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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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2.30ct Pink Strawberry Quartz, Oval, Transparent

2.30ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 17.09

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3.40ctw Orange Sunstone, Oval, Translucent

3.40ctw Orange Sunstone, Oval, Translucent

7 x 5 mm (calibrated)

$ 26.08

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3.51ct Yellow Citrine, Pear Shape, VVS

3.51ct Yellow Citrine, Pear Shape, VVS

10.4 x 10.9 mm

$ 26.93

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0.83ct Green Peridot, Oval, VS

0.83ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.79

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0.75ct Blue Kyanite, Round, SI

0.75ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 18.68

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11.61ct Pink Rose Quartz, Emerald Cut, Transparent

11.61ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 63.60

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1.56ct Violet Spinel, Cushion, VVS

1.56ct Violet Spinel, Cushion, VVS

6.8 x 6.4 mm

$ 106.66

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0.73ctw Blue Kyanite, Oval, SI-I1

0.73ctw Blue Kyanite, Oval, SI-I1

5.1 x 3.3 mm

$ 15.99

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0.94ctw White Rainbow Moonstone, Oval, Transparent

0.94ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 30.91

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1.33ctw Orange Hessonite Garnet, Square, VS

1.33ctw Orange Hessonite Garnet, Square, VS

3.4 x 3.4 mm

$ 28.29

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1.86ct Brown Rutile Quartz, Oval, Transparent

1.86ct Brown Rutile Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 3.77

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1.78ct Brown Color-Change Garnet, Oval, VVS-VS

1.78ct Brown Color-Change Garnet, Oval, VVS-VS

7.6 x 6.3 mm

$ 142.20

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1.40ct Green Sphene, Oval, Transparent

1.40ct Green Sphene, Oval, Transparent

7.6 x 5.7 mm

$ 6.97

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2.78ct Violet Amethyst, Trillion, VVS-VS

2.78ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.38

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33.84ct Gray Hematite, Pear Shape, Opaque

33.84ct Gray Hematite, Pear Shape, Opaque

24.8 x 16 mm

$ 33.00

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2.86ct Multicolor Pietersite, Marquise, Opaque

2.86ct Multicolor Pietersite, Marquise, Opaque

16.2 x 7.4 mm

$ 6.92

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4.41ctw Red Pyrope Garnet, Square, VS

4.41ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 33.82

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4.31ctw Yellow Citrine, Oval, VVS-VS

4.31ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 23.61

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1.40ctw Yellow Zircon, Oval, VVS

1.40ctw Yellow Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 34.86

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0.92ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.92ct Gray Cat'S Eye Alexandrite, Oval, Opaque

6 x 4 mm (calibrated)

$ 190.90

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9.46ct Yellow Citrine, Oval, VVS-VS

9.46ct Yellow Citrine, Oval, VVS-VS

16.8 x 11.3 mm

$ 56.53

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4.45ct Yellow Citrine, Emerald Cut, VVS-VS

4.45ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 34.13

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2.17ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.17ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 40.42

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3.05ct Violet Amethyst, Trillion, VVS-VS

3.05ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 21.26

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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 -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
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Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
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Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate
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