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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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Untreated Gemstones Treatment

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0.45ct Green Peridot, Marquise, VVS-VS

0.45ct Green Peridot, Marquise, VVS-VS

7.5 x 3.7 mm

$ 6.72

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6.70ct Pink Strawberry Quartz, Oval, Translucent

6.70ct Pink Strawberry Quartz, Oval, Translucent

12.7 x 10.6 mm

$ 40.38

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2.27ctw Red Pyrope Garnet, Marquise, VS

2.27ctw Red Pyrope Garnet, Marquise, VS

9.8 x 5.1 mm

$ 19.90

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4.55ct Multicolor Fire Agate, Fancy, Opaque

4.55ct Multicolor Fire Agate, Fancy, Opaque

12.2 x 8.5 mm

$ 34.99

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28.24ct Multicolor Jasper, Oval, Opaque

28.24ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 20.73

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4.37ct Orange Sunstone, Oval, Translucent

4.37ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 26.00

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23.31ctw Multicolor Jasper, Oval, Opaque

23.31ctw Multicolor Jasper, Oval, Opaque

26.3 x 12.2 mm

$ 38.30

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2.61ct Green Tourmaline, Emerald Cut, VVS

2.61ct Green Tourmaline, Emerald Cut, VVS

21.6 x 3.6 mm

$ 71.50

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2.85ctw White Rainbow Moonstone, Square, Transparent

2.85ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 44.24

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4.80ct Violet Amethyst, Round, VVS

4.80ct Violet Amethyst, Round, VVS

11 mm (calibrated)

$ 31.56

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3.69ct Violet Amethyst, Briolette, VS

3.69ct Violet Amethyst, Briolette, VS

11.4 x 7.6 mm

$ 16.18

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8.10ct Multicolor Agate, Round, Opaque

8.10ct Multicolor Agate, Round, Opaque

12 mm (calibrated)

$ 13.71

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18.49ct White Agate, Pear Shape, Opaque

18.49ct White Agate, Pear Shape, Opaque

21.8 x 19.2 mm

$ 29.28

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0.85ct Brown Smoky Quartz, Baguette, VVS

0.85ct Brown Smoky Quartz, Baguette, VVS

6.5 x 5.4 mm

$ 5.93

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2.61ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.61ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8.3 x 6.9 mm

$ 51.48

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4.23ct Yellow Cat'S Eye Opal, Oval, Opaque

4.23ct Yellow Cat'S Eye Opal, Oval, Opaque

13.5 x 8 mm

$ 12.64

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3.45ct Yellow Citrine, Oval, VVS

3.45ct Yellow Citrine, Oval, VVS

11.8 x 8.9 mm

$ 20.91

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5.47ct Pink Morganite, Trillion, Transparent

5.47ct Pink Morganite, Trillion, Transparent

12.6 x 12.1 mm

$ 59.93

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3.71ct Violet Amethyst, Round, VS

3.71ct Violet Amethyst, Round, VS

10 mm (calibrated)

$ 28.45

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33.53ct White Jadeite, Fancy, Translucent

33.53ct White Jadeite, Fancy, Translucent

29.8 x 19.2 mm

$ 9.79

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1.85ctw Red Pyrope Garnet, Emerald Cut, VS

1.85ctw Red Pyrope Garnet, Emerald Cut, VS

5.5 x 3.6 mm

$ 14.19

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4.51ctw Multicolor Labradorite, Marquise, Translucent

4.51ctw Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 9.97

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5.96ct Yellow Citrine, Briolette, VVS-VS

5.96ct Yellow Citrine, Briolette, VVS-VS

14.1 x 8.4 mm

$ 33.37

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2.73ct Pink Strawberry Quartz, Oval, Transparent

2.73ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 20.29

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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

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
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
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