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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
Untreated Gemstones Price
Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.98ctw Red Pyrope Garnet, Pear Shape, VVS-VS

1.98ctw Red Pyrope Garnet, Pear Shape, VVS-VS

8 x 5.3 mm

$ 8.67

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29.14ctw Multicolor Fossil Coral, Oval, Opaque

29.14ctw Multicolor Fossil Coral, Oval, Opaque

21.3 x 13 mm

$ 63.21

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1.49ct Green Tourmaline, Emerald Cut, VVS-VS

1.49ct Green Tourmaline, Emerald Cut, VVS-VS

12.7 x 3.9 mm

$ 48.97

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1.19ct Green Tourmaline, Oval, VS

1.19ct Green Tourmaline, Oval, VS

7.1 x 5.7 mm

$ 56.89

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12.11ct Brown Smoky Quartz, Round, Transparent

12.11ct Brown Smoky Quartz, Round, Transparent

16 mm (calibrated)

$ 39.80

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0.77ct Green Peridot, Oval, VVS-VS

0.77ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 10.74

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5.32ct Black Star Diopside, Oval, Opaque

5.32ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 22.08

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0.25ct Yellow Sphalerite, Round, SI-I1

0.25ct Yellow Sphalerite, Round, SI-I1

3.5 mm (calibrated)

$ 12.45

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5.38ct Multicolor Labradorite, Marquise, Translucent

5.38ct Multicolor Labradorite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 11.89

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2.46ct Orange Hessonite Garnet, Oval, VS

2.46ct Orange Hessonite Garnet, Oval, VS

9 x 7.4 mm

$ 53.90

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0.37ct Blue Kyanite, Round, VS-SI

0.37ct Blue Kyanite, Round, VS-SI

4.2 mm

$ 9.21

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1.72ct Yellow Beryl, Round, VVS

1.72ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 34.26

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12.38ct Multicolor Boulder Opal, Fancy, Translucent

12.38ct Multicolor Boulder Opal, Fancy, Translucent

25 x 18 mm (calibrated)

$ 61.65

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0.71ct Green Peridot, Oval, VS

0.71ct Green Peridot, Oval, VS

6.6 x 5 mm

$ 10.89

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1.27ct Orange Zircon, Emerald Cut, VVS-VS

1.27ct Orange Zircon, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 20.87

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3.30ctw Brown Smoky Quartz, Round, VS

3.30ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 6.57

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1.34ct Yellow Citrine, Round, VVS-VS

1.34ct Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 10.67

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0.74ct Brown Tiger'S Eye, Pear Shape, Opaque

0.74ct Brown Tiger'S Eye, Pear Shape, Opaque

6.1 x 5.6 mm

$ 0.95

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1.25ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

1.25ct Orange Hessonite Garnet, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 24.90

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29.76ct Black Nuummite, Oval, Opaque

29.76ct Black Nuummite, Oval, Opaque

23.1 x 16.6 mm

$ 130.72

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4.85ct Green Jade, Oval, Opaque

4.85ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 9.66

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4.62ct Multicolor Fire Agate, Fancy, Opaque

4.62ct Multicolor Fire Agate, Fancy, Opaque

13 x 9 mm (calibrated)

$ 35.52

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0.78ct Green Peridot, Oval, VVS-VS

0.78ct Green Peridot, Oval, VVS-VS

6.6 x 5 mm

$ 5.44

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1.03ct Pink Morganite, Oval, VVS-VS

1.03ct Pink Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 56.42

View Gem
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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

Was a good experience.

Posted By Tim in July, 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 -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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