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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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27.92ct Black Tourmaline, Emerald Cut, Opaque

27.92ct Black Tourmaline, Emerald Cut, Opaque

45.7 x 8.9 mm

$ 139.04

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1.14ct Orange Hessonite Garnet, Cushion, VVS-VS

1.14ct Orange Hessonite Garnet, Cushion, VVS-VS

7 x 5 mm (calibrated)

$ 22.71

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1.32ct Multicolor Opal, Oval, Translucent
Opal Product Video (576116)

1.32ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 54.96

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4.58ct Yellow Apatite, Baguette, VS

4.58ct Yellow Apatite, Baguette, VS

13 x 8.4 mm

$ 125.25

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0.69ct Orange Zircon, Oval, VVS

0.69ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 10.31

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1.67ct Yellow Citrine, Flower Cut, Transparent

1.67ct Yellow Citrine, Flower Cut, Transparent

8 x 8 mm (calibrated)

$ 12.81

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0.76ct Green Peridot, Oval, VVS

0.76ct Green Peridot, Oval, VVS

7 x 5 mm (calibrated)

$ 10.60

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6.52ctw Pink Strawberry Quartz, Oval, Translucent

6.52ctw Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 50.00

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33.41ct Green Idocrase, Oval, Opaque

33.41ct Green Idocrase, Oval, Opaque

30 x 22 mm (calibrated)

$ 16.64

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0.72ct Green Tourmaline, Baguette, VVS

0.72ct Green Tourmaline, Baguette, VVS

5.9 x 3.9 mm

$ 25.10

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56.97ct Violet Amethyst, Cushion, VVS
Amethyst Product Video (734692)

56.97ct Violet Amethyst, Cushion, VVS

27 x 20 mm (calibrated)

$ 453.94

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3.19ct Green Tourmaline, Cushion, Transparent

3.19ct Green Tourmaline, Cushion, Transparent

10.7 x 7.9 mm

$ 43.69

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1.22ct Red Strawberry Quartz, Oval, Transparent

1.22ct Red Strawberry Quartz, Oval, Transparent

8.5 x 6.7 mm

$ 7.85

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0.83ct Green Peridot, Oval, VS

0.83ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.57

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2.51ct Bi-Color Ametrine, Emerald Cut, VS

2.51ct Bi-Color Ametrine, Emerald Cut, VS

9 x 7 mm (calibrated)

$ 26.34

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4.71ctw Red Pyrope Garnet, Square, VS

4.71ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 36.12

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5.37ct Green Malachite, Baguette, Opaque

5.37ct Green Malachite, Baguette, Opaque

10 x 8 mm (calibrated)

$ 5.88

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1.38ct Yellow Citrine, Trillion, VS

1.38ct Yellow Citrine, Trillion, VS

8 x 8 mm (calibrated)

$ 10.59

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1.51ctw Red Pyrope Garnet, Square, VS

1.51ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.59

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9.97ct Brown Smoky Quartz, Round, VVS

9.97ct Brown Smoky Quartz, Round, VVS

15 mm (calibrated)

$ 40.20

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17.61ct Pink Rose Quartz, Oval, Transparent

17.61ct Pink Rose Quartz, Oval, Transparent

18 x 13 mm (calibrated)

$ 23.54

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2.00ctw Yellow Beryl, Oval, VVS-VS

2.00ctw Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 39.84

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0.90ctw Red Pyrope Garnet, Square, VVS-VS

0.90ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 6.91

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7.05ct Multicolor Quartz With Marcasite, Oval, Transparent

7.05ct Multicolor Quartz With Marcasite, Oval, Transparent

13.6 x 11.3 mm

$ 46.35

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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

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
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Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 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
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