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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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1.73ctw Green Demantoid Garnet, Oval, VS

1.73ctw Green Demantoid Garnet, Oval, VS

4.5 x 3.7 mm

$ 189.54

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2.47ct Orange Hessonite Garnet, Oval, VS-SI

2.47ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7.5 mm

$ 48.71

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2.80ct Pink Morganite, Round, Transparent

2.80ct Pink Morganite, Round, Transparent

9 mm (calibrated)

$ 30.37

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0.98ct Black Diamond, Square, Opaque
Diamond Product Video (677843)

0.98ct Black Diamond, Square, Opaque

5 x 5 mm (calibrated)

$ 558.27

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0.65ct Yellow Beryl, Trillion, VVS

0.65ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 12.95

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1.05ct Green Sphene, Oval, Transparent

1.05ct Green Sphene, Oval, Transparent

6.1 x 5.7 mm

$ 5.76

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9.76ct Black Star Diopside, Round, Opaque

9.76ct Black Star Diopside, Round, Opaque

11 mm (calibrated)

$ 48.60

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8.12ct Green Actinolite Cat'S Eye, Oval, Translucent
Actinolite Cat's Eye Product Video (485802)

8.12ct Green Actinolite Cat'S Eye, Oval, Translucent

15.9 x 12.6 mm

$ 56.61

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4.63ctw White Topaz, Cushion, VS

4.63ctw White Topaz, Cushion, VS

4.6 x 4.5 mm

$ 25.36

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2.64ct Yellow Citrine, Oval, VS

2.64ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 18.41

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0.62ct Red Pyrope Garnet, Heart, VVS

0.62ct Red Pyrope Garnet, Heart, VVS

5 x 5 mm (calibrated)

$ 4.94

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1.29ct Yellow Citrine, Emerald Cut, VVS-VS

1.29ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 10.28

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3.70ct Yellow Citrine, Oval, VVS-VS

3.70ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 24.32

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22.17ct Violet Amethyst, Fancy, Transparent

22.17ct Violet Amethyst, Fancy, Transparent

22.5 x 16.9 mm

$ 66.24

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6.24ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

6.24ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

16.8 x 8.3 mm

$ 46.08

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11.91ct Orange Moonstone, Round, Translucent

11.91ct Orange Moonstone, Round, Translucent

14 mm (calibrated)

$ 23.85

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6.61ct Violet Amethyst, Marquise, Transparent

6.61ct Violet Amethyst, Marquise, Transparent

16.2 x 9.8 mm

$ 32.92

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23.93ct Black Feather Pyrite, Oval, Opaque

23.93ct Black Feather Pyrite, Oval, Opaque

25.4 x 19.1 mm

$ 18.67

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1.80ct Orange Hessonite Garnet, Emerald Cut, SI

1.80ct Orange Hessonite Garnet, Emerald Cut, SI

7 x 7 mm (calibrated)

$ 30.27

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31.27ct Multicolor Labradorite, Round, Translucent

31.27ct Multicolor Labradorite, Round, Translucent

25.5 mm

$ 37.06

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1.87ct Purple Rhodolite Garnet, Oval, VS
Rhodolite Garnet Product Video (383658)

1.87ct Purple Rhodolite Garnet, Oval, VS

8 x 6 mm (calibrated)

$ 86.95

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1.30ctw Yellow Citrine, Heart, VVS-VS

1.30ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 9.06

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11.34ct Gray Jadeite, Oval, Translucent

11.34ct Gray Jadeite, Oval, Translucent

17.3 x 12 mm

$ 37.27

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1.33ctw Green Tsavorite Garnet, Baguette, VS

1.33ctw Green Tsavorite Garnet, Baguette, VS

3.1 x 1.9 mm

$ 80.14

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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

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

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 -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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