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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
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Yellow Untreated Gemstones
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8.02ct Yellow Apatite, Pear Shape, VS

16 x 12 mm (calibrated)

$ 423.52

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1.05ct Purple Spinel, Oval, VVS

6.9 x 5.4 mm

$ 117.72

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3.36ct Multicolor Pietersite, Round, Opaque

11 mm (calibrated)

$ 7.93

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3.57ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 21.82

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0.58ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 4.62

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1.99ct Violet Amethyst, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 10.91

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25.25ct Bi-Color Ametrine, Oval, VVS-VS

24.9 x 15.6 mm

$ 138.33

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0.60ct Yellow Grossularite Garnet, Round, VS

5 mm (calibrated)

$ 13.50

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1.17ct Purple Spinel, Cushion, VVS-VS

6 x 6 mm (calibrated)

$ 82.33

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6.54ct Violet Amethyst, Marquise, VS

18 x 9.4 mm

$ 50.16

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11.71ct Green Amazonite, Fancy, Opaque

17.2 x 12.1 mm

$ 11.89

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24.06ctw Multicolor Jasper, Pear Shape, Opaque

33.5 x 12.1 mm

$ 39.54

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25.64ct Violet Amethyst, Round, VVS-VS

20 mm (calibrated)

$ 178.77

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0.94ct Violet Amethyst, Marquise, VVS-VS

10 x 5 mm (calibrated)

$ 6.24

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7.48ct Violet Amethyst, Pear Shape, Transparent

18.8 x 11.6 mm

$ 49.17

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1.11ct Purple Rhodolite Garnet, Oval, VVS

6.7 x 5.4 mm

$ 38.69

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18.91ct Pink Rose Quartz, Oval, Transparent

18 x 13 mm (calibrated)

$ 24.86

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31.92ct Yellow Calcite, Pear Shape, Translucent

36.8 x 17.2 mm

$ 21.93

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10.76ctw Orange Moonstone, Round, Opaque

11 mm (calibrated)

$ 17.95

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5.15ct Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 21.37

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1.44ct Multicolor Opal, Pear Shape, Transparent

11.3 x 8.3 mm

$ 67.84

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19.62ct Pink Rose Quartz, Oval, Transparent

18 x 13 mm (calibrated)

$ 25.79

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3.06ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 22.92

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0.60ct Green Cat'S Eye Alexandrite, Oval, Opaque

4.9 x 4.6 mm

$ 124.50

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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

Easy to use website

Posted By Mel in February, 2026
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Overall Rating -> 8 star ratings

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

Posted By Jon in December, 2025
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Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 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

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
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Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate
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