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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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7.78ct Green Prehnite, Fancy, Transparent

18.1 x 11.1 mm

$ 10.82

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13.85ct White Rainbow Moonstone, Marquise, Transparent

26.7 x 11.4 mm

$ 206.92

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3.76ct White Moonstone, Oval, Translucent

11 x 9 mm (calibrated)

$ 41.19

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0.14ctw White Diamond, Round, VVS-VS

2.7 mm (calibrated)

$ 250.28

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4.57ct Multicolor Pietersite, Round, Opaque

11 mm (calibrated)

$ 10.79

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14.17ct Pink Rose Quartz, Marquise, Transparent

25.4 x 12.2 mm

$ 23.30

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1.15ct Green Sphene, Oval, Transparent

6.2 x 5.6 mm

$ 5.73

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2.91ctw Multicolor Labradorite, Marquise, Translucent

10 x 5.2 mm

$ 6.43

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1.83ct Yellow Beryl, Trillion, VVS

9 x 8.6 mm

$ 43.74

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12.01ctw White Topaz, Cushion, VS

12 x 10 mm (calibrated)

$ 79.75

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0.68ct Orange Sphalerite, Round, VS-SI

5 mm (calibrated)

$ 33.86

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1.52ct Pink Strawberry Quartz, Round, Transparent

8 mm (calibrated)

$ 13.33

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3.48ct Yellow Rutile Topaz, Pear Shape, Transparent

13.8 x 7.5 mm

$ 72.21

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6.15ct Brown Mother Of Pearl, Fancy, Opaque

19.6 x 13.2 mm

$ 13.40

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4.56ct Pink Morganite, Oval, Transparent

13 x 9 mm (calibrated)

$ 49.96

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15.36ctw Multicolor Jasper, Pear Shape, Opaque

20.4 x 13.2 mm

$ 9.02

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1.60ct Orange Hessonite Garnet, Oval, VS

7.9 x 6.3 mm

$ 26.29

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1.16ct Pink Tourmaline, Emerald Cut, VVS-VS

8.7 x 4.2 mm

$ 87.69

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0.32ct Pink Morganite, Round, VS

4.7 mm

$ 13.28

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1.60ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.75

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0.76ct Yellow Color-Change Diaspore, Pear Shape, VVS

8.1 x 4.5 mm

$ 40.12

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1.37ctw Yellow Zircon, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 34.11

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2.17ct Yellow Beryl, Trillion, VS

9 x 9 mm (calibrated)

$ 47.55

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22.20ct Black Nuummite, Oval, Opaque

20.9 x 16.1 mm

$ 97.51

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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

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 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

Very good.

Posted By Tommy in December, 2025
Source: Bizrate
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