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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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Yellow Untreated Gemstones
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5.71ct Multicolor Agate, Oval, Opaque

5.71ct Multicolor Agate, Oval, Opaque

15.6 x 10.9 mm

$ 4.55

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1.54ct Yellow Citrine, Round, VVS-VS

1.54ct Yellow Citrine, Round, VVS-VS

7.5 mm (calibrated)

$ 12.27

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0.91ct Green Peridot, Pear Shape, VS

0.91ct Green Peridot, Pear Shape, VS

7 x 5 mm (calibrated)

$ 6.34

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2.89ct Violet Amethyst, Trillion, VS

2.89ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 15.84

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6.20ct Green Opal, Oval, Opaque

6.20ct Green Opal, Oval, Opaque

14.7 x 11.6 mm

$ 13.28

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0.80ct Pink Morganite, Pear Shape, VVS-VS

0.80ct Pink Morganite, Pear Shape, VVS-VS

9.9 x 5 mm

$ 48.21

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4.32ct Orange Sunstone, Oval, Translucent

4.32ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 25.79

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0.05ct Black Diamond, Round, Opaque

0.05ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 14.53

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6.13ct Brown Tiger'S Eye, Baguette, Opaque

6.13ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 6.11

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0.93ct Yellow Citrine, Trillion, VVS-VS

0.93ct Yellow Citrine, Trillion, VVS-VS

7 x 7 mm (calibrated)

$ 7.41

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2.52ct Multicolor Labradorite, Marquise, Translucent

2.52ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 5.57

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15.33ct Yellow Rutile Quartz, Pear Shape, Transparent
Rutile Quartz Product Video (334056)

15.33ct Yellow Rutile Quartz, Pear Shape, Transparent

19.1 x 15.8 mm

$ 57.10

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0.86ct Green Peridot, Oval, VVS-VS

0.86ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.71

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2.33ct Orange Hessonite Garnet, Oval, VS-SI

2.33ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 45.95

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2.51ct Green Sphene, Oval, Transparent

2.51ct Green Sphene, Oval, Transparent

7.9 x 6.8 mm

$ 13.75

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1.68ct Orange Hessonite Garnet, Oval, VS-SI

1.68ct Orange Hessonite Garnet, Oval, VS-SI

7.7 x 6.6 mm

$ 27.61

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1.16ct White Sillimanite Cat'S Eye, Oval, Transparent

1.16ct White Sillimanite Cat'S Eye, Oval, Transparent

7.6 x 5.3 mm

$ 3.49

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1.71ctw Violet Amethyst, Cushion, VVS-VS

1.71ctw Violet Amethyst, Cushion, VVS-VS

7 x 5 mm (calibrated)

$ 11.92

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9.70ctw Yellow Citrine, Oval, VVS-VS

9.70ctw Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 74.39

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3.58ct Yellow Citrine, Oval, VVS-VS

3.58ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 27.46

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1.61ct Orange Hessonite Garnet, Oval, VS-SI

1.61ct Orange Hessonite Garnet, Oval, VS-SI

7.9 x 6.6 mm

$ 26.46

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1.39ctw Multicolor Opal, Oval, Translucent
Opal Product Video (548525)

1.39ctw Multicolor Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 346.11

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0.47ct Yellow Citrine, Marquise, VVS-VS
Citrine Product Video (508370)

0.47ct Yellow Citrine, Marquise, VVS-VS

8.1 x 4.2 mm

$ 2.56

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23.14ctw Multicolor Fossil Coral, Oval, Translucent

23.14ctw Multicolor Fossil Coral, Oval, Translucent

19.8 x 12.6 mm

$ 27.48

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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

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 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

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 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 -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate
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