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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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6.49ctw Multicolor Opal, Square, Transparent

6.49ctw Multicolor Opal, Square, Transparent

5 x 5 mm (calibrated)

$ 46.08

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4.62ct Multicolor Fire Agate, Fancy, Opaque

4.62ct Multicolor Fire Agate, Fancy, Opaque

13.5 x 10.5 mm

$ 35.52

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6.68ct Yellow Citrine, Round, VVS

6.68ct Yellow Citrine, Round, VVS

13 mm (calibrated)

$ 51.24

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0.64ct Yellow Citrine, Pear Shape, VVS

0.64ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.19

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1.58ct Yellow Citrine, Emerald Cut, VVS

1.58ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 12.59

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1.85ct Orange Zircon, Oval, VVS
Zircon Product Video (463415)

1.85ct Orange Zircon, Oval, VVS

8 x 6 mm (calibrated)

$ 30.41

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3.02ct Pink Kunzite, Emerald Cut, VS

3.02ct Pink Kunzite, Emerald Cut, VS

7.8 x 7.2 mm

$ 75.20

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1.23ct Yellow Citrine, Round, VVS-VS

1.23ct Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 8.17

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7.74ct Multicolor Pietersite, Oval, Opaque

7.74ct Multicolor Pietersite, Oval, Opaque

19.6 x 11.6 mm

$ 25.70

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15.22ct Black Tourmaline, Oval, Opaque

15.22ct Black Tourmaline, Oval, Opaque

16.8 x 14.2 mm

$ 75.80

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0.58ct Orange Spessartite Garnet, Pear Shape, VS-SI

0.58ct Orange Spessartite Garnet, Pear Shape, VS-SI

6 x 4 mm (calibrated)

$ 19.70

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32.74ct Multicolor Feather Pyrite, Oval, Opaque
Feather Pyrite Product Video (736374)

32.74ct Multicolor Feather Pyrite, Oval, Opaque

31.3 x 20.3 mm

$ 25.55

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0.40ct Yellow Citrine, Heart, VVS-VS

0.40ct Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 3.19

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1.80ct Green Tourmaline, Emerald Cut, VVS-VS

1.80ct Green Tourmaline, Emerald Cut, VVS-VS

16 x 3.7 mm

$ 47.33

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0.58ct Yellow Zircon, Oval, VVS

0.58ct Yellow Zircon, Oval, VVS

5 x 4 mm (calibrated)

$ 8.67

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15.82ct Black Obsidian, Trillion, Opaque

15.82ct Black Obsidian, Trillion, Opaque

23.6 x 20.4 mm

$ 26.00

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0.89ct Pink Strawberry Quartz, Oval, Translucent

0.89ct Pink Strawberry Quartz, Oval, Translucent

7.4 x 5.7 mm

$ 10.23

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3.40ctw Brown Smoky Quartz, Round, VS

3.40ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 6.77

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22.63ctw Multicolor Jasper, Sphere / Ball, Opaque

22.63ctw Multicolor Jasper, Sphere / Ball, Opaque

12 mm (calibrated)

$ 24.79

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15.03ct Green Maw-Sit-Sit, Oval, Opaque

15.03ct Green Maw-Sit-Sit, Oval, Opaque

15.6 x 13.3 mm

$ 49.40

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4.01ct Yellow Citrine, Oval, VVS-VS

4.01ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 24.07

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4.88ct Orange Sunstone, Oval, Translucent

4.88ct Orange Sunstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 28.44

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2.96ct Green Tourmaline, Cushion, VVS

2.96ct Green Tourmaline, Cushion, VVS

10.4 x 6.6 mm

$ 343.95

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1.48ctw Green Tsavorite Garnet, Baguette, VS

1.48ctw Green Tsavorite Garnet, Baguette, VS

3.2 x 2.1 mm

$ 89.18

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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 have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
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

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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