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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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15.43ct Pink Rose Quartz, Oval, Transparent

15.43ct Pink Rose Quartz, Oval, Transparent

18.6 x 14.1 mm

$ 33.81

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1.75ct Orange Hessonite Garnet, Cushion, VS

1.75ct Orange Hessonite Garnet, Cushion, VS

8 x 6 mm (calibrated)

$ 31.37

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38.55ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

38.55ct Multicolor Rhodochrosite, Sphere / Ball, Opaque

15.9 mm

$ 84.47

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0.87ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.87ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.9 x 4 mm

$ 30.54

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3.39ct Yellow Citrine, Pear Shape, VVS-VS

3.39ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 21.27

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4.09ctw Orange Moonstone, Cushion, Translucent

4.09ctw Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 8.15

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2.15ct White Rainbow Moonstone, Oval, Transparent

2.15ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 36.59

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0.78ct Blue Kyanite, Round, VS

0.78ct Blue Kyanite, Round, VS

5 mm (calibrated)

$ 15.54

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13.34ctw Yellow Rutile Quartz, Oval, Transparent

13.34ctw Yellow Rutile Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 51.15

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6.20ct Multicolor Boulder Opal, Oval, Opaque

6.20ct Multicolor Boulder Opal, Oval, Opaque

22.9 x 7.6 mm

$ 43.23

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1.76ct Orange Hessonite Garnet, Oval, VS

1.76ct Orange Hessonite Garnet, Oval, VS

8.5 x 6.9 mm

$ 52.43

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31.26ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

31.26ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

30.4 x 17.8 mm

$ 18.06

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7.43ct Pink Morganite, Trillion, Translucent

7.43ct Pink Morganite, Trillion, Translucent

13 x 13 mm (calibrated)

$ 81.41

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3.61ctw Orange Moonstone, Trillion, Translucent

3.61ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 7.91

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1.66ct Purple Spinel, Cushion, VS

1.66ct Purple Spinel, Cushion, VS

7.1 x 5.6 mm

$ 115.74

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0.49ct Green Chrome Diopside, Oval, VS

0.49ct Green Chrome Diopside, Oval, VS

6 x 4 mm (calibrated)

$ 12.20

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1.38ct Violet Amethyst, Marquise, VS

1.38ct Violet Amethyst, Marquise, VS

11.9 x 5.6 mm

$ 10.59

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0.78ct Yellow Citrine, Marquise, VVS-VS

0.78ct Yellow Citrine, Marquise, VVS-VS

9 x 5.1 mm

$ 6.22

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3.06ct Yellow Citrine, Oval, VVS-VS

3.06ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 19.11

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27.40ctw Multicolor Fossil Coral, Fancy, Opaque

27.40ctw Multicolor Fossil Coral, Fancy, Opaque

24.7 x 11.5 mm

$ 45.03

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16.25ct Violet Charoite, Cushion, Opaque

16.25ct Violet Charoite, Cushion, Opaque

16.8 x 13.2 mm

$ 26.88

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23.92ct Yellow Calcite, Pear Shape, Translucent

23.92ct Yellow Calcite, Pear Shape, Translucent

29.4 x 16.8 mm

$ 16.43

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2.08ct Yellow Citrine, Trillion, VS

2.08ct Yellow Citrine, Trillion, VS

9 x 9 mm (calibrated)

$ 15.95

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8.63ct Pink Rose Quartz, Emerald Cut, Transparent

8.63ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 47.28

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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

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

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