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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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2.16ctw Brown Color-Change Garnet, Oval, VS

6.6 x 5.4 mm

$ 172.56

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5.62ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 30.78

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0.92ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.42

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7.69ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 30.42

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2.41ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5.2 mm

$ 21.12

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1.64ctw Orange Hessonite Garnet, Square, VS

3.6 x 3.6 mm

$ 34.90

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1.65ct Orange Hessonite Garnet, Oval, VS

8 x 6.5 mm

$ 32.87

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9.55ct Pink Strawberry Quartz, Oval, Translucent

15.8 x 12.7 mm

$ 73.25

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4.41ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 38.65

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21.21ctw Multicolor Jasper, Fancy, Opaque

25.3 x 15.6 mm

$ 12.46

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2.26ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 84.41

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4.81ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 35.74

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3.06ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 24.39

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32.97ctw Multicolor Moss Agate, Fancy, Transparent

30.4 x 15.1 mm

$ 32.83

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6.34ct Yellow Rutile Quartz, Pear Shape, Translucent

15.1 x 10.8 mm

$ 17.22

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24.94ct Green Aventurine, Fancy, Opaque

34.2 x 9.8 mm

$ 2.07

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18.22ct Green Bloodstone, Oval, Opaque

18 x 13.9 mm

$ 39.92

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0.80ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.9 x 4.5 mm

$ 29.71

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2.09ct Orange Hessonite Garnet, Oval, VS-SI

8.4 x 7.1 mm

$ 41.22

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39.96ctw Multicolor Rhodochrosite, Fancy, Translucent

23.4 x 14.3 mm

$ 52.54

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0.30ct Violet Amethyst, Emerald Cut, VS

5.1 x 3.2 mm

$ 1.74

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10.02ct Green Maw-Sit-Sit, Round, Opaque

12 mm (calibrated)

$ 23.37

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24.41ctw Multicolor Fossil Coral, Fancy, Opaque

24 x 11.9 mm

$ 26.74

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1.34ct Orange Fire Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 46.71

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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

My whole experience is great.

Posted By Ghs in November, 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

Very food

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

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
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Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

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

All good

Posted By DouscheGift in August, 2025
Source: Bizrate
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