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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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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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5.15ct Violet Amethyst, Marquise, VVS

17.6 x 9 mm

$ 39.50

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27.44ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

28.4 x 22.4 mm

$ 27.33

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0.58ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 12.04

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13.22ct Multicolor Labradorite, Round, Translucent

14 mm (calibrated)

$ 28.44

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0.05ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 14.53

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5.03ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 16.53

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7.36ct Pink Rose Quartz, Emerald Cut, Transparent

11.7 x 11.5 mm

$ 40.32

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39.35ct Multicolor Jasper, Oval, Opaque

31.9 x 22.1 mm

$ 43.12

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5.20ct Yellow Citrine, Oval, VVS

14.2 x 9.6 mm

$ 34.18

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1.45ctw Red Pyrope Garnet, Square, VVS-VS

4.9 x 4.8 mm

$ 11.12

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0.79ct Orange Sphalerite, Oval, VS-SI

5.7 x 4.6 mm

$ 39.34

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4.04ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 24.25

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5.23ct Multicolor Pietersite, Marquise, Opaque

19.4 x 7.4 mm

$ 15.63

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4.42ct Multicolor Fire Agate, Fancy, Translucent

11 x 10.3 mm

$ 38.01

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4.36ctw Red Malaya Garnet, Cushion, VVS-VS

7.2 x 5.2 mm

$ 167.19

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6.16ct Brown Rutile Topaz, Pear Shape, Transparent

11.5 x 11.8 mm

$ 127.82

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9.13ctw Multicolor Labradorite, Baguette, Translucent

10 x 8 mm (calibrated)

$ 13.74

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3.67ct Multicolor Pietersite, Marquise, Opaque

21.8 x 6.7 mm

$ 8.67

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0.57ct Yellow Color-Change Diaspore, Round, VS

5 mm (calibrated)

$ 30.09

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1.68ct Yellow Rutile Topaz, Pear Shape, Transparent

8.9 x 6.4 mm

$ 34.86

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37.78ct Multicolor Jasper, Pear Shape, Opaque

32.2 x 20 mm

$ 23.59

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2.31ct Violet Amethyst, Emerald Cut, VS

9 x 7 mm (calibrated)

$ 13.89

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66.65ct Multicolor Jasper, Cushion, Opaque

41.3 x 30.6 mm

$ 45.27

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3.60ctw Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 71.71

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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

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

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

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber 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
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Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
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Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
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Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate
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