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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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1.09ct Green Tourmaline, Emerald Cut, VVS

1.09ct Green Tourmaline, Emerald Cut, VVS

12.5 x 3.8 mm

$ 23.84

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45.37ctw Brown Smoky Quartz, Sphere / Ball, Transparent

45.37ctw Brown Smoky Quartz, Sphere / Ball, Transparent

10 mm (calibrated)

$ 72.08

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0.22ctw White Diamond, Round, VVS-VS
Diamond Product Video (567429)

0.22ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 393.30

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2.19ct Yellow Citrine, Trillion, VVS-VS

2.19ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 16.79

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1.98ct Green Prehnite, Oval, Transparent/Translucent

1.98ct Green Prehnite, Oval, Transparent/Translucent

9 x 6 mm (calibrated)

$ 5.87

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0.77ct Green Tourmaline, Emerald Cut, VVS-VS

0.77ct Green Tourmaline, Emerald Cut, VVS-VS

11.7 x 3 mm

$ 25.31

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58.38ct Violet Charoite, Oval, Opaque

58.38ct Violet Charoite, Oval, Opaque

39.8 x 23.5 mm

$ 95.96

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2.16ct Green Prehnite, Oval, Transparent

2.16ct Green Prehnite, Oval, Transparent

8 x 6.4 mm

$ 13.94

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77.89ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque
Rhodochrosite Product Video (447524)

77.89ctw Multicolor Rhodochrosite, Sphere / Ball, Opaque

16.2 mm

$ 170.67

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29.82ct Gray Hematite, Pear Shape, Opaque

29.82ct Gray Hematite, Pear Shape, Opaque

22.4 x 15.2 mm

$ 30.05

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1.85ct Violet Amethyst, Marquise, VS

1.85ct Violet Amethyst, Marquise, VS

11.8 x 6 mm

$ 12.16

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2.00ct Green Peridot, Cushion, VVS-VS

2.00ct Green Peridot, Cushion, VVS-VS

7.5 x 7 mm

$ 78.44

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22.59ctw Multicolor Fossil Coral, Oval, Opaque

22.59ctw Multicolor Fossil Coral, Oval, Opaque

19.4 x 11.8 mm

$ 37.13

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3.14ctw Orange Sunstone, Oval, Translucent

3.14ctw Orange Sunstone, Oval, Translucent

9 x 7 mm (calibrated)

$ 18.77

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1.24ct Yellow Citrine, Emerald Cut, VVS

1.24ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 8.65

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1.21ct Orange Hessonite Garnet, Baguette, SI

1.21ct Orange Hessonite Garnet, Baguette, SI

7 x 5 mm (calibrated)

$ 26.51

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1.55ct Violet Spinel, Cushion, VS

1.55ct Violet Spinel, Cushion, VS

7 x 5.8 mm

$ 258.13

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5.53ct White Topaz, Oval, VVS-VS

5.53ct White Topaz, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 36.72

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3.73ct Yellow Citrine, Oval, VS

3.73ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 28.60

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0.77ct Yellow Beryl, Oval, VS

0.77ct Yellow Beryl, Oval, VS

7 x 5 mm (calibrated)

$ 14.70

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30.83ct Yellow Obsidian, Oval, Opaque

30.83ct Yellow Obsidian, Oval, Opaque

33.4 x 22.2 mm

$ 23.02

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3.38ct Pink Kunzite, Oval, VS

3.38ct Pink Kunzite, Oval, VS

9 x 7 mm (calibrated)

$ 100.99

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22.73ct Yellow Rutile Quartz, Pear Shape, Translucent

22.73ct Yellow Rutile Quartz, Pear Shape, Translucent

24.4 x 15.7 mm

$ 24.90

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1.10ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.10ct Gray Sillimanite Cat'S Eye, Oval, Transparent

8 x 5 mm (calibrated)

$ 3.62

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 -> 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

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
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 feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
Source: Bizrate
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