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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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1.33ct Violet Amethyst, Round, Transparent

1.33ct Violet Amethyst, Round, Transparent

7 mm (calibrated)

$ 9.27

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41.61ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

41.61ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

16.3 mm

$ 91.18

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7.79ct Pink Rose Quartz, Emerald Cut, Transparent

7.79ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 42.68

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1.90ct Green Tourmaline, Emerald Cut, VS

1.90ct Green Tourmaline, Emerald Cut, VS

17.7 x 3.7 mm

$ 45.80

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2.21ct Green Tourmaline, Emerald Cut, VVS-VS

2.21ct Green Tourmaline, Emerald Cut, VVS-VS

26.9 x 3 mm

$ 55.03

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34.17ct Multicolor Obsidian, Oval, Opaque

34.17ct Multicolor Obsidian, Oval, Opaque

37.6 x 25.3 mm

$ 28.83

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28.95ct Multicolor Labradorite, Round, Translucent

28.95ct Multicolor Labradorite, Round, Translucent

25.1 mm

$ 53.34

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29.51ct Yellow Jadeite, Fancy, Translucent

29.51ct Yellow Jadeite, Fancy, Translucent

40 x 14.4 mm

$ 53.68

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5.95ctw Multicolor Pietersite, Pear Shape, Opaque

5.95ctw Multicolor Pietersite, Pear Shape, Opaque

15 x 10 mm (calibrated)

$ 13.93

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0.99ct Yellow Color-Change Diaspore, Pear Shape, VS

0.99ct Yellow Color-Change Diaspore, Pear Shape, VS

9.1 x 4.3 mm

$ 52.26

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1.23ct Yellow Color-Change Diaspore, Cushion, VVS

1.23ct Yellow Color-Change Diaspore, Cushion, VVS

7.3 x 5.9 mm

$ 64.93

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21.42ct White Howlite, Pear Shape, Opaque

21.42ct White Howlite, Pear Shape, Opaque

27.1 x 19 mm

$ 10.24

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3.63ct Green Tourmaline, Fancy, Translucent

3.63ct Green Tourmaline, Fancy, Translucent

14.8 x 11.5 mm

$ 39.77

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11.25ct Green Maw-Sit-Sit, Oval, Opaque

11.25ct Green Maw-Sit-Sit, Oval, Opaque

14 x 11.5 mm

$ 36.98

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1.77ct Violet Amethyst, Pear Shape, VVS-VS

1.77ct Violet Amethyst, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 11.64

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0.76ct Green Peridot, Oval, VVS

0.76ct Green Peridot, Oval, VVS

7 x 5 mm (calibrated)

$ 10.60

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8.91ct Brown Tiger'S Eye, Cushion, Opaque

8.91ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 8.87

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5.42ctw Yellow Citrine, Oval, VVS-VS

5.42ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 29.69

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2.28ct Yellow Citrine, Trillion, VVS-VS

2.28ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 17.49

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12.84ct White Rainbow Moonstone, Pear Shape, Transparent

12.84ct White Rainbow Moonstone, Pear Shape, Transparent

16 x 16 mm (calibrated)

$ 102.31

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22.26ctw Multicolor Fossil Coral, Oval, Opaque

22.26ctw Multicolor Fossil Coral, Oval, Opaque

20 x 12.9 mm

$ 25.36

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20.16ctw Multicolor Labradorite, Oval, Translucent

20.16ctw Multicolor Labradorite, Oval, Translucent

20 x 15 mm (calibrated)

$ 44.17

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9.27ctw Multicolor Pietersite, Fancy, Opaque

9.27ctw Multicolor Pietersite, Fancy, Opaque

24.3 x 11.8 mm

$ 22.71

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2.00ctw Blue Kyanite, Oval, SI

2.00ctw Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 54.78

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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

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 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

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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