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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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2.68ct Yellow Citrine, Oval, VVS

2.68ct Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 14.68

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2.38ct Yellow Apatite, Baguette, VS-SI

2.38ct Yellow Apatite, Baguette, VS-SI

10.9 x 6.5 mm

$ 108.35

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10.04ct Green Bloodstone, Pear Shape, Opaque

10.04ct Green Bloodstone, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 38.50

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6.15ct Multicolor Amethyst Geode Slice, Fancy, Transparent

6.15ct Multicolor Amethyst Geode Slice, Fancy, Transparent

15.9 x 10.8 mm

$ 6.56

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34.86ct Multicolor Rhodochrosite, Oval, Translucent

34.86ct Multicolor Rhodochrosite, Oval, Translucent

27 x 20 mm (calibrated)

$ 59.58

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1.55ctw White Rainbow Moonstone, Oval, Transparent

1.55ctw White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 26.24

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2.76ct Yellow Sphene, Oval, Transparent

2.76ct Yellow Sphene, Oval, Transparent

9.5 x 7.9 mm

$ 13.74

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0.72ct Blue Kyanite, Round, SI

0.72ct Blue Kyanite, Round, SI

5 mm (calibrated)

$ 17.93

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7.53ct Multicolor Fire Agate, Fancy, Opaque

7.53ct Multicolor Fire Agate, Fancy, Opaque

12.8 x 11.6 mm

$ 59.06

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0.72ctw Yellow Citrine, Oval, VS

0.72ctw Yellow Citrine, Oval, VS

6 x 4 mm (calibrated)

$ 4.73

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1.73ct Green Tourmaline, Emerald Cut, VS

1.73ct Green Tourmaline, Emerald Cut, VS

16.2 x 3.6 mm

$ 37.91

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5.32ct White Rainbow Moonstone, Square, Transparent

5.32ct White Rainbow Moonstone, Square, Transparent

12.3 x 11.4 mm

$ 95.38

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1.48ctw Red Rhodolite Garnet, Square, VS

1.48ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.96

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9.03ct Pink Kunzite, Fancy, VVS-VS
Kunzite Product Video (710338)

9.03ct Pink Kunzite, Fancy, VVS-VS

15.5 x 10.7 mm

$ 238.34

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9.48ct Multicolor Agate, Oval, Opaque

9.48ct Multicolor Agate, Oval, Opaque

13.2 x 12.1 mm

$ 16.05

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1.73ct Pink Strawberry Quartz, Oval, Translucent

1.73ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.65

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17.46ct Green Uvarovite Garnet Drusy, Fancy, Opaque

17.46ct Green Uvarovite Garnet Drusy, Fancy, Opaque

18.2 x 18 mm

$ 56.81

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5.66ct Green Prehnite, Pear Shape, Transparent

5.66ct Green Prehnite, Pear Shape, Transparent

14 x 9 mm (calibrated)

$ 140.93

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26.73ct Green Aventurine, Oval, Translucent

26.73ct Green Aventurine, Oval, Translucent

26.6 x 21.3 mm

$ 26.63

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0.44ctw Blue Kyanite, Round, VS-SI

0.44ctw Blue Kyanite, Round, VS-SI

3.5 mm (calibrated)

$ 7.89

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2.69ct Purple Rhodolite Garnet, Oval, VVS

2.69ct Purple Rhodolite Garnet, Oval, VVS

9.2 x 7.8 mm

$ 72.12

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1.27ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

1.27ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

7.3 x 4.7 mm

$ 66.37

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1.39ct Yellow Citrine, Trillion, VS

1.39ct Yellow Citrine, Trillion, VS

8 x 8 mm (calibrated)

$ 8.61

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0.67ct Yellow Color-Change Diaspore, Cushion, VVS

0.67ct Yellow Color-Change Diaspore, Cushion, VVS

5.2 x 5.1 mm

$ 35.37

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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 -> 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

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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