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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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9.80ctw Multicolor Pietersite, Oval, Opaque

9.80ctw Multicolor Pietersite, Oval, Opaque

14 x 10 mm (calibrated)

$ 32.21

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7.09ctw Yellow Citrine, Pear Shape, VVS-VS

7.09ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 44.51

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0.47ct White Rainbow Moonstone, Baguette, Transparent

0.47ct White Rainbow Moonstone, Baguette, Transparent

5.8 x 3.7 mm

$ 13.65

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0.77ct Pink Tourmaline, Round, Transparent

0.77ct Pink Tourmaline, Round, Transparent

5.7 mm

$ 12.76

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1.97ctw Green Tsavorite Garnet, Baguette, VS

1.97ctw Green Tsavorite Garnet, Baguette, VS

2.9 x 1.9 mm

$ 118.71

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0.98ct Yellow Citrine, Trillion, VS

0.98ct Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 7.52

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0.69ctw Yellow Citrine, Oval, VVS-VS

0.69ctw Yellow Citrine, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 4.81

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36.15ct Turquoise Chrysocolla, Oval, Opaque
Chrysocolla Product Video (646872)

36.15ct Turquoise Chrysocolla, Oval, Opaque

32.9 x 21.7 mm

$ 57.77

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3.12ct Violet Amethyst, Trillion, VS

3.12ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.75

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1.63ct Green Tourmaline, Emerald Cut, VVS

1.63ct Green Tourmaline, Emerald Cut, VVS

13.5 x 3.8 mm

$ 44.65

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3.36ct Red Almandine Garnet, Oval, VVS-VS

3.36ct Red Almandine Garnet, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 97.61

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18.25ctw Multicolor Labradorite, Oval, Translucent

18.25ctw Multicolor Labradorite, Oval, Translucent

20 x 15 mm (calibrated)

$ 39.99

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19.06ctw Multicolor Labradorite, Pear Shape, Translucent

19.06ctw Multicolor Labradorite, Pear Shape, Translucent

22 x 16.1 mm

$ 42.14

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8.86ct Green Malachite, Oval, Opaque

8.86ct Green Malachite, Oval, Opaque

14 x 10 mm (calibrated)

$ 8.82

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0.86ct Yellow Beryl, Trillion, VVS

0.86ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 17.13

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27.10ct Multicolor Jasper, Pear Shape, Opaque

27.10ct Multicolor Jasper, Pear Shape, Opaque

30 x 22 mm (calibrated)

$ 22.40

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34.78ct Red Pyrope Garnet, Oval, VVS

34.78ct Red Pyrope Garnet, Oval, VVS

22.1 x 17 mm

$ 1,443.37

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0.75ct Green Peridot, Square, Transparent

0.75ct Green Peridot, Square, Transparent

5 x 5 mm (calibrated)

$ 6.72

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0.40ct Black Diamond, Square, Opaque

0.40ct Black Diamond, Square, Opaque

3.7 x 3.5 mm

$ 199.20

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5.71ct Violet Amethyst, Fancy, Transparent

5.71ct Violet Amethyst, Fancy, Transparent

12.7 x 12.2 mm

$ 34.12

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3.89ctw Yellow Sphene, Oval, Transparent

3.89ctw Yellow Sphene, Oval, Transparent

7.1 x 6.3 mm

$ 19.37

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4.40ctw White Topaz, Square, VS

4.40ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 33.75

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1.20ct Brown Color-Change Garnet, Round, VVS-VS

1.20ct Brown Color-Change Garnet, Round, VVS-VS

6 mm (calibrated)

$ 95.87

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1.12ct Purple Spinel, Cushion, VS

1.12ct Purple Spinel, Cushion, VS

6.7 x 5.4 mm

$ 67.54

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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 -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
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Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
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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
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Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
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Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate
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