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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
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Yellow Untreated Gemstones
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2.94ct Green Prehnite, Oval, Transparent

9.2 x 7.7 mm

$ 16.10

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3.69ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 23.16

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12.13ct Multicolor Jasper, Oval, Opaque

20 x 15 mm (calibrated)

$ 19.94

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4.32ct Brown Smoky Quartz, Round, VVS-VS

10.5 mm

$ 7.10

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0.71ct Yellow Color-Change Diaspore, Emerald Cut, VVS

7.4 x 4.2 mm

$ 37.48

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11.17ctw Violet Amethyst, Oval, Transparent

12 x 10 mm (calibrated)

$ 61.20

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2.53ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 5.04

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2.75ctw Orange Sunstone, Round, Translucent

7 mm (calibrated)

$ 38.35

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1.49ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 18.55

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98.04ct Brown Tiger'S Eye, Square, Opaque

27.1 x 26.6 mm

$ 56.96

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4.15ct Red Rhodolite Garnet, Oval, VS

9.5 x 8 mm

$ 172.23

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3.30ct Brown Tiger'S Eye, Oval, Opaque

10.5 x 8.1 mm

$ 3.29

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4.90ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 26.84

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0.19ctw White Diamond, Round, VVS-VS

2.9 mm (calibrated)

$ 339.67

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3.19ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 26.48

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17.78ct Violet Amethyst, Pear Shape, VVS

21.3 x 16 mm

$ 123.96

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5.63ct Turquoise Hemimorphite Druzy, Fancy, Translucent

14.8 x 9.1 mm

$ 92.53

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12.64ct Pink Rose Quartz, Emerald Cut, Transparent

15 x 15 mm (calibrated)

$ 69.24

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11.86ct Multicolor Coral, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 37.03

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3.66ctw Brown Smoky Quartz, Round, VVS-VS

8.5 mm (calibrated)

$ 6.02

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3.92ctw Multicolor Andalusite, Round, VS

3.7 mm

$ 143.48

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0.66ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 16.43

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2.74ctw Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 46.97

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2.62ct Red Almandine Garnet, Pear Shape, VVS

12 x 8 mm (calibrated)

$ 21.75

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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

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 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

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate
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