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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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0.56ct Pink Morganite, Pear Shape, VVS-VS

0.56ct Pink Morganite, Pear Shape, VVS-VS

8 x 4.1 mm

$ 33.75

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1.78ctw Orange Sunstone, Oval, Translucent

1.78ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 12.41

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1.15ct Purple Rhodolite Garnet, Oval, VVS

1.15ct Purple Rhodolite Garnet, Oval, VVS

7 x 5.4 mm

$ 40.09

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16.23ct White Dendritic Agate, Pear Shape, Translucent

16.23ct White Dendritic Agate, Pear Shape, Translucent

28.1 x 16.5 mm

$ 32.33

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2.24ct Yellow Sphene, Oval, Translucent

2.24ct Yellow Sphene, Oval, Translucent

7.9 x 6.8 mm

$ 11.16

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3.09ct Green Sphene, Pear Shape, SI
Sphene Product Video (413839)

3.09ct Green Sphene, Pear Shape, SI

10.5 x 8.1 mm

$ 338.54

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4.42ct Multicolor Labradorite, Round, Translucent

4.42ct Multicolor Labradorite, Round, Translucent

10 mm (calibrated)

$ 10.74

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1.45ct Pink Tourmaline, Oval, VVS-VS

1.45ct Pink Tourmaline, Oval, VVS-VS

7.5 x 6.8 mm

$ 222.41

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2.78ct Yellow Sphene, Oval, Transparent

2.78ct Yellow Sphene, Oval, Transparent

8.3 x 7 mm

$ 13.84

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7.14ct Yellow Citrine, Cushion, VVS
Citrine Product Video (450739)

7.14ct Yellow Citrine, Cushion, VVS

5.9 x 9.6 mm

$ 49.78

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1.53ct Green Sphene, Oval, Transparent

1.53ct Green Sphene, Oval, Transparent

7 x 5.9 mm

$ 7.62

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5.90ct Green Prehnite, Fancy, Translucent

5.90ct Green Prehnite, Fancy, Translucent

13.4 x 10 mm

$ 9.70

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5.41ct Yellow Citrine, Briolette, VVS-VS

5.41ct Yellow Citrine, Briolette, VVS-VS

12.2 x 8.8 mm

$ 30.30

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7.00ctw Yellow Citrine, Pear Shape, VVS-VS

7.00ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 54.68

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0.52ct Blue Kyanite, Round, SI

0.52ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 12.95

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9.71ctw Multicolor Pietersite, Oval, Opaque

9.71ctw Multicolor Pietersite, Oval, Opaque

20.2 x 10.9 mm

$ 22.73

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1.17ct White Sillimanite Cat'S Eye, Oval, Transparent

1.17ct White Sillimanite Cat'S Eye, Oval, Transparent

6.5 x 6.4 mm

$ 4.66

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7.24ctw Yellow Citrine, Emerald Cut, VVS-VS

7.24ctw Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 55.53

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3.53ct Turquoise Grandidierite, Oval, SI

3.53ct Turquoise Grandidierite, Oval, SI

10.9 x 9.4 mm

$ 154.70

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3.35ctw Red Pyrope Garnet, Oval, VVS-VS

3.35ctw Red Pyrope Garnet, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 29.37

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6.48ctw Green Prehnite, Oval, Transparent

6.48ctw Green Prehnite, Oval, Transparent

8 x 6 mm (calibrated)

$ 35.50

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0.39ct Orange Spessartite Garnet, Oval, SI

0.39ct Orange Spessartite Garnet, Oval, SI

5.3 x 3.9 mm

$ 13.21

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1.83ct Violet Amethyst, Pear Shape, VVS-VS

1.83ct Violet Amethyst, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 14.04

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3.88ctw Red Pyrope Garnet, Square, VS

3.88ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 29.76

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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

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
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

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

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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