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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
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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Yellow Untreated Gemstones
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4.41ct Violet Amethyst, Pear Shape, VVS

4.41ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 32.03

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67.02ct Multicolor Chrysocolla, Pear Shape, Opaque
Chrysocolla Product Video (658622)

67.02ct Multicolor Chrysocolla, Pear Shape, Opaque

34.3 x 32.1 mm

$ 114.14

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15.03ct Black Tourmaline, Oval, Opaque

15.03ct Black Tourmaline, Oval, Opaque

16.4 x 13.2 mm

$ 74.85

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29.52ct Multicolor Moss Agate, Pear Shape, Opaque

29.52ct Multicolor Moss Agate, Pear Shape, Opaque

31.7 x 23.5 mm

$ 29.40

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13.62ct Black Tourmaline, Oval, Opaque

13.62ct Black Tourmaline, Oval, Opaque

17.2 x 14.1 mm

$ 67.83

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2.04ct Orange Hessonite Garnet, Cushion, VS

2.04ct Orange Hessonite Garnet, Cushion, VS

8 x 6 mm (calibrated)

$ 40.64

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1.29ct Yellow Beryl, Oval, VVS-VS

1.29ct Yellow Beryl, Oval, VVS-VS

8.8 x 6.7 mm

$ 25.70

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0.57ct Green Peridot, Marquise, VS

0.57ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.52

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0.42ct Green Sphene, Oval, VS

0.42ct Green Sphene, Oval, VS

5.5 x 3.8 mm

$ 18.41

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2.52ct Yellow Citrine, Emerald Cut, VVS

2.52ct Yellow Citrine, Emerald Cut, VVS

10 x 7 mm (calibrated)

$ 17.57

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14.10ct Green Serpentine, Oval, Translucent
Serpentine Product Video (671552)

14.10ct Green Serpentine, Oval, Translucent

19 x 13.2 mm

$ 30.20

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2.68ct Violet Amethyst, Trillion, VVS-VS

2.68ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 21.36

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3.31ct Yellow Citrine, Emerald Cut, Transparent

3.31ct Yellow Citrine, Emerald Cut, Transparent

12 x 10 mm (calibrated)

$ 25.39

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4.24ct Yellow Citrine, Cushion, VVS-VS

4.24ct Yellow Citrine, Cushion, VVS-VS

12.9 x 7.3 mm

$ 32.52

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0.97ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

0.97ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

11.1 x 4.5 mm

$ 34.01

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0.92ctw Violet Amethyst, Oval, VVS

0.92ctw Violet Amethyst, Oval, VVS

6 x 4 mm (calibrated)

$ 7.33

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1.83ct Multicolor Spectrolite, Oval, Opaque

1.83ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 8.37

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12.79ct Brown Smoky Quartz, Round, VVS-VS

12.79ct Brown Smoky Quartz, Round, VVS-VS

16 mm (calibrated)

$ 15.55

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0.57ct Green Tourmaline, Emerald Cut, VS

0.57ct Green Tourmaline, Emerald Cut, VS

4.4 x 4.2 mm

$ 28.39

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1.17ct Yellow Beryl, Trillion, VVS

1.17ct Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 23.31

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11.30ct Multicolor Agate, Oval, Opaque

11.30ct Multicolor Agate, Oval, Opaque

13.1 x 11.9 mm

$ 11.25

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5.31ct Pink Rose Quartz, Emerald Cut, Transparent

5.31ct Pink Rose Quartz, Emerald Cut, Transparent

10.6 x 10.6 mm

$ 22.04

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76.71ctw Green Seraphinite, Sphere / Ball, Opaque
Seraphinite Product Video (447455)

76.71ctw Green Seraphinite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 126.06

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8.90ct Bi-Color Ametrine, Oval, VVS

8.90ct Bi-Color Ametrine, Oval, VVS

16.2 x 11.1 mm

$ 58.51

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

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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