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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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Yellow Untreated Gemstones
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6.26ctw White Moonstone, Round, Translucent

6.26ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 17.15

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0.68ct Green Peridot, Marquise, VVS-VS

0.68ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 10.84

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1.26ctw Yellow Citrine, Pear Shape, VVS-VS

1.26ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 8.28

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1.35ct Violet Amethyst, Marquise, VS

1.35ct Violet Amethyst, Marquise, VS

12.1 x 5.5 mm

$ 10.36

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4.58ct Purple Rhodolite Garnet, Pear Shape, VVS
Rhodolite Garnet Product Video (745507)

4.58ct Purple Rhodolite Garnet, Pear Shape, VVS

11 x 9 mm (calibrated)

$ 190.07

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59.90ct Blue Turquoise, Oval, Opaque
Turquoise Product Video (724847)

59.90ct Blue Turquoise, Oval, Opaque

27.9 x 20.7 mm

$ 149.15

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41.95ct Black Tourmaline, Emerald Cut, Opaque
Tourmaline Product Video (668113)

41.95ct Black Tourmaline, Emerald Cut, Opaque

25.4 x 16.9 mm

$ 208.91

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27.68ctw Multicolor Jasper, Fancy, Opaque

27.68ctw Multicolor Jasper, Fancy, Opaque

34 x 16.7 mm

$ 45.48

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1.43ctw Red Pyrope Garnet, Square, VS

1.43ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 10.96

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3.05ct Green Prehnite, Oval, Transparent

3.05ct Green Prehnite, Oval, Transparent

9 x 8.2 mm

$ 23.40

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10.66ct Brown Tiger'S Eye, Baguette, Opaque

10.66ct Brown Tiger'S Eye, Baguette, Opaque

16 x 12 mm (calibrated)

$ 13.80

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1.02ctw Blue Kyanite, Round, VS-SI

1.02ctw Blue Kyanite, Round, VS-SI

5 mm (calibrated)

$ 20.32

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2.42ct White Moonstone, Oval, Transparent

2.42ct White Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 21.21

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7.68ct Blue Larimar, Oval, Opaque

7.68ct Blue Larimar, Oval, Opaque

14 x 10 mm (calibrated)

$ 90.89

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2.93ct Violet Amethyst, Pear Shape, VS

2.93ct Violet Amethyst, Pear Shape, VS

13 x 9 mm (calibrated)

$ 22.47

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19.61ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

19.61ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

29.9 x 12.9 mm

$ 19.53

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1.98ct Yellow Beryl, Round, VVS-VS

1.98ct Yellow Beryl, Round, VVS-VS

9 mm (calibrated)

$ 47.33

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25.83ct Violet Amethyst, Round, VVS

25.83ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 180.09

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0.97ct Yellow Morganite, Pear Shape, VVS-VS

0.97ct Yellow Morganite, Pear Shape, VVS-VS

8 x 6 mm (calibrated)

$ 42.51

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1.64ct Purple Rhodolite Garnet, Oval, VS

1.64ct Purple Rhodolite Garnet, Oval, VS

7.9 x 6.7 mm

$ 67.27

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14.00ct Yellow Rutile Quartz, Fancy, Transparent

14.00ct Yellow Rutile Quartz, Fancy, Transparent

17.5 x 13.7 mm

$ 38.35

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6.18ct Brown Tiger'S Eye, Baguette, Opaque

6.18ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 3.39

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0.55ct Yellow Color-Change Diaspore, Square, VVS-VS

0.55ct Yellow Color-Change Diaspore, Square, VVS-VS

4.6 x 4.4 mm

$ 22.72

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1.40ctw Red Rhodolite Garnet, Square, VS

1.40ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.26

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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 -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 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 -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate
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