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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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16.04ctw Green Prehnite, Flower Cut, Translucent

18.8 x 11.9 mm

$ 24.25

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39.87ct Violet Amethyst, Oval, VVS-VS

25 x 18 mm (calibrated)

$ 264.74

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2.71ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 20.78

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22.75ct Yellow Calcite, Pear Shape, Translucent

31.3 x 15.8 mm

$ 15.64

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21.15ct White Rainbow Moonstone, Oval, Translucent

22.6 x 13.2 mm

$ 21.07

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6.31ct White Rose Quartz, Flower Cut, Transparent

14 x 14 mm (calibrated)

$ 13.83

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8.48ct Yellow Citrine, Briolette, VVS

15 x 10 mm (calibrated)

$ 40.18

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0.88ct Brown Smoky Quartz, Round, Transparent

6 mm (calibrated)

$ 6.13

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1.22ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 38.89

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27.85ct Multicolor Labradorite, Round, Translucent

24.7 mm

$ 61.59

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0.55ct Green Tourmaline, Baguette, VVS

17 x 2.2 mm

$ 15.98

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7.50ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 32.87

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1.29ct Green Sphene, Oval, Transparent

6 x 6 mm (calibrated)

$ 6.42

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1.96ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 13.66

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2.32ct Yellow Sillimanite, Oval, VS

9 x 7 mm (calibrated)

$ 57.37

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5.41ct Gray Star Sapphire, Oval, Translucent

9.5 x 8.3 mm

$ 157.16

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0.46ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 6.87

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1.44ct Yellow Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 28.68

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6.26ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 48.01

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0.58ct Pink Spinel, Cushion, VVS

5 x 4.3 mm

$ 40.44

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0.98ct Yellow Zircon, Oval, VS

6 x 4.8 mm

$ 24.40

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59.73ct Green Amazonite, Oval, Opaque

37 x 24.9 mm

$ 47.59

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1.71ct Green Tourmaline, Baguette, VS

9.7 x 4.4 mm

$ 59.61

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21.04ctw Multicolor Fossil Coral, Oval, Opaque

20.7 x 12.3 mm

$ 23.05

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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 -> 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

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
Source: Bizrate
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