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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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10.54ct Red Almandine Garnet, Oval, VS

10.54ct Red Almandine Garnet, Oval, VS

14.8 x 10.9 mm

$ 314.94

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1.33ct Yellow Beryl, Oval, VVS

1.33ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 26.49

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32.69ct White Dendritic Agate, Fancy, Opaque
Dendritic Agate Product Video (659277)

32.69ct White Dendritic Agate, Fancy, Opaque

28.2 x 21.2 mm

$ 65.12

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0.45ct Yellow Color-Change Diaspore, Oval, VVS

0.45ct Yellow Color-Change Diaspore, Oval, VVS

5 x 4.3 mm

$ 23.75

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1.90ct Orange Citrine, Round, VVS-VS

1.90ct Orange Citrine, Round, VVS-VS

8 mm (calibrated)

$ 15.77

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2.50ct Orange Hessonite Garnet, Cushion, VS-SI

2.50ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 46.56

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1.35ct Green Tourmaline, Emerald Cut, VVS-VS

1.35ct Green Tourmaline, Emerald Cut, VVS-VS

15.7 x 3.4 mm

$ 28.82

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16.56ct Pink Kunzite, Pear Shape, VVS-VS
Kunzite Product Video (710240)

16.56ct Pink Kunzite, Pear Shape, VVS-VS

20 x 12.8 mm

$ 437.09

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31.64ct White Dendritic Agate, Pear Shape, Opaque

31.64ct White Dendritic Agate, Pear Shape, Opaque

35.6 x 22.9 mm

$ 63.03

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1.05ct Yellow Citrine, Square, VS

1.05ct Yellow Citrine, Square, VS

6 x 6 mm (calibrated)

$ 4.80

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1.37ct Brown Color-Change Garnet, Pear Shape, VS

1.37ct Brown Color-Change Garnet, Pear Shape, VS

7.1 x 6 mm

$ 109.45

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1.46ctw Yellow Citrine, Pear Shape, VVS-VS

1.46ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 11.64

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1.36ct Blue Kyanite, Oval, SI

1.36ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 33.86

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7.60ct Multicolor Cinnabar, Cushion, Opaque

7.60ct Multicolor Cinnabar, Cushion, Opaque

13.7 x 13.3 mm

$ 8.90

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7.01ct Brown Smoky Quartz, Emerald Cut, VVS

7.01ct Brown Smoky Quartz, Emerald Cut, VVS

11.5 x 11.5 mm

$ 8.37

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28.97ct Brown Moonstone, Oval, Opaque

28.97ct Brown Moonstone, Oval, Opaque

22.3 x 16.3 mm

$ 63.48

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13.07ctw Brown Smoky Quartz, Pear Shape, VVS-VS

13.07ctw Brown Smoky Quartz, Pear Shape, VVS-VS

15.1 x 11 mm

$ 21.48

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1.00ctw Red Pyrope Garnet, Square, VS

1.00ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 7.67

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1.23ct Multicolor Opal, Oval, Transparent

1.23ct Multicolor Opal, Oval, Transparent

10.8 x 7.4 mm

$ 30.63

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3.68ct Pink Morganite, Trillion, Translucent

3.68ct Pink Morganite, Trillion, Translucent

11 x 11 mm (calibrated)

$ 40.32

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15.40ctw Multicolor Fossil Coral, Oval, Opaque

15.40ctw Multicolor Fossil Coral, Oval, Opaque

17 x 11.7 mm

$ 16.87

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3.15ct White Topaz, Round, VS

3.15ct White Topaz, Round, VS

8.5 mm (calibrated)

$ 20.71

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1.83ct Red Almandine Garnet, Marquise, VVS

1.83ct Red Almandine Garnet, Marquise, VVS

12 x 6 mm (calibrated)

$ 68.35

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3.81ct Red Sunstone, Oval, Translucent

3.81ct Red Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 23.25

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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 -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 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

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

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
→ View All GemSelect Reviews on Bizrate
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