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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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5.15ctw Pink Strawberry Quartz, Oval, Transparent

5.15ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 38.26

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7.05ctw Pink Morganite, Round, Translucent

7.05ctw Pink Morganite, Round, Translucent

10 mm (calibrated)

$ 77.24

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0.21ct Blue Iolite, Emerald Cut, VS

0.21ct Blue Iolite, Emerald Cut, VS

5 x 3 mm (calibrated)

$ 8.37

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24.60ct Brown Moonstone, Oval, Translucent

24.60ct Brown Moonstone, Oval, Translucent

20 x 15 mm (calibrated)

$ 49.00

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5.46ct Blue Larimar, Oval, Opaque

5.46ct Blue Larimar, Oval, Opaque

12 x 10 mm (calibrated)

$ 64.73

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3.08ct Brown Smoky Quartz, Oval, VS

3.08ct Brown Smoky Quartz, Oval, VS

11.5 x 9 mm

$ 13.50

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1.56ct Green Tourmaline, Oval, VVS-VS

1.56ct Green Tourmaline, Oval, VVS-VS

7.5 x 6.4 mm

$ 181.27

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13.08ct Blue Lazulite, Cushion, Opaque

13.08ct Blue Lazulite, Cushion, Opaque

20.6 x 15.9 mm

$ 12.81

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2.78ctw Green Tsavorite Garnet, Pear Shape, VS
Tsavorite Garnet Product Video (481912)

2.78ctw Green Tsavorite Garnet, Pear Shape, VS

4 x 3 mm (calibrated)

$ 146.59

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0.88ct Green Peridot, Oval, VVS-VS

0.88ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 12.27

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1.22ctw Orange Fire Opal, Oval, Translucent

1.22ctw Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 33.42

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2.60ctw White Rainbow Moonstone, Square, Transparent

2.60ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 41.07

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2.09ct Green Peridot, Cushion, VS

2.09ct Green Peridot, Cushion, VS

7.7 x 6.5 mm

$ 81.97

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16.43ctw Multicolor Fossil Coral, Trillion, Opaque

16.43ctw Multicolor Fossil Coral, Trillion, Opaque

21.4 x 13 mm

$ 17.99

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15.54ct Pink Rose Quartz, Flower Cut, Transparent

15.54ct Pink Rose Quartz, Flower Cut, Transparent

19.4 x 19.2 mm

$ 34.05

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10.14ct Brown Smoky Quartz, Emerald Cut, VS

10.14ct Brown Smoky Quartz, Emerald Cut, VS

13 x 13 mm (calibrated)

$ 16.67

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7.06ctw Orange Sunstone, Round, Translucent

7.06ctw Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 41.77

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1.29ct Green Tourmaline, Emerald Cut, VVS

1.29ct Green Tourmaline, Emerald Cut, VVS

9.2 x 4.1 mm

$ 64.24

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7.67ct Multicolor Agate, Oval, Opaque

7.67ct Multicolor Agate, Oval, Opaque

12.5 x 10.5 mm

$ 7.64

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0.65ct Pink Spinel, Cushion, VVS-VS

0.65ct Pink Spinel, Cushion, VVS-VS

5.3 x 4.6 mm

$ 45.32

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4.70ct Yellow Citrine, Briolette, VVS-VS

4.70ct Yellow Citrine, Briolette, VVS-VS

14.5 x 7.4 mm

$ 26.31

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10.44ct Brown Tiger'S Eye, Oval, Opaque

10.44ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 10.40

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1.16ct Yellow Beryl, Round, VS

1.16ct Yellow Beryl, Round, VS

7 mm (calibrated)

$ 25.41

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4.76ct Yellow Citrine, Oval, VVS-VS

4.76ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 31.29

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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, hope gem quality is good and genuine

Posted By Varun 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

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 -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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