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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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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Yellow Untreated Gemstones
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4.87ct Orange Sunstone, Oval, Translucent

4.87ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 28.97

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2.52ct Green Peridot, Cushion, VS

2.52ct Green Peridot, Cushion, VS

9 x 7 mm (calibrated)

$ 98.84

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2.54ctw Yellow Citrine, Round, VVS

2.54ctw Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 17.71

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1.79ct Orange Hessonite Garnet, Cushion, VS

1.79ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 26.66

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0.54ct Pink Spinel, Cushion, VVS

0.54ct Pink Spinel, Cushion, VVS

5.2 x 4.3 mm

$ 37.65

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0.89ct Multicolor Chocolate Opal, Oval, Opaque

0.89ct Multicolor Chocolate Opal, Oval, Opaque

8 x 6 mm (calibrated)

$ 26.59

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0.77ct Multicolor Opal, Pear Shape, Transparent

0.77ct Multicolor Opal, Pear Shape, Transparent

8 x 6 mm (calibrated)

$ 19.17

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0.64ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.64ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.4 x 4.3 mm

$ 128.00

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15.42ctw Multicolor Jasper, Pear Shape, Opaque

15.42ctw Multicolor Jasper, Pear Shape, Opaque

21.6 x 12.8 mm

$ 9.06

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2.16ct Orange Hessonite Garnet, Cushion, VS-SI

2.16ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 38.73

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8.60ct Pink Kunzite, Pear Shape, VVS
Kunzite Product Video (409121)

8.60ct Pink Kunzite, Pear Shape, VVS

13.8 x 9.7 mm

$ 242.91

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8.87ctw White Quartz Cat'S Eye, Round, Transparent

8.87ctw White Quartz Cat'S Eye, Round, Transparent

10 mm (calibrated)

$ 35.34

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4.83ct Turquoise Grandidierite, Oval, SI

4.83ct Turquoise Grandidierite, Oval, SI

11.6 x 9.5 mm

$ 211.67

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8.04ct Pink Morganite, Pear Shape, Translucent

8.04ct Pink Morganite, Pear Shape, Translucent

19.7 x 11.8 mm

$ 88.09

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1.10ct Yellow Citrine, Trillion, VS

1.10ct Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 6.87

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18.65ct Violet Charoite, Pear Shape, Opaque

18.65ct Violet Charoite, Pear Shape, Opaque

22.3 x 15.1 mm

$ 30.83

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46.44ct Multicolor Jasper, Oval, Opaque

46.44ct Multicolor Jasper, Oval, Opaque

39.3 x 22.1 mm

$ 32.56

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7.37ct Pink Rose Quartz, Emerald Cut, Transparent

7.37ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 40.38

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6.46ct Multicolor Agate, Oval, Opaque

6.46ct Multicolor Agate, Oval, Opaque

11.1 x 10.3 mm

$ 5.15

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3.01ctw Orange Citrine, Pear Shape, VVS-VS

3.01ctw Orange Citrine, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 24.98

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25.09ctw Multicolor Jasper, Oval, Opaque

25.09ctw Multicolor Jasper, Oval, Opaque

27.3 x 13.6 mm

$ 14.24

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5.30ct Yellow Citrine, Round, VS
Citrine Product Video (389955)

5.30ct Yellow Citrine, Round, VS

12 mm (calibrated)

$ 46.46

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27.67ct Multicolor Jasper, Oval, Opaque

27.67ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 30.32

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0.73ct Orange Hessonite Garnet, Cushion, VS

0.73ct Orange Hessonite Garnet, Cushion, VS

5 x 5 mm (calibrated)

$ 10.86

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 -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky 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 -> 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

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate
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