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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: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Brown Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Violet Untreated Gemstones
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Yellow Untreated Gemstones
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2.18ct Yellow Citrine, Square, VVS-VS

2.18ct Yellow Citrine, Square, VVS-VS

8 x 8 mm (calibrated)

$ 12.75

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0.84ct Green Tourmaline, Round, Transparent

0.84ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 16.73

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6.19ct White Topaz, Cushion, VS

6.19ct White Topaz, Cushion, VS

12 x 10 mm (calibrated)

$ 41.10

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1.68ctw Green Demantoid Garnet, Oval, VVS-VS
Demantoid Garnet Product Video (467948)

1.68ctw Green Demantoid Garnet, Oval, VVS-VS

4.5 x 3.4 mm

$ 147.25

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25.64ct Brown Jasper, Fancy, Opaque

25.64ct Brown Jasper, Fancy, Opaque

37.3 x 9.3 mm

$ 5.11

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6.33ct Blue Chalcedony, Cushion, Translucent

6.33ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 23.65

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4.83ctw White Topaz, Cushion, VVS-VS

4.83ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 26.46

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2.70ct Yellow Citrine, Oval, VS

2.70ct Yellow Citrine, Oval, VS

12 x 8 mm (calibrated)

$ 20.71

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23.62ctw Multicolor Pietersite, Oval, Opaque

23.62ctw Multicolor Pietersite, Oval, Opaque

20 x 15 mm (calibrated)

$ 77.64

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7.21ct Multicolor Ruby-Zoisite, Marquise, Opaque
Ruby-Zoisite Product Video (291451)

7.21ct Multicolor Ruby-Zoisite, Marquise, Opaque

22.4 x 8 mm

$ 21.72

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1.82ct Orange Hessonite Garnet, Square, VS

1.82ct Orange Hessonite Garnet, Square, VS

6.9 x 5.9 mm

$ 31.76

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21.72ct Multicolor Jasper, Oval, Opaque

21.72ct Multicolor Jasper, Oval, Opaque

29.3 x 20.4 mm

$ 35.70

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2.78ct Multicolor Labradorite, Pear Shape, Translucent

2.78ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 6.14

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0.80ct Blue Kyanite, Oval, SI

0.80ct Blue Kyanite, Oval, SI

6.4 x 4.4 mm

$ 17.53

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0.76ct Green Peridot, Oval, VVS-VS

0.76ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 5.30

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45.70ct Multicolor Jasper, Oval, Opaque

45.70ct Multicolor Jasper, Oval, Opaque

35.3 x 26 mm

$ 37.56

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1.46ct Multicolor Opal, Oval, Translucent

1.46ct Multicolor Opal, Oval, Translucent

10 x 8 mm (calibrated)

$ 56.56

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3.72ct Violet Amethyst, Pear Shape, VVS-VS

3.72ct Violet Amethyst, Pear Shape, VVS-VS

13 x 9 mm (calibrated)

$ 28.53

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1.19ctw Red Pyrope Garnet, Heart, VS

1.19ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 31.29

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2.01ct Orange Hessonite Garnet, Cushion, VS-SI

2.01ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 29.89

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3.81ctw Yellow Sillimanite, Oval, VVS-VS

3.81ctw Yellow Sillimanite, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 94.21

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3.61ctw Yellow Sphene, Oval, Transparent

3.61ctw Yellow Sphene, Oval, Transparent

7.7 x 6.5 mm

$ 17.98

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34.04ct Multicolor Obsidian, Oval, Opaque

34.04ct Multicolor Obsidian, Oval, Opaque

34.6 x 24.3 mm

$ 26.10

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30.80ct Violet Amethyst, Pear Shape, VVS

30.80ct Violet Amethyst, Pear Shape, VVS

23.5 x 17.5 mm

$ 204.51

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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 -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
Source: Bizrate

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 -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate
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