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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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2.85ctw Multicolor Sapphire, Briolette, VVS

2.85ctw Multicolor Sapphire, Briolette, VVS

6.2 x 4.2 mm

$ 154.57

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0.76ct Yellow Citrine, Heart, VVS-VS

0.76ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 5.30

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7.90ct Green Amazonite, Marquise, Opaque

7.90ct Green Amazonite, Marquise, Opaque

18 x 9.1 mm

$ 19.31

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0.07ctw White Diamond, Round, VVS

0.07ctw White Diamond, Round, VVS

2 mm (calibrated)

$ 159.78

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5.91ctw White Moonstone, Round, Translucent

5.91ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 16.19

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46.54ct Violet Charoite, Fancy, Opaque
Charoite Product Video (566957)

46.54ct Violet Charoite, Fancy, Opaque

38.6 x 20.9 mm

$ 87.19

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1.07ctw White Rainbow Moonstone, Marquise, Transparent

1.07ctw White Rainbow Moonstone, Marquise, Transparent

8 x 4 mm (calibrated)

$ 35.18

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7.08ctw Orange Moonstone, Flower Cut, Translucent

7.08ctw Orange Moonstone, Flower Cut, Translucent

9 x 9 mm (calibrated)

$ 15.52

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2.19ct Orange Hessonite Garnet, Oval, VS-SI

2.19ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 38.65

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8.62ct Black Tourmaline, Cushion, Opaque

8.62ct Black Tourmaline, Cushion, Opaque

13.9 x 10.8 mm

$ 30.64

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1.37ct Purple Spinel, Cushion, VVS

1.37ct Purple Spinel, Cushion, VVS

6.6 x 5.7 mm

$ 227.42

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7.31ct Green Tourmaline, Oval, Transparent
Tourmaline Product Video (577375)

7.31ct Green Tourmaline, Oval, Transparent

14 x 10 mm (calibrated)

$ 85.86

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12.16ct White Rutile Quartz, Sphere / Ball, Translucent

12.16ct White Rutile Quartz, Sphere / Ball, Translucent

12 mm (calibrated)

$ 13.99

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19.30ct Multicolor Quartz With Marcasite, Oval, Transparent

19.30ct Multicolor Quartz With Marcasite, Oval, Transparent

23.7 x 15.8 mm

$ 126.87

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9.52ct White Jadeite, Oval, Translucent

9.52ct White Jadeite, Oval, Translucent

16.2 x 10.6 mm

$ 20.86

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3.90ctw White Topaz, Square, VS

3.90ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 29.91

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19.51ct Multicolor Labradorite, Pear Shape, Translucent

19.51ct Multicolor Labradorite, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 43.14

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27.22ct Black Nuummite, Oval, Opaque

27.22ct Black Nuummite, Oval, Opaque

24 x 16.9 mm

$ 118.39

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1.84ct White Rainbow Moonstone, Oval, Transparent

1.84ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 31.32

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10.27ct Yellow Rutile Quartz, Round, Translucent

10.27ct Yellow Rutile Quartz, Round, Translucent

15 mm (calibrated)

$ 27.90

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2.73ct Brown Smoky Quartz, Marquise, VVS

2.73ct Brown Smoky Quartz, Marquise, VVS

13.1 x 8 mm

$ 10.42

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3.32ct White Rainbow Moonstone, Oval, Transparent

3.32ct White Rainbow Moonstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 56.51

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9.19ct Brown Smoky Quartz, Emerald Cut, VVS-VS

9.19ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 18.03

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7.83ct Brown Tiger'S Eye, Baguette, Opaque

7.83ct Brown Tiger'S Eye, Baguette, Opaque

14.3 x 10.3 mm

$ 7.80

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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

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

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
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

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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