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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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Yellow Untreated Gemstones
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3.16ctw Yellow Citrine, Pear Shape, VS

8 x 5 mm (calibrated)

$ 20.77

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1.21ctw Orange Zircon, Oval, VVS-VS

5.2 x 4 mm

$ 30.13

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10.15ct Multicolor Coral, Oval, Translucent

17.3 x 13.7 mm

$ 31.69

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55.78ctw Yellow Rutile Quartz, Sphere / Ball, Transparent

13 mm (calibrated)

$ 24.44

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5.60ct Green Druzy Variscite, Fancy, Opaque

16.7 x 12 mm

$ 26.44

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21.39ct Green Bloodstone, Oval, Opaque

20.9 x 14.4 mm

$ 31.96

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60.01ct White Dendritic Agate, Pear Shape, Opaque

40.8 x 33.9 mm

$ 29.89

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1.73ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 13.79

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36.77ct Gray Hematite, Oval, Opaque

23.1 x 16.7 mm

$ 35.86

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0.33ct Yellow Color-Change Diaspore, Oval, VS

4.4 x 3.7 mm

$ 17.42

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8.36ctw Yellow Citrine, Oval, VVS-VS

14.1 x 9.6 mm

$ 50.19

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7.63ct Violet Amethyst, Pear Shape, Transparent

17.3 x 11.4 mm

$ 45.60

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12.26ct White Rainbow Moonstone, Marquise, Transparent

24.6 x 10.9 mm

$ 97.69

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4.49ct Pink Morganite, Pear Shape, Transparent

15.1 x 9.1 mm

$ 49.19

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31.56ct Multicolor Jasper, Baguette, Opaque

25 x 18 mm (calibrated)

$ 19.36

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1.33ct Purple Spinel, Cushion, VS

7 x 5.7 mm

$ 92.03

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15.56ct Multicolor Jasper, Baguette, Opaque

16.6 x 12.8 mm

$ 9.55

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3.62ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.93

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1.12ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 35.24

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6.11ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 36.69

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11.05ctw Yellow Rutile Quartz, Round, Translucent

11 mm (calibrated)

$ 30.14

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18.19ct Violet Amethyst, Round, VS

18 mm (calibrated)

$ 126.82

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1.55ctw White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 26.24

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2.78ct Yellow Citrine, Flower Cut, Transparent

9 x 9 mm (calibrated)

$ 21.32

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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

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

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

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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Overall Rating -> 10 star ratings

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

Posted By JC Karl in September, 2025
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Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
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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
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