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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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Yellow Untreated Gemstones
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22.94ct Pink Rose Quartz, Oval, Transparent/Translucent

22.94ct Pink Rose Quartz, Oval, Transparent/Translucent

19.7 x 17.2 mm

$ 32.67

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2.17ct Orange Hessonite Garnet, Cushion, VS

2.17ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 36.96

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0.55ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.55ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.7 x 3.7 mm

$ 20.83

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1.86ct Multicolor Pietersite, Round, Opaque

1.86ct Multicolor Pietersite, Round, Opaque

8 mm (calibrated)

$ 4.39

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1.26ct Orange Zircon, Round, VVS-VS

1.26ct Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 30.06

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0.78ct Orange Sphalerite, Oval, VS-SI

0.78ct Orange Sphalerite, Oval, VS-SI

5.7 x 4.9 mm

$ 38.84

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17.82ct Blue Chalcedony, Pear Shape, Opaque

17.82ct Blue Chalcedony, Pear Shape, Opaque

26.1 x 18.4 mm

$ 44.37

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2.23ct Pink Strawberry Quartz, Oval, Transparent

2.23ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 11.11

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0.29ct Violet Iolite, Emerald Cut, VVS-VS

0.29ct Violet Iolite, Emerald Cut, VVS-VS

5 x 3 mm (calibrated)

$ 11.55

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21.12ct Multicolor Rainbow Pyrite, Fancy, Opaque

21.12ct Multicolor Rainbow Pyrite, Fancy, Opaque

19.6 x 11.3 mm

$ 54.69

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0.85ct Green Peridot, Emerald Cut, VVS

0.85ct Green Peridot, Emerald Cut, VVS

7 x 5 mm (calibrated)

$ 12.70

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9.97ct Green Maw-Sit-Sit, Oval, Opaque

9.97ct Green Maw-Sit-Sit, Oval, Opaque

16 x 12 mm (calibrated)

$ 23.26

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0.80ctw Yellow Citrine, Oval, VS

0.80ctw Yellow Citrine, Oval, VS

6 x 4 mm (calibrated)

$ 4.38

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3.56ctw Brown Smoky Quartz, Round, VS

3.56ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 27.30

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4.16ct Yellow Cat'S Eye Opal, Oval, Translucent

4.16ct Yellow Cat'S Eye Opal, Oval, Translucent

11.8 x 8.8 mm

$ 13.68

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0.55ct Green Peridot, Marquise, VVS-VS

0.55ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 8.22

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1.53ct Multicolor Opal, Oval, Transparent

1.53ct Multicolor Opal, Oval, Transparent

10.1 x 7.6 mm

$ 70.41

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4.99ct Yellow Citrine, Pear Shape, VVS

4.99ct Yellow Citrine, Pear Shape, VVS

12.7 x 12.1 mm

$ 32.80

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30.82ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

30.82ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

30.7 x 16.8 mm

$ 30.69

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4.01ctw Purple Rhodolite Garnet, Oval, VS

4.01ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 85.27

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3.26ctw White Rainbow Moonstone, Square, Transparent

3.26ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 51.49

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9.63ct Pink Rose Quartz, Emerald Cut, Transparent

9.63ct Pink Rose Quartz, Emerald Cut, Transparent

13 x 13 mm (calibrated)

$ 52.75

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1.14ct Brown Kornerupine, Oval, VVS-VS

1.14ct Brown Kornerupine, Oval, VVS-VS

8 x 5.7 mm

$ 62.45

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13.92ct Red Pyrope Garnet, Pear Shape, VS
Pyrope Garnet Product Video (741081)

13.92ct Red Pyrope Garnet, Pear Shape, VS

18 x 13 mm (calibrated)

$ 404.38

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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

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 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

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate
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