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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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3.01ct Green Tourmaline, Emerald Cut, VS
Tourmaline Product Video (347663)

3.01ct Green Tourmaline, Emerald Cut, VS

22.4 x 4 mm

$ 148.40

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3.56ctw Orange Hessonite Garnet, Emerald Cut, VS

3.56ctw Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 70.21

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0.60ct Yellow Color-Change Garnet, Emerald Cut, VS

0.60ct Yellow Color-Change Garnet, Emerald Cut, VS

7.1 x 3.5 mm

$ 72.01

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6.22ct Violet Amethyst, Pear Shape, Transparent

6.22ct Violet Amethyst, Pear Shape, Transparent

16.4 x 9.5 mm

$ 37.17

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17.33ctw Green Amazonite, Marquise, Opaque

17.33ctw Green Amazonite, Marquise, Opaque

19.9 x 10.1 mm

$ 13.80

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13.46ctw Black Spinel, Heart, Opaque

13.46ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 73.74

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0.67ct Yellow Sphalerite, Round, SI-I1

0.67ct Yellow Sphalerite, Round, SI-I1

4.5 mm (calibrated)

$ 33.37

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3.30ctw Yellow Citrine, Square, VS

3.30ctw Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 22.92

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0.96ct Yellow Sphalerite, Oval, SI-I1

0.96ct Yellow Sphalerite, Oval, SI-I1

6 x 5 mm

$ 47.81

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8.02ctw Red Pyrope Garnet, Marquise, VVS-VS
Pyrope Garnet Product Video (462065)

8.02ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6 mm (calibrated)

$ 79.34

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1.09ct Multicolor Opal, Marquise, Transparent

1.09ct Multicolor Opal, Marquise, Transparent

13.8 x 5.6 mm

$ 48.85

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34.63ct Multicolor Jasper, Fancy, Opaque

34.63ct Multicolor Jasper, Fancy, Opaque

27.6 x 23.6 mm

$ 16.43

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1.62ct Pink Tourmaline, Oval, Transparent

1.62ct Pink Tourmaline, Oval, Transparent

7.6 x 5.7 mm

$ 40.34

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4.97ctw Multicolor Labradorite, Round, Translucent

4.97ctw Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 12.08

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8.20ct Brown Smoky Quartz, Round, VS

8.20ct Brown Smoky Quartz, Round, VS

14 mm (calibrated)

$ 13.48

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0.06ct Black Diamond, Round, Opaque

0.06ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 15.94

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51.51ct Multicolor Variscite, Cushion, Opaque
Variscite Product Video (472206)

51.51ct Multicolor Variscite, Cushion, Opaque

33.9 x 29.9 mm

$ 41.77

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15.01ctw Green Prehnite, Fancy, Transparent

15.01ctw Green Prehnite, Fancy, Transparent

18.2 x 11.8 mm

$ 23.51

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2.31ct Green Sphene, Oval, SI
Sphene Product Video (413957)

2.31ct Green Sphene, Oval, SI

9.1 x 6.7 mm

$ 253.08

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5.53ct Violet Amethyst, Briolette, VS

5.53ct Violet Amethyst, Briolette, VS

13.4 x 7.9 mm

$ 20.19

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8.63ct Pink Kunzite, Pear Shape, VVS
Kunzite Product Video (694868)

8.63ct Pink Kunzite, Pear Shape, VVS

15 x 10 mm (calibrated)

$ 214.89

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24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

24.43ctw Brown Tiger'S Eye, Sphere / Ball, Opaque

12 mm (calibrated)

$ 15.26

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10.07ct Orange Moonstone, Round, Opaque

10.07ct Orange Moonstone, Round, Opaque

14 mm (calibrated)

$ 20.16

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3.84ctw Orange Hessonite Garnet, Square, VS

3.84ctw Orange Hessonite Garnet, Square, VS

6.7 x 6.6 mm

$ 84.15

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

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
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 -> 10 star ratings

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

Posted By Ron T in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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