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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
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0.58ct Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 4.62

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4.63ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 55.34

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20.16ct Multicolor Pietersite, Cushion, Opaque

20.6 x 17.9 mm

$ 66.93

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4.45ct Yellow Apatite, Oval, VVS-VS

11.6 x 9 mm

$ 146.26

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2.42ctw Red Pyrope Garnet, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 18.56

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1.61ct Green Tourmaline, Oval, VS

7.1 x 6.4 mm

$ 187.08

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0.40ct Pink Morganite, Round, VS

5 mm (calibrated)

$ 17.93

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4.68ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 28.10

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2.31ct Blue Kyanite, Oval, SI

10.7 x 7 mm

$ 50.61

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1.56ctw Violet Amethyst, Marquise, VVS-VS

10 x 5 mm (calibrated)

$ 10.36

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1.92ct Green Tourmaline, Emerald Cut, VVS-VS

24.1 x 3 mm

$ 37.25

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23.17ct Blue Turquoise, Oval, Opaque

21.4 x 16.3 mm

$ 69.23

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45.47ct Violet Charoite, Cushion, Opaque

28.4 x 22.6 mm

$ 74.72

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0.64ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 9.56

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2.82ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 46.35

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25.55ctw Multicolor Moss Agate, Oval, Transparent

28.7 x 14.1 mm

$ 25.45

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1.63ct Green Tourmaline, Emerald Cut, VVS-VS

17.8 x 3.4 mm

$ 34.79

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3.71ct Brown Smoky Quartz, Emerald Cut, VS

9.5 x 9.4 mm

$ 20.33

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110.36ct Multicolor Agate, Oval, Opaque

34.8 x 31.3 mm

$ 65.95

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88.57ct Multicolor Jasper, Round, Opaque

37.8 mm

$ 55.31

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1.53ct Green Tourmaline, Round, Transparent

7 mm (calibrated)

$ 21.66

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1.14ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.5 mm

$ 124.90

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16.50ctw Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 36.49

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8.42ct Multicolor Boulder Opal, Oval, Opaque

18.8 x 13.8 mm

$ 58.71

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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 -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. 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
Enlarged Gemstone Image