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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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For Example: 8-9
Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.03ct Blue Cavansite, Fancy, Opaque

2.03ct Blue Cavansite, Fancy, Opaque

8.9 x 8.6 mm

$ 11.79

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0.41ct Blue Kyanite, Round, VS-SI

0.41ct Blue Kyanite, Round, VS-SI

4.2 mm

$ 10.21

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16.08ct Multicolor Jasper, Oval, Opaque

16.08ct Multicolor Jasper, Oval, Opaque

22.2 x 16.2 mm

$ 35.24

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2.24ct Red Tourmaline, Round, Transparent

2.24ct Red Tourmaline, Round, Transparent

8 mm (calibrated)

$ 34.36

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8.46ct Violet Amethyst, Pear Shape, Transparent

8.46ct Violet Amethyst, Pear Shape, Transparent

18.7 x 11.4 mm

$ 50.56

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0.99ct Yellow Beryl, Oval, VS

0.99ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 18.90

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4.09ctw White Topaz, Cushion, VVS-VS

4.09ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 22.41

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3.32ct Green Prehnite, Pear Shape, Transparent/Translucent

3.32ct Green Prehnite, Pear Shape, Transparent/Translucent

11.3 x 7.2 mm

$ 7.27

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4.18ctw Red Pyrope Garnet, Marquise, VVS-VS

4.18ctw Red Pyrope Garnet, Marquise, VVS-VS

11.9 x 6.1 mm

$ 36.64

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1.87ct Pink Tourmaline, Oval, VS-SI

1.87ct Pink Tourmaline, Oval, VS-SI

8.3 x 7.5 mm

$ 279.38

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1.58ct Yellow Citrine, Round, VVS

1.58ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.59

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6.70ct Pink Kunzite, Oval, VVS

6.70ct Pink Kunzite, Oval, VVS

13.4 x 7.9 mm

$ 166.83

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4.83ctw Red Almandine Garnet, Round, Transparent

4.83ctw Red Almandine Garnet, Round, Transparent

3 mm (calibrated)

$ 26.46

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1.08ct Green Tourmaline, Emerald Cut, VS

1.08ct Green Tourmaline, Emerald Cut, VS

15.9 x 3.5 mm

$ 28.39

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3.78ctw White Rainbow Moonstone, Pear Shape, Transparent

3.78ctw White Rainbow Moonstone, Pear Shape, Transparent

5.3 x 5.1 mm

$ 69.02

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50.32ct Multicolor Chrysocolla, Fancy, Opaque
Chrysocolla Product Video (658364)

50.32ct Multicolor Chrysocolla, Fancy, Opaque

35.9 x 25.9 mm

$ 71.42

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1.00ct Orange Hessonite Garnet, Cushion, VS

1.00ct Orange Hessonite Garnet, Cushion, VS

5.8 x 5.7 mm

$ 18.92

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2.48ctw Multicolor Labradorite, Oval, Translucent

2.48ctw Multicolor Labradorite, Oval, Translucent

7 x 6.1 mm

$ 4.12

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2.11ct Orange Moonstone, Square, Translucent

2.11ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.22

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1.17ct Multicolor Black Opal, Oval, Opaque

1.17ct Multicolor Black Opal, Oval, Opaque

9 x 7 mm (calibrated)

$ 30.77

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2.53ctw White Rainbow Moonstone, Square, Transparent

2.53ctw White Rainbow Moonstone, Square, Transparent

3.1 x 2.9 mm

$ 39.96

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2.81ct Yellow Citrine, Cushion, VS

2.81ct Yellow Citrine, Cushion, VS

9.5 x 7.8 mm

$ 21.56

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1.32ct Yellow Citrine, Round, VVS

1.32ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 9.20

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1.56ct Orange Hessonite Garnet, Baguette, VS

1.56ct Orange Hessonite Garnet, Baguette, VS

7.4 x 5.2 mm

$ 31.08

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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

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

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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 -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate
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