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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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3.00ctw Green Peridot, Round, VVS-VS

3.00ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 49.30

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0.82ct Green Tourmaline, Oval, Transparent

0.82ct Green Tourmaline, Oval, Transparent

6.6 x 5 mm

$ 14.05

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2.32ctw Orange Sunstone, Oval, Translucent

2.32ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 11.86

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8.00ct Green Amazonite, Marquise, Opaque

8.00ct Green Amazonite, Marquise, Opaque

18.4 x 9.3 mm

$ 19.54

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12.73ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (407384)

12.73ct Yellow Apatite, Emerald Cut, VS

17 x 10.8 mm

$ 348.68

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1.24ct Orange Hessonite Garnet, Cushion, VVS-VS

1.24ct Orange Hessonite Garnet, Cushion, VVS-VS

7.4 x 5.2 mm

$ 24.70

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3.12ctw Purple Rhodolite Garnet, Trillion, VS

3.12ctw Purple Rhodolite Garnet, Trillion, VS

5.2 x 5.1 mm

$ 27.35

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0.97ct Red Spessartite Garnet, Briolette, VS-SI

0.97ct Red Spessartite Garnet, Briolette, VS-SI

5.7 x 4.2 mm

$ 33.18

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2.47ct Multicolor Labradorite, Marquise, Translucent

2.47ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 5.46

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0.60ct Green Tourmaline, Emerald Cut, VS

0.60ct Green Tourmaline, Emerald Cut, VS

5.5 x 3.8 mm

$ 29.88

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4.44ct Yellow Apatite, Oval, VS

4.44ct Yellow Apatite, Oval, VS

11.6 x 9.1 mm

$ 145.93

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22.64ctw Multicolor Fossil Coral, Pear Shape, Opaque

22.64ctw Multicolor Fossil Coral, Pear Shape, Opaque

22.4 x 12.7 mm

$ 24.80

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0.61ctw Blue Kyanite, Round, VS-SI

0.61ctw Blue Kyanite, Round, VS-SI

3.7 mm

$ 10.94

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0.90ct Yellow Citrine, Square, VVS-VS

0.90ct Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 6.27

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37.51ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent
Cat's Eye Aquamarine Product Video (382733)

37.51ct Turquoise Cat'S Eye Aquamarine, Oval, Translucent

21 x 18.8 mm

$ 499.38

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1.51ct Multicolor Opal, Oval, Transparent

1.51ct Multicolor Opal, Oval, Transparent

11.6 x 8.4 mm

$ 37.60

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13.85ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

13.85ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

18 x 13 mm (calibrated)

$ 16.83

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7.10ct Violet Amethyst, Marquise, VVS
Amethyst Product Video (655289)

7.10ct Violet Amethyst, Marquise, VVS

20 x 10 mm (calibrated)

$ 49.50

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2.90ct Pink Strawberry Quartz, Oval, Transparent

2.90ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 18.13

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1.37ct Green Tourmaline, Oval, Transparent

1.37ct Green Tourmaline, Oval, Transparent

7.6 x 5.7 mm

$ 19.57

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13.46ct Black Spinel, Baguette, Opaque

13.46ct Black Spinel, Baguette, Opaque

19.8 x 10.1 mm

$ 40.22

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9.35ct Violet Chalcedony, Cushion, Translucent

9.35ct Violet Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 34.92

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2.77ct Multicolor Tourmaline, Emerald Cut, VVS

2.77ct Multicolor Tourmaline, Emerald Cut, VVS

8.5 x 6.8 mm

$ 620.76

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0.81ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.81ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

7.7 x 4.1 mm

$ 30.09

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

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 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 -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 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 -> 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
→ View All GemSelect Reviews on Bizrate
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