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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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0.86ct Multicolor Opal, Round, Transparent
Opal Product Video (540982)

0.86ct Multicolor Opal, Round, Transparent

7 mm (calibrated)

$ 17.65

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1.81ctw Green Demantoid Garnet, Oval, VS

1.81ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 180.28

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0.63ctw Yellow Spessartite Garnet, Oval, VS

0.63ctw Yellow Spessartite Garnet, Oval, VS

4.9 x 3.2 mm

$ 21.96

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1.40ct Green Tourmaline, Emerald Cut, VVS-VS

1.40ct Green Tourmaline, Emerald Cut, VVS-VS

16.5 x 3.3 mm

$ 33.47

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0.27ctw Black Diamond, Round, Opaque

0.27ctw Black Diamond, Round, Opaque

3 mm (calibrated)

$ 128.44

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4.00ct Brown Moonstone, Oval, Translucent

4.00ct Brown Moonstone, Oval, Translucent

13.3 x 7.7 mm

$ 7.85

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9.37ct Green Druzy Variscite, Fancy, Opaque

9.37ct Green Druzy Variscite, Fancy, Opaque

27.3 x 11.6 mm

$ 9.61

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4.87ct Brown Moonstone, Oval, Translucent

4.87ct Brown Moonstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 10.72

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0.06ct White Diamond, Marquise, VVS

0.06ct White Diamond, Marquise, VVS

4 x 2 mm (calibrated)

$ 208.54

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1.69ct Orange Hessonite Garnet, Oval, VS

1.69ct Orange Hessonite Garnet, Oval, VS

8.1 x 6.4 mm

$ 29.49

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17.78ctw Multicolor Jasper, Oval, Opaque

17.78ctw Multicolor Jasper, Oval, Opaque

24.9 x 12.6 mm

$ 10.45

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1.20ct Green Chrysoberyl, Pear Shape, VVS
Chrysoberyl Product Video (366577)

1.20ct Green Chrysoberyl, Pear Shape, VVS

8 x 6 mm (calibrated)

$ 127.13

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1.13ctw Green Peridot, Marquise, VS

1.13ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 16.88

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2.21ct Green Tourmaline, Emerald Cut, VVS

2.21ct Green Tourmaline, Emerald Cut, VVS

17.6 x 4 mm

$ 60.54

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21.34ct Multicolor Pietersite, Oval, Opaque

21.34ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 93.52

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0.68ct Green Peridot, Oval, VVS-VS

0.68ct Green Peridot, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 12.19

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4.66ct Violet Amethyst, Pear Shape, VS

4.66ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 35.74

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25.42ctw Multicolor Labradorite, Round, Translucent

25.42ctw Multicolor Labradorite, Round, Translucent

20 mm (calibrated)

$ 55.69

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5.95ctw Red Almandine Garnet, Round, Transparent

5.95ctw Red Almandine Garnet, Round, Transparent

3.2 mm

$ 32.60

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1.21ct Green Chrysoprase, Pear Shape, Translucent

1.21ct Green Chrysoprase, Pear Shape, Translucent

9.3 x 6.5 mm

$ 10.04

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0.26ct Violet Iolite, Baguette, VS

0.26ct Violet Iolite, Baguette, VS

5 x 3 mm (calibrated)

$ 10.36

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1.19ct Orange Hessonite Garnet, Oval, VVS-VS

1.19ct Orange Hessonite Garnet, Oval, VVS-VS

7.4 x 5.5 mm

$ 23.70

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7.32ct Multicolor Boulder Opal, Oval, Opaque

7.32ct Multicolor Boulder Opal, Oval, Opaque

14.4 x 10.5 mm

$ 36.45

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1.69ctw Red Pyrope Garnet, Heart, VVS-VS

1.69ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.96

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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 current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 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

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

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