

$ 72.59

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0.99ct Orange Hessonite Garnet, Square, VS

5.8 x 5.5 mm

$ 16.65

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5.06ct Brown Tiger'S Eye, Oval, Opaque

13.2 x 9.6 mm

$ 4.20

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27.68ct Multicolor Obsidian, Oval, Opaque

27 x 20 mm (calibrated)

$ 30.33

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12.29ct Turquoise Larimar, Oval, Opaque

18 x 13 mm (calibrated)

$ 146.76

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0.85ct Green Sphene, Oval, Transparent

5.6 x 5 mm

$ 4.23

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1.57ctw Red Pyrope Garnet, Square, VVS-VS

4.9 x 4.8 mm

$ 12.04

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4.27ct Black Star Diopside, Round, Opaque

9 mm (calibrated)

$ 21.26

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2.09ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.17

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20.44ctw Multicolor Labradorite, Oval, Translucent

20 x 13.1 mm

$ 44.79

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23.22ct Multicolor Amethyst Geode Slice, Fancy, Transparent

25.1 x 19.9 mm

$ 24.75

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1.33ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 10.20

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21.42ct Multicolor Jasper, Cushion, Opaque

25 x 18 mm (calibrated)

$ 23.46

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0.91ct Orange Hessonite Garnet, Oval, VS-SI

6.9 x 5.2 mm

$ 18.13

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15.82ct Multicolor Agate, Oval, Opaque

15.7 x 13.9 mm

$ 26.78

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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. I ts very user friendly.

Posted By Shalini in June, 2025
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Overall Rating -> 9 star ratings

It was great!

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

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
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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

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
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Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
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