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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

Size Explained

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For Example: 8-9
Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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3.51ct Yellow Prehnite, Oval, Transparent/Translucent

3.51ct Yellow Prehnite, Oval, Transparent/Translucent

9.2 x 8 mm

$ 32.93

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1.18ct Orange Hessonite Garnet, Oval, VS

1.18ct Orange Hessonite Garnet, Oval, VS

7.5 x 6.1 mm

$ 18.03

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1.38ct Multicolor Opal, Oval, Translucent

1.38ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 31.03

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1.48ctw Yellow Citrine, Heart, VS

1.48ctw Yellow Citrine, Heart, VS

6 x 6 mm (calibrated)

$ 10.32

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3.58ct White Moonstone, Oval, Translucent

3.58ct White Moonstone, Oval, Translucent

11 x 8.2 mm

$ 32.69

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0.55ct Brown Color-Change Garnet, Pear Shape, VVS

0.55ct Brown Color-Change Garnet, Pear Shape, VVS

6 x 4 mm (calibrated)

$ 59.66

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3.25ct Orange Spessartite Garnet, Oval, Transparent

3.25ct Orange Spessartite Garnet, Oval, Transparent

8.3 x 7.3 mm

$ 80.93

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6.77ctw Black Spinel, Round, Opaque

6.77ctw Black Spinel, Round, Opaque

9.5 mm (calibrated)

$ 22.25

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3.27ct Violet Amethyst, Pear Shape, VVS

3.27ct Violet Amethyst, Pear Shape, VVS

14 x 9 mm (calibrated)

$ 22.80

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4.70ctw Pink Strawberry Quartz, Oval, Transparent

4.70ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 72.09

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1.36ct Purple Tourmaline, Oval, Transparent

1.36ct Purple Tourmaline, Oval, Transparent

7.6 x 5.8 mm

$ 19.43

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3.56ctw Red Pyrope Garnet, Square, VVS-VS

3.56ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 27.30

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1.18ctw Orange Zircon, Oval, VVS

1.18ctw Orange Zircon, Oval, VVS

5.2 x 4.2 mm

$ 29.38

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21.10ct Pink Rose Quartz, Oval, Transparent/Translucent

21.10ct Pink Rose Quartz, Oval, Transparent/Translucent

18.6 x 15.2 mm

$ 30.05

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1.33ct Orange Moonstone, Marquise, Translucent

1.33ct Orange Moonstone, Marquise, Translucent

9.4 x 5.1 mm

$ 2.65

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0.96ct Multicolor Opal, Oval, Translucent

0.96ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 42.07

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4.64ctw Pink Rose Quartz, Emerald Cut, Transparent

4.64ctw Pink Rose Quartz, Emerald Cut, Transparent

8.6 x 8.5 mm

$ 25.41

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0.60ct Green Peridot, Emerald Cut, VVS

0.60ct Green Peridot, Emerald Cut, VVS

6 x 4 mm (calibrated)

$ 8.96

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2.82ctw Brown Smoky Quartz, Baguette, VVS

2.82ctw Brown Smoky Quartz, Baguette, VVS

9 x 6 mm (calibrated)

$ 19.66

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5.77ct Brown Rutile Quartz, Round, Translucent

5.77ct Brown Rutile Quartz, Round, Translucent

12 mm (calibrated)

$ 14.48

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5.56ct Pink Rose Quartz, Emerald Cut, Transparent

5.56ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 30.46

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1.36ctw Red Rhodolite Garnet, Square, VS

1.36ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.91

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22.90ct Green Amazonite, Fancy, Opaque

22.90ct Green Amazonite, Fancy, Opaque

37.7 x 9.1 mm

$ 4.57

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7.64ct Multicolor Coral, Oval, Translucent

7.64ct Multicolor Coral, Oval, Translucent

16 x 12 mm (calibrated)

$ 23.85

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

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
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

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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