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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
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.89ct Brown Smoky Quartz, Marquise, VVS

13 x 8.2 mm

$ 11.02

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35.24ctw Multicolor Jasper, Oval, Opaque

33.3 x 14.8 mm

$ 57.92

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2.05ct Orange Zircon, Pear Shape, VVS

9.1 x 6.4 mm

$ 37.62

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0.64ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 17.53

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4.95ct Multicolor Ruby In Fuchsite, Marquise, Translucent

20.3 x 9.8 mm

$ 36.55

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42.03ct Orange Strawberry Quartz, Fancy, Opaque

37.5 x 12.2 mm

$ 3.49

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0.96ct Yellow Citrine, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 6.32

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25.43ct Black Snowflake Obsidian, Cushion, Opaque

24.5 x 19 mm

$ 16.72

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51.53ct Multicolor Jasper, Oval, Opaque

35.1 x 23.3 mm

$ 44.03

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19.76ct Green Serpentine, Oval, Translucent

24.8 x 16.2 mm

$ 42.31

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0.98ct White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 3.05

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1.38ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 26.34

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3.35ct Violet Amethyst, Pear Shape, VVS

12.6 x 9.6 mm

$ 23.36

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0.93ct White Sillimanite Cat'S Eye, Oval, Transparent

7.4 x 4.7 mm

$ 3.58

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1.49ct Pink Tourmaline, Round, VS

6.5 mm (calibrated)

$ 207.77

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46.66ct Green Serpentine, Oval, Translucent

41.4 x 24.8 mm

$ 99.92

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0.79ct Orange Fire Opal, Oval, Transparent

8.4 x 6.2 mm

$ 27.54

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3.81ct White Topaz, Cushion, VVS-VS

10 x 8.6 mm

$ 26.56

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1.09ct Yellow Citrine, Round, VS

6.5 mm (calibrated)

$ 7.24

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1.39ct Orange Hessonite Garnet, Oval, VS-SI

7.4 x 6 mm

$ 27.69

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3.10ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 23.22

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2.88ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.74

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0.71ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

8.9 x 4.2 mm

$ 24.89

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5.69ct Pink Morganite, Round, Transparent

12 mm (calibrated)

$ 62.34

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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

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate
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