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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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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.93ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.93ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.8 x 4.1 mm

$ 38.43

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19.39ct Violet Amethyst, Round, VVS

19.39ct Violet Amethyst, Round, VVS

18 mm (calibrated)

$ 135.19

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1.23ct Green Peridot, Oval, VVS-VS

1.23ct Green Peridot, Oval, VVS-VS

7.9 x 5.6 mm

$ 11.02

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46.03ct Multicolor Jasper, Round, Opaque

46.03ct Multicolor Jasper, Round, Opaque

24.6 mm

$ 26.14

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5.25ct Purple Kunzite, Cushion, VVS
Kunzite Product Video (691184)

5.25ct Purple Kunzite, Cushion, VVS

10.1 x 9.5 mm

$ 144.48

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27.55ct Blue Turquoise, Oval, Opaque

27.55ct Blue Turquoise, Oval, Opaque

24.4 x 16.2 mm

$ 82.32

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1.69ct Pink Morganite, Pear Shape, VS-SI
Morganite Product Video (457467)

1.69ct Pink Morganite, Pear Shape, VS-SI

11.5 x 6.4 mm

$ 140.27

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97.05ct Yellow Quartz, Oval, VVS
Quartz Product Video (470292)

97.05ct Yellow Quartz, Oval, VVS

37.5 x 22.6 mm

$ 132.91

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10.00ct Brown Tiger'S Eye, Oval, Opaque

10.00ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 5.88

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2.57ctw Orange Sunstone, Oval, Translucent

2.57ctw Orange Sunstone, Oval, Translucent

6 x 4 mm (calibrated)

$ 19.71

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6.13ct White Topaz, Cushion, VS

6.13ct White Topaz, Cushion, VS

11.2 x 10.1 mm

$ 40.70

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1.53ctw Red Rhodolite Garnet, Square, VS

1.53ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.39

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0.99ct Pink Morganite, Pear Shape, VVS-VS

0.99ct Pink Morganite, Pear Shape, VVS-VS

8.1 x 5.5 mm

$ 59.66

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1.17ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.17ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.7 x 5.7 mm

$ 3.69

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5.38ct Brown Smoky Quartz, Emerald Cut, VVS-VS

5.38ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 9.9 mm

$ 23.57

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13.98ctw Black Spinel, Heart, Opaque

13.98ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 76.58

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0.54ct Yellow Citrine, Trillion, VS

0.54ct Yellow Citrine, Trillion, VS

6 x 6 mm (calibrated)

$ 4.48

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1.15ct Green Sphene, Oval, Transparent

1.15ct Green Sphene, Oval, Transparent

7 x 6.1 mm

$ 5.73

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3.09ct Pink Morganite, Round, Transparent

3.09ct Pink Morganite, Round, Transparent

10 mm (calibrated)

$ 33.86

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0.64ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.64ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.2 x 4.1 mm

$ 132.80

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2.38ctw Multicolor Andalusite, Round, VS-SI

2.38ctw Multicolor Andalusite, Round, VS-SI

4 mm (calibrated)

$ 117.34

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2.69ct White Moonstone, Oval, Transparent

2.69ct White Moonstone, Oval, Transparent

10 x 8 mm (calibrated)

$ 23.57

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1.57ct Green Tourmaline, Emerald Cut, VVS-VS

1.57ct Green Tourmaline, Emerald Cut, VVS-VS

22.9 x 2.8 mm

$ 51.60

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.5 x 4.5 mm

$ 18.92

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

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
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

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
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
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