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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

Size Explained

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For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.66ctw Orange Moonstone, Cushion, Translucent

8 x 6 mm (calibrated)

$ 5.83

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2.92ctw Red Pyrope Garnet, Square, VVS-VS

6 x 6 mm (calibrated)

$ 22.39

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6.15ct Brown Mother Of Pearl, Fancy, Opaque

19.6 x 13.2 mm

$ 13.40

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3.52ct Multicolor Agate, Oval, Translucent

8.4 x 8.2 mm

$ 7.01

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16.29ct Green Amazonite, Oval, Opaque

24.8 x 18.6 mm

$ 16.55

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1.10ct Green Peridot, Oval, VVS-VS

7.8 x 5.7 mm

$ 9.86

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13.17ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 104.94

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0.50ct Multicolor Opal, Pear Shape, Transparent

8 x 5 mm (calibrated)

$ 12.45

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1.22ct Purple Sapphire, Cushion, VVS-VS

6.4 x 5.1 mm

$ 644.25

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0.82ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 224.60

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7.44ct Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 40.02

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1.51ct Yellow Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 28.83

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5.38ctw Red Almandine Garnet, Round, Transparent

3 mm (calibrated)

$ 29.47

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0.96ct Orange Zircon, Oval, VVS-VS

5.9 x 4.9 mm

$ 11.95

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12.94ct White Rainbow Moonstone, Pear Shape, Transparent

17.8 x 13.9 mm

$ 231.99

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5.71ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 31.28

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13.22ct Multicolor Jasper, Oval, Opaque

20 x 15 mm (calibrated)

$ 21.72

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1.33ct Green Tourmaline, Emerald Cut, VVS-VS

12.6 x 3.7 mm

$ 33.12

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3.16ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 17.31

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2.40ctw Orange Moonstone, Cushion, Translucent

6 x 6 mm (calibrated)

$ 5.26

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0.37ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

4.1 x 3.8 mm

$ 11.06

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1.49ct Green Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 24.69

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1.09ct Yellow Color-Change Diaspore, Marquise, VS-SI

10.7 x 4.7 mm

$ 58.08

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9.54ct Yellow Citrine, Oval, VVS

18.1 x 12.2 mm

$ 73.16

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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 was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

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

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate
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