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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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1.52ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.30

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2.93ct Brown Smoky Quartz, Marquise, VVS

17.8 x 7.1 mm

$ 14.59

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9.00ctw Green Amazonite, Cushion, Opaque

7.3 x 7.3 mm

$ 21.90

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1.54ctw Yellow Citrine, Marquise, VVS-VS

5.9 x 3 mm

$ 8.43

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7.78ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 45.48

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19.78ct Multicolor Labradorite, Round, Opaque

19 mm (calibrated)

$ 17.73

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1.05ct Yellow Color-Change Diaspore, Cushion, VVS-VS

8.1 x 5.2 mm

$ 54.07

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2.73ctw Orange Hessonite Garnet, Emerald Cut, VS

7.4 x 5.4 mm

$ 41.38

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11.65ct Multicolor Labradorite, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 25.75

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4.89ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 26.79

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1.61ct Orange Hessonite Garnet, Oval, VS-SI

7.9 x 6.6 mm

$ 26.46

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0.70ct Purple Spinel, Cushion, VVS-VS

6 x 5.2 mm

$ 58.10

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2.15ct Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 11.79

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2.59ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 5.16

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35.21ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

29 x 18.7 mm

$ 15.78

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2.27ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 40.69

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21.20ct Multicolor Jasper, Fancy, Opaque

29.1 x 13.9 mm

$ 13.24

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0.65ct Pink Tourmaline, Round, Transparent

5.3 mm

$ 25.90

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0.63ct Violet Spinel, Round, VS

5 mm (calibrated)

$ 33.05

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4.90ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 58.56

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23.07ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 75.83

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1.75ct Multicolor Opal, Oval, Transparent

10.9 x 7.9 mm

$ 78.44

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1.23ctw White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 20.82

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2.50ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.70

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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

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

Posted By JC Karl in September, 2025
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Overall Rating -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
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Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

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

Great selection of gems at a reasonable price

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

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate
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