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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
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53.17ct Multicolor Tiger'S Eye Matrix, Fancy, Opaque

53.17ct Multicolor Tiger'S Eye Matrix, Fancy, Opaque

31.6 x 25.1 mm

$ 30.19

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17.19ct Green Maw-Sit-Sit, Oval, Opaque

17.19ct Green Maw-Sit-Sit, Oval, Opaque

16 x 13.4 mm

$ 56.51

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3.83ctw Brown Smoky Quartz, Round, VS

3.83ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 8.40

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0.90ct Yellow Beryl, Oval, VS

0.90ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 17.93

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1.88ctw Orange Citrine, Heart, VS

1.88ctw Orange Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 15.60

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2.32ct Green Tourmaline, Emerald Cut, VVS-VS

2.32ct Green Tourmaline, Emerald Cut, VVS-VS

20.6 x 3.7 mm

$ 63.54

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1.67ct Orange Zircon, Oval, VVS-VS

1.67ct Orange Zircon, Oval, VVS-VS

8.6 x 5.7 mm

$ 40.64

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20.00ct Bi-Color Ametrine, Oval, VS

20.00ct Bi-Color Ametrine, Oval, VS

20 x 15 mm (calibrated)

$ 153.38

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0.72ct Yellow Color-Change Garnet, Emerald Cut, VVS

0.72ct Yellow Color-Change Garnet, Emerald Cut, VVS

7 x 3.5 mm

$ 78.09

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35.44ct Violet Amethyst, Oval, IF
Amethyst Product Video (509137)

35.44ct Violet Amethyst, Oval, IF

23.9 x 18.7 mm

$ 271.80

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10.22ctw Violet Amethyst, Oval, Transparent

10.22ctw Violet Amethyst, Oval, Transparent

12 x 10 mm (calibrated)

$ 55.98

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0.56ct Green Peridot, Baguette, VVS-VS

0.56ct Green Peridot, Baguette, VVS-VS

6 x 4 mm (calibrated)

$ 8.37

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18.67ct Multicolor Jasper, Oval, Opaque

18.67ct Multicolor Jasper, Oval, Opaque

25.8 x 18.9 mm

$ 15.44

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0.94ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.94ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

5.9 x 4.7 mm

$ 38.84

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0.30ct Green Kornerupine, Baguette, VVS

0.30ct Green Kornerupine, Baguette, VVS

5.8 x 2.9 mm

$ 25.70

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5.07ct Pink Strawberry Quartz, Oval, Translucent

5.07ct Pink Strawberry Quartz, Oval, Translucent

11 x 9 mm (calibrated)

$ 38.89

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1.45ct Green Tourmaline, Emerald Cut, VVS-VS

1.45ct Green Tourmaline, Emerald Cut, VVS-VS

17.2 x 3.4 mm

$ 34.95

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2.06ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.06ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 34.40

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3.11ct Violet Amethyst, Trillion, VVS-VS

3.11ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 21.68

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1.67ct Yellow Citrine, Round, VVS-VS

1.67ct Yellow Citrine, Round, VVS-VS

8 mm (calibrated)

$ 13.30

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4.23ct Yellow Citrine, Oval, VVS-VS

4.23ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 33.71

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0.51ct Pink Tourmaline, Round, Transparent

0.51ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 20.32

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1.81ct Green Tourmaline, Oval, VVS-VS

1.81ct Green Tourmaline, Oval, VVS-VS

7.9 x 7 mm

$ 210.32

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1.29ct Multicolor Opal, Oval, Translucent

1.29ct Multicolor Opal, Oval, Translucent

10.1 x 7.3 mm

$ 32.12

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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

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 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

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

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate
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