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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

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.32ct Yellow Citrine, Baguette, VVS-VS

2.32ct Yellow Citrine, Baguette, VVS-VS

11.7 x 6.2 mm

$ 17.79

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0.63ct Orange Sphalerite, Oval, SI-I1

0.63ct Orange Sphalerite, Oval, SI-I1

5.1 x 4.2 mm

$ 31.37

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26.55ct Black Tourmaline, Emerald Cut, Opaque
Tourmaline Product Video (669752)

26.55ct Black Tourmaline, Emerald Cut, Opaque

25 x 14.2 mm

$ 132.22

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112.08ct Violet Amethyst, Square, Opaque

112.08ct Violet Amethyst, Square, Opaque

28.3 x 27.7 mm

$ 93.03

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0.91ct Orange Hessonite Garnet, Square, VS

0.91ct Orange Hessonite Garnet, Square, VS

5.5 x 5.4 mm

$ 15.26

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21.29ct Gray Jadeite, Oval, Translucent

21.29ct Gray Jadeite, Oval, Translucent

18.8 x 17.8 mm

$ 25.43

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9.32ct Pink Rose Quartz, Round, Transparent

9.32ct Pink Rose Quartz, Round, Transparent

14 mm (calibrated)

$ 51.05

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2.61ctw Green Peridot, Round, VVS-VS

2.61ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 42.89

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17.31ct White Amazonite, Fancy, Translucent

17.31ct White Amazonite, Fancy, Translucent

33.5 x 8.1 mm

$ 9.50

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0.42ct Green Kornerupine, Oval, VS

0.42ct Green Kornerupine, Oval, VS

5.3 x 3.9 mm

$ 35.97

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1.29ct Yellow Beryl, Oval, VVS-VS

1.29ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 25.70

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1.02ct Orange Hessonite Garnet, Oval, VS

1.02ct Orange Hessonite Garnet, Oval, VS

7.2 x 5.8 mm

$ 19.31

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22.99ct Black Obsidian, Oval, Opaque

22.99ct Black Obsidian, Oval, Opaque

28.6 x 19.4 mm

$ 17.17

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1.05ct Brown Sillimanite Cat'S Eye, Oval, Transparent

1.05ct Brown Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 4.9 mm

$ 3.14

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2.52ctw Red Pyrope Garnet, Marquise, VVS-VS

2.52ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.1 mm

$ 20.08

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2.81ct Purple Kunzite, Emerald Cut, VVS-VS

2.81ct Purple Kunzite, Emerald Cut, VVS-VS

9 x 6 mm (calibrated)

$ 69.97

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2.34ctw Pink Strawberry Quartz, Oval, Translucent

2.34ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 30.77

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23.33ct Brown Moonstone, Oval, Opaque

23.33ct Brown Moonstone, Oval, Opaque

20.3 x 16 mm

$ 51.13

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28.27ct Multicolor Obsidian, Oval, Opaque

28.27ct Multicolor Obsidian, Oval, Opaque

30 x 22 mm (calibrated)

$ 23.85

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1.20ct Yellow Citrine, Cushion, VS

1.20ct Yellow Citrine, Cushion, VS

8 x 6 mm (calibrated)

$ 8.96

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1.61ct Pink Morganite, Oval, VS

1.61ct Pink Morganite, Oval, VS

9 x 7 mm (calibrated)

$ 123.47

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0.04ct Black Diamond, Square, Opaque

0.04ct Black Diamond, Square, Opaque

1.8 x 1.8 mm

$ 19.92

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2.89ct Black Cat'S Eye Scapolite, Round, Translucent

2.89ct Black Cat'S Eye Scapolite, Round, Translucent

9 mm (calibrated)

$ 15.84

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6.76ct Brown Smoky Quartz, Round, VVS-VS

6.76ct Brown Smoky Quartz, Round, VVS-VS

13 mm (calibrated)

$ 22.22

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 -> 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

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

Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
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Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

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
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