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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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11.50ct Multicolor Labradorite, Oval, Translucent

11.50ct Multicolor Labradorite, Oval, Translucent

18 x 13 mm (calibrated)

$ 25.20

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4.23ctw Violet Amethyst, Oval, VVS-VS

4.23ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 23.17

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2.57ctw Red Pyrope Garnet, Emerald Cut, VVS-VS

2.57ctw Red Pyrope Garnet, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 17.92

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2.97ct Pink Strawberry Quartz, Oval, Transparent

2.97ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 22.27

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5.65ct Orange Sunstone, Oval, Translucent

5.65ct Orange Sunstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 32.93

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21.86ct Turquoise Amazonite, Cushion, Translucent

21.86ct Turquoise Amazonite, Cushion, Translucent

19.4 x 14 mm

$ 18.68

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70.78ct Violet Amethyst, Cushion, VS
Amethyst Product Video (638420)

70.78ct Violet Amethyst, Cushion, VS

25.8 x 25.6 mm

$ 493.48

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1.65ct Purple Rhodolite Garnet, Oval, VVS-VS

1.65ct Purple Rhodolite Garnet, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 57.52

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1.46ct Orange Hessonite Garnet, Oval, VVS-VS

1.46ct Orange Hessonite Garnet, Oval, VVS-VS

7.6 x 6.2 mm

$ 29.08

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1.34ct Pink Tourmaline, Emerald Cut, VVS-VS

1.34ct Pink Tourmaline, Emerald Cut, VVS-VS

7.1 x 5.5 mm

$ 88.09

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3.30ctw Multicolor Andalusite, Round, VS

3.30ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 145.08

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4.49ctw Orange Sunstone, Oval, Translucent

4.49ctw Orange Sunstone, Oval, Translucent

7.1 x 5.3 mm

$ 34.43

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3.65ctw Brown Smoky Quartz, Round, VS

3.65ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 15.99

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63.50ct Pink Star Rose Quartz, Oval, Translucent

63.50ct Pink Star Rose Quartz, Oval, Translucent

25.3 x 20.2 mm

$ 139.14

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1.89ct Green Peridot, Cushion, VS

1.89ct Green Peridot, Cushion, VS

8.6 x 6.4 mm

$ 67.66

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25.13ct Multicolor Jasper, Square, Opaque

25.13ct Multicolor Jasper, Square, Opaque

22.2 x 21.9 mm

$ 27.53

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0.84ct Green Tourmaline, Emerald Cut, VS

0.84ct Green Tourmaline, Emerald Cut, VS

7.7 x 3.4 mm

$ 41.83

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4.24ct Yellow Citrine, Cushion, VVS-VS

4.24ct Yellow Citrine, Cushion, VVS-VS

12.9 x 7.3 mm

$ 32.52

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21.21ctw Multicolor Fossil Coral, Oval, Translucent

21.21ctw Multicolor Fossil Coral, Oval, Translucent

20.8 x 12.1 mm

$ 26.49

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19.79ct Gray Hematite, Baguette, Opaque

19.79ct Gray Hematite, Baguette, Opaque

16.7 x 10.6 mm

$ 19.29

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3.09ctw Orange Zircon, Emerald Cut, VVS-VS

3.09ctw Orange Zircon, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 50.79

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16.21ctw Multicolor Fossil Coral, Pear Shape, Opaque

16.21ctw Multicolor Fossil Coral, Pear Shape, Opaque

19.2 x 11.1 mm

$ 35.17

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12.52ct Multicolor Turquoise, Pear Shape, Opaque

12.52ct Multicolor Turquoise, Pear Shape, Opaque

21.7 x 14.7 mm

$ 20.78

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1.72ct Yellow Citrine, Emerald Cut, VVS-VS

1.72ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 13.70

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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

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate

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
→ View All GemSelect Reviews on Bizrate
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