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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
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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.26ct Purple Spinel, Oval, VS

7.7 x 5.7 mm

$ 153.39

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4.07ct Pink Coral, Flower Cut, Opaque

9.9 x 4.4 mm

$ 61.17

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23.76ct Black Nuummite, Oval, Opaque

19.2 x 16.8 mm

$ 97.50

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55.03ct Pink Rose Quartz, Trillion, Transparent

29.2 x 24.5 mm

$ 98.89

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19.12ct Multicolor Quartz With Hedenbergite, Trillion, Transparent

24 x 14.7 mm

$ 78.55

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1.18ct Green Tsavorite Garnet, Oval, SI

6.5 x 5.5 mm

$ 646.40

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38.51ct Green Fluorite, Round, Transparent

20 mm (calibrated)

$ 70.32

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143.91ct Multicolor Rhodochrosite, Fancy, Opaque

43.7 x 25.5 mm

$ 132.70

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1.07ct Yellow Chrysoberyl, Oval, VVS-VS

7.4 x 5.5 mm

$ 124.77

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57.02ct Multicolor Amethyst Geode Slice, Fancy, Transparent

34.5 x 27.6 mm

$ 60.76

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17.32ct Brown Smoky Quartz, Fancy, Transparent

33.2 x 18.6 mm

$ 28.47

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12.03ct Turquoise Larimar, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 158.16

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20.64ct Blue Chalcedony, Marquise, Opaque

32.4 x 15.7 mm

$ 51.39

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15.45ct Multicolor Quartz With Marcasite, Fancy, Transparent

24.1 x 15.1 mm

$ 84.64

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6.59ctw Blue Larimar, Oval, Opaque

11 x 9 mm (calibrated)

$ 65.00

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3.75ct Multicolor Ruby In Fuchsite, Marquise, Translucent

19.8 x 9.2 mm

$ 28.05

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12.71ct Multicolor Fire Agate, Fancy, Opaque

23.3 x 10.6 mm

$ 83.08

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4.13ct Brown Moonstone, Flower Cut, Translucent

13 x 13 mm (calibrated)

$ 18.09

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34.00ct Green Maw-Sit-Sit, Round, Opaque

19 mm (calibrated)

$ 101.59

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11.83ct Blue Chalcedony, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 29.47

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9.28ct Green Maw-Sit-Sit, Round, Opaque

13 mm (calibrated)

$ 28.68

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7.56ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 33.13

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23.46ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 136.30

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1.35ct Yellow Color-Change Diaspore, Pear Shape, VS-SI

9.5 x 5.5 mm

$ 64.64

View Gem
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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

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate
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