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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
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Violet Untreated Gemstones
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Yellow Untreated Gemstones
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2.54ct Yellow Citrine, Oval, Transparent

2.54ct Yellow Citrine, Oval, Transparent

10 x 8 mm (calibrated)

$ 19.48

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0.07ct Black Diamond, Round, Opaque
Diamond Product Video (702344)

0.07ct Black Diamond, Round, Opaque

2.5 mm (calibrated)

$ 20.60

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0.70ct Green Sphene, Oval, VS-SI

0.70ct Green Sphene, Oval, VS-SI

6.3 x 4.6 mm

$ 30.68

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5.56ctw Violet Amethyst, Oval, Transparent

5.56ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 30.46

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1.05ct White Rainbow Moonstone, Round, Transparent

1.05ct White Rainbow Moonstone, Round, Transparent

7 mm (calibrated)

$ 33.47

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5.28ct Violet Amethyst, Fancy, Transparent

5.28ct Violet Amethyst, Fancy, Transparent

12.2 x 9 mm

$ 31.56

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16.88ct Multicolor Agate, Round, Opaque

16.88ct Multicolor Agate, Round, Opaque

16 mm (calibrated)

$ 16.82

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3.43ct Yellow Citrine, Square, VS

3.43ct Yellow Citrine, Square, VS

9 x 9 mm (calibrated)

$ 26.30

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4.69ct Green Druzy Variscite, Fancy, Opaque

4.69ct Green Druzy Variscite, Fancy, Opaque

16 x 12 mm (calibrated)

$ 4.81

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1.33ct Green Tourmaline, Round, Transparent

1.33ct Green Tourmaline, Round, Transparent

7 mm (calibrated)

$ 22.80

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8.02ct Brown Moonstone, Oval, Translucent

8.02ct Brown Moonstone, Oval, Translucent

15 x 10 mm (calibrated)

$ 17.31

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0.43ct Pink Morganite, Oval, VVS-VS

0.43ct Pink Morganite, Oval, VVS-VS

6.1 x 4.3 mm

$ 17.85

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10.68ct Multicolor Pietersite, Oval, Opaque

10.68ct Multicolor Pietersite, Oval, Opaque

18 x 13 mm (calibrated)

$ 46.80

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12.54ct Bi-Color Ametrine, Cushion, VVS

12.54ct Bi-Color Ametrine, Cushion, VVS

16.8 x 13 mm

$ 93.67

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4.73ctw Orange Hessonite Garnet, Emerald Cut, VS

4.73ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 103.64

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2.58ct Multicolor Opal, Oval, Translucent

2.58ct Multicolor Opal, Oval, Translucent

13 x 9 mm (calibrated)

$ 64.24

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1.40ct Violet Amethyst, Pear Shape, VVS-VS

1.40ct Violet Amethyst, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 10.74

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2.07ctw Multicolor Andalusite, Oval, VS-SI

2.07ctw Multicolor Andalusite, Oval, VS-SI

6 x 4 mm (calibrated)

$ 85.05

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2.46ctw Red Pyrope Garnet, Marquise, VVS-VS

2.46ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5 mm

$ 21.56

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45.87ct Yellow Obsidian, Oval, Opaque

45.87ct Yellow Obsidian, Oval, Opaque

35 x 25.6 mm

$ 50.26

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1.42ct Purple Spinel, Cushion, VVS-VS

1.42ct Purple Spinel, Cushion, VVS-VS

6.7 x 5.9 mm

$ 105.02

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0.59ct Brown Chocolate Opal, Oval, Translucent

0.59ct Brown Chocolate Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 17.63

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12.50ct Green Druzy Variscite, Fancy, Opaque

12.50ct Green Druzy Variscite, Fancy, Opaque

21.2 x 20.8 mm

$ 19.06

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1.20ct Green Tourmaline, Emerald Cut, VS-SI

1.20ct Green Tourmaline, Emerald Cut, VS-SI

14 x 3.3 mm

$ 28.93

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

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 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 -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 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
→ View All GemSelect Reviews on Bizrate
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