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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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4.38ct Yellow Citrine, Oval, VVS-VS

4.38ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 33.60

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5.34ctw Green Peridot, Oval, VS

5.34ctw Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 58.51

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12.55ct Brown Moonstone, Fancy, Translucent

12.55ct Brown Moonstone, Fancy, Translucent

20.3 x 12.4 mm

$ 14.44

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0.78ct Pink Morganite, Pear Shape, VVS

0.78ct Pink Morganite, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 32.37

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2.07ctw Multicolor Opal, Round, Transparent

2.07ctw Multicolor Opal, Round, Transparent

7 mm (calibrated)

$ 50.83

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0.21ct Turquoise Aquamarine, Pear Shape, VS

0.21ct Turquoise Aquamarine, Pear Shape, VS

4 x 4 mm (calibrated)

$ 29.28

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27.00ct Multicolor Matrix Opal, Oval, Opaque

27.00ct Multicolor Matrix Opal, Oval, Opaque

29.1 x 21 mm

$ 45.72

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2.76ct Turquoise Grandidierite, Oval, VS-SI
Grandidierite Product Video (471959)

2.76ct Turquoise Grandidierite, Oval, VS-SI

9.5 x 7.1 mm

$ 1,209.54

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7.95ctw Brown Tiger'S Eye, Oval, Opaque

7.95ctw Brown Tiger'S Eye, Oval, Opaque

12.3 x 8.4 mm

$ 11.89

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3.90ct Pink Strawberry Quartz, Oval, Translucent

3.90ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 23.51

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6.91ct Pink Kunzite, Cushion, VS

6.91ct Pink Kunzite, Cushion, VS

11 x 9.7 mm

$ 172.06

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7.57ctw Green Prehnite, Round, Transparent/Translucent

7.57ctw Green Prehnite, Round, Transparent/Translucent

8 mm (calibrated)

$ 41.48

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6.84ct White Dendritic Agate, Pear Shape, Opaque

6.84ct White Dendritic Agate, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 5.44

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4.86ctw White Topaz, Cushion, VVS-VS

4.86ctw White Topaz, Cushion, VVS-VS

4.5 x 4.5 mm

$ 26.63

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1.76ct Orange Hessonite Garnet, Emerald Cut, VS

1.76ct Orange Hessonite Garnet, Emerald Cut, VS

6 x 6 mm (calibrated)

$ 34.71

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3.67ctw Brown Smoky Quartz, Round, VVS-VS

3.67ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 6.03

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75.20ct Blue Sodalite, Square, Opaque

75.20ct Blue Sodalite, Square, Opaque

25.9 x 25.6 mm

$ 62.42

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3.08ct Violet Amethyst, Trillion, VS

3.08ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 23.09

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2.80ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.80ctw White Sillimanite Cat'S Eye, Oval, Translucent

8 x 5.3 mm

$ 11.11

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0.68ct Purple Spinel, Round, VS

0.68ct Purple Spinel, Round, VS

5 mm (calibrated)

$ 29.23

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2.13ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.13ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 35.15

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1.93ct Orange Moonstone, Cushion, Translucent

1.93ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 3.84

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18.74ct Bi-Color Ametrine, Oval, VS

18.74ct Bi-Color Ametrine, Oval, VS

19.7 x 15.8 mm

$ 123.19

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34.18ct Multicolor Pietersite, Oval, Opaque

34.18ct Multicolor Pietersite, Oval, Opaque

20.2 x 22.2 mm

$ 112.34

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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

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

overall great

Posted By SR in April, 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

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

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

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate
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