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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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0.69ct Green Tourmaline, Emerald Cut, VS

5.3 x 4.1 mm

$ 34.36

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0.83ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

10.9 x 4 mm

$ 29.10

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40.50ct Multicolor Jasper, Oval, Opaque

36.2 x 24.3 mm

$ 44.37

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9.72ctw Green Prehnite, Fancy, Translucent

15.6 x 9.8 mm

$ 15.98

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26.77ct Multicolor Jasper, Square, Opaque

20 x 20 mm (calibrated)

$ 21.12

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24.67ctw Multicolor Fossil Coral, Cushion, Opaque

18.9 x 11.2 mm

$ 48.65

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2.77ct Orange Moonstone, Marquise, Translucent

14 x 7 mm (calibrated)

$ 5.52

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3.76ct Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 20.60

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2.39ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.10

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3.13ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 20.58

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2.12ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 79.18

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2.83ct Green Apatite, Emerald Cut, VS

8.8 x 8.5 mm

$ 77.52

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7.66ct Yellow Citrine, Round, VVS-VS

13 mm (calibrated)

$ 41.96

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56.25ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

37 x 24.6 mm

$ 25.21

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1.61ct Orange Hessonite Garnet, Oval, VVS-VS

7.6 x 6.1 mm

$ 32.07

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1.22ct Yellow Beryl, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 24.30

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6.14ct Yellow Cat'S Eye Opal, Oval, Translucent

15 x 10 mm (calibrated)

$ 20.18

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1.96ct Orange Hessonite Garnet, Oval, VS

8.3 x 6.8 mm

$ 29.23

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0.24ct Violet Amethyst, Emerald Cut, VS-SI

5 x 3 mm (calibrated)

$ 1.39

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7.48ct Multicolor Boulder Opal, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 52.15

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1.12ctw Violet Amethyst, Marquise, VS

8 x 4 mm (calibrated)

$ 7.44

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5.78ctw Yellow Citrine, Pear Shape, VS

8.2 x 5.2 mm

$ 31.66

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1.28ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 19.03

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16.86ct Multicolor Agate, Oval, Opaque

17 x 14 mm

$ 16.79

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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

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 -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate
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