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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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0.84ct Pink Morganite, Pear Shape, VVS

0.84ct Pink Morganite, Pear Shape, VVS

8.5 x 5.3 mm

$ 50.61

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3.25ct White Moonstone, Oval, Translucent

3.25ct White Moonstone, Oval, Translucent

11.9 x 8.6 mm

$ 35.61

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1.29ct Green Sphene, Oval, Transparent

1.29ct Green Sphene, Oval, Transparent

6 x 6 mm (calibrated)

$ 6.42

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3.21ct Violet Amethyst, Trillion, VS

3.21ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 25.58

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32.69ct White Dendritic Agate, Pear Shape, Opaque

32.69ct White Dendritic Agate, Pear Shape, Opaque

38.6 x 20.3 mm

$ 22.79

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2.26ct Yellow Citrine, Trillion, VS

2.26ct Yellow Citrine, Trillion, VS

9 x 9 mm (calibrated)

$ 12.23

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4.21ctw Red Pyrope Garnet, Marquise, VVS-VS

4.21ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 46.26

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6.21ct Yellow Citrine, Emerald Cut, VVS

6.21ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 47.63

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3.95ctw Red Pyrope Garnet, Square, VS

3.95ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 30.30

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1.74ct Orange Hessonite Garnet, Oval, VVS-VS

1.74ct Orange Hessonite Garnet, Oval, VVS-VS

8.4 x 6.4 mm

$ 26.58

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1.15ct Blue Kyanite, Oval, VS-SI

1.15ct Blue Kyanite, Oval, VS-SI

7 x 5 mm (calibrated)

$ 21.00

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60.51ctw Gray Hematite, Pear Shape, Opaque

60.51ctw Gray Hematite, Pear Shape, Opaque

23.2 x 17.1 mm

$ 49.17

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0.96ct Green Peridot, Oval, VS

0.96ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 6.69

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25.84ct Gray Hematite, Baguette, Opaque

25.84ct Gray Hematite, Baguette, Opaque

18.8 x 13.4 mm

$ 25.20

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1.47ct Purple Sapphire, Cushion, VS
Sapphire Product Video (448538)

1.47ct Purple Sapphire, Cushion, VS

7.1 x 5.6 mm

$ 776.27

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2.02ct Orange Hessonite Garnet, Cushion, SI

2.02ct Orange Hessonite Garnet, Cushion, SI

8 x 6 mm (calibrated)

$ 33.97

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24.33ct Multicolor Matrix Opal, Cushion, Opaque

24.33ct Multicolor Matrix Opal, Cushion, Opaque

27.2 x 16.9 mm

$ 41.19

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26.63ct Gray Hematite, Pear Shape, Opaque

26.63ct Gray Hematite, Pear Shape, Opaque

22.3 x 17.1 mm

$ 25.96

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9.36ct Violet Amethyst, Briolette, VS

9.36ct Violet Amethyst, Briolette, VS

13.6 x 10.1 mm

$ 41.02

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9.51ct Multicolor Rainbow Pyrite, Fancy, Opaque

9.51ct Multicolor Rainbow Pyrite, Fancy, Opaque

16 x 12 mm (calibrated)

$ 28.42

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4.40ct Yellow Citrine, Round, VVS

4.40ct Yellow Citrine, Round, VVS

11 mm (calibrated)

$ 28.93

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32.75ct Multicolor Jasper, Baguette, Opaque

32.75ct Multicolor Jasper, Baguette, Opaque

25.6 x 21.4 mm

$ 53.82

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2.85ct Orange Sunstone, Oval, Translucent

2.85ct Orange Sunstone, Oval, Translucent

10 x 8 mm (calibrated)

$ 21.71

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14.11ct Brown Tiger'S Eye, Pear Shape, Opaque

14.11ct Brown Tiger'S Eye, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 14.05

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

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound 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

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate
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