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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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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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12.70ct Multicolor Agate, Sphere / Ball, Opaque
Agate Product Video (700577)

12.70ct Multicolor Agate, Sphere / Ball, Opaque

12 mm (calibrated)

$ 10.12

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26.46ct Multicolor Jasper, Baguette, Opaque

26.46ct Multicolor Jasper, Baguette, Opaque

27.6 x 16.3 mm

$ 16.23

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1.73ct Purple Rhodolite Garnet, Oval, VVS-VS

1.73ct Purple Rhodolite Garnet, Oval, VVS-VS

7.5 x 6.1 mm

$ 60.31

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1.87ct Blue Kyanite, Oval, SI

1.87ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 40.98

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0.19ct Black Diamond, Square, Opaque

0.19ct Black Diamond, Square, Opaque

2.8 x 2.7 mm

$ 94.62

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0.44ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.44ct Green Cat'S Eye Alexandrite, Oval, Opaque

5.2 x 3.7 mm

$ 73.04

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1.76ct Orange Hessonite Garnet, Oval, VS-SI

1.76ct Orange Hessonite Garnet, Oval, VS-SI

8.1 x 6.7 mm

$ 26.29

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0.72ct Green Tourmaline, Emerald Cut, VS

0.72ct Green Tourmaline, Emerald Cut, VS

7.7 x 4.1 mm

$ 17.93

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2.40ct Orange Zircon, Round, VVS

2.40ct Orange Zircon, Round, VVS

7.5 mm (calibrated)

$ 65.74

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17.61ctw Brown Tiger'S Eye, Cushion, Opaque

17.61ctw Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 19.29

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4.09ct Yellow Citrine, Emerald Cut, VVS

4.09ct Yellow Citrine, Emerald Cut, VVS

11 x 11 mm (calibrated)

$ 22.41

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34.29ct Multicolor Jasper, Oval, Opaque

34.29ct Multicolor Jasper, Oval, Opaque

27.3 x 18.4 mm

$ 19.47

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24.42ct Yellow Obsidian, Fancy, Opaque

24.42ct Yellow Obsidian, Fancy, Opaque

27.4 x 18.5 mm

$ 24.32

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1.57ct Violet Amethyst, Marquise, Transparent

1.57ct Violet Amethyst, Marquise, Transparent

12 x 6 mm (calibrated)

$ 10.95

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5.07ct Brown Smoky Quartz, Emerald Cut, VS

5.07ct Brown Smoky Quartz, Emerald Cut, VS

10.5 x 10.4 mm

$ 13.89

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2.67ctw Yellow Citrine, Emerald Cut, VS

2.67ctw Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 18.54

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0.64ct Yellow Beryl, Oval, VS

0.64ct Yellow Beryl, Oval, VS

7 x 5 mm (calibrated)

$ 12.75

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3.06ct Yellow Citrine, Oval, VVS-VS

3.06ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 21.33

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38.31ctw Multicolor Agate, Round, Opaque

38.31ctw Multicolor Agate, Round, Opaque

16 mm (calibrated)

$ 38.16

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2.43ct Violet Amethyst, Fancy, VS-SI

2.43ct Violet Amethyst, Fancy, VS-SI

9.1 x 8.5 mm

$ 19.36

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1.95ct Yellow Zircon, Round, VS
Zircon Product Video (442216)

1.95ct Yellow Zircon, Round, VS

7 mm (calibrated)

$ 42.73

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0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.2 mm (calibrated)

$ 17.11

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0.72ct Yellow Sphalerite, Oval, SI-I1

0.72ct Yellow Sphalerite, Oval, SI-I1

6.1 x 4.2 mm

$ 35.86

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2.04ct Orange Moonstone, Trillion, Translucent

2.04ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 4.07

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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

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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Overall Rating -> 10 star ratings

The stones are very nice.

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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
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Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

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
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