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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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1.37ct Purple Rhodolite Garnet, Oval, VS

1.37ct Purple Rhodolite Garnet, Oval, VS

6.9 x 5.9 mm

$ 41.67

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2.76ct Yellow Sphene, Oval, Transparent

2.76ct Yellow Sphene, Oval, Transparent

9 x 7 mm (calibrated)

$ 15.12

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3.89ctw Red Pyrope Garnet, Marquise, VVS-VS

3.89ctw Red Pyrope Garnet, Marquise, VVS-VS

12.2 x 6.1 mm

$ 34.10

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26.15ct Violet Amethyst, Round, VVS

26.15ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 182.32

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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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8.38ct Multicolor Pietersite, Oval, Opaque

8.38ct Multicolor Pietersite, Oval, Opaque

22.6 x 13.9 mm

$ 27.82

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1.48ctw Red Pyrope Garnet, Square, VVS-VS

1.48ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 11.35

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20.62ct Multicolor Agate, Oval, Opaque

20.62ct Multicolor Agate, Oval, Opaque

16.2 x 15.1 mm

$ 19.51

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7.38ct Violet Amethyst, Pear Shape, Transparent

7.38ct Violet Amethyst, Pear Shape, Transparent

16.5 x 11.3 mm

$ 44.11

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1.86ct Orange Hessonite Garnet, Oval, VS

1.86ct Orange Hessonite Garnet, Oval, VS

8.2 x 6.8 mm

$ 32.46

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0.83ct Green Tourmaline, Baguette, VVS-VS

0.83ct Green Tourmaline, Baguette, VVS-VS

10.8 x 3.1 mm

$ 28.93

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1.13ct Brown Color-Change Garnet, Oval, VVS-VS

1.13ct Brown Color-Change Garnet, Oval, VVS-VS

6.9 x 5.2 mm

$ 90.28

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8.60ct Multicolor Pietersite, Pear Shape, Opaque

8.60ct Multicolor Pietersite, Pear Shape, Opaque

22.9 x 11.6 mm

$ 25.70

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0.95ct Yellow Morganite, Cushion, VS

0.95ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 57.25

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0.93ct Yellow Citrine, Trillion, VVS-VS

0.93ct Yellow Citrine, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 7.13

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1.16ctw Yellow Citrine, Pear Shape, VVS-VS

1.16ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 7.63

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8.13ct Pink Kunzite, Emerald Cut, VS
Kunzite Product Video (695360)

8.13ct Pink Kunzite, Emerald Cut, VS

11 x 11 mm (calibrated)

$ 202.44

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15.11ct Black Nuummite, Oval, Opaque

15.11ct Black Nuummite, Oval, Opaque

18 x 13 mm (calibrated)

$ 66.67

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14.37ct Multicolor Agate, Oval, Opaque

14.37ct Multicolor Agate, Oval, Opaque

14.8 x 12.8 mm

$ 24.34

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7.86ct Blue Chalcedony, Cushion, Translucent

7.86ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 29.37

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0.91ct Yellow Sphene, Oval, Transparent

0.91ct Yellow Sphene, Oval, Transparent

6.4 x 5.3 mm

$ 4.53

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0.45ct Orange Spessartite Garnet, Oval, VS

0.45ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 13.45

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2.03ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.03ctw White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.67

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22.80ct Multicolor Labradorite, Oval, Opaque

22.80ct Multicolor Labradorite, Oval, Opaque

30.6 x 16.8 mm

$ 20.43

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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

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
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 -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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