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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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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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9.18ct Green Jadeite, Oval, Translucent

17.8 x 13.7 mm

$ 30.17

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2.87ctw Red Fire Opal, Oval, Translucent

7.1 x 5.4 mm

$ 85.62

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6.13ct White Rose Quartz, Pear Shape, Transparent

20.2 x 11.2 mm

$ 21.36

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1.30ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 22.13

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0.80ct Green Tourmaline, Emerald Cut, VVS

10 x 3 mm

$ 39.84

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3.21ct Yellow Citrine, Cushion, VVS-VS

12 x 8.4 mm

$ 24.62

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2.30ct Yellow Citrine, Oval, VS

10 x 8 mm (calibrated)

$ 12.60

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3.14ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 27.49

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1.26ct Violet Amethyst, Marquise, VS

11.8 x 5.7 mm

$ 9.66

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1.86ct Yellow Citrine, Trillion, VS

9 x 9 mm (calibrated)

$ 14.26

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0.66ct Pink Morganite, Pear Shape, VVS

8 x 5.4 mm

$ 27.39

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1.51ct Orange Hessonite Garnet, Cushion, VVS-VS

7 x 5 mm (calibrated)

$ 27.07

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0.62ct Yellow Color-Change Diaspore, Square, VS

5.3 x 5.1 mm

$ 22.23

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11.61ct Multicolor Boulder Opal, Fancy, Opaque

18.8 x 12.3 mm

$ 34.69

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0.05ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 17.11

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3.17ctw Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 16.73

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1.99ct Violet Amethyst, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 13.08

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1.38ctw Red Rhodolite Garnet, Square, VS

4.8 x 4.8 mm

$ 12.08

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4.37ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 19.98

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3.10ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 23.77

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2.20ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 11.91

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1.46ct Violet Sapphire, Cushion, VS

7.3 x 5.4 mm

$ 699.95

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9.00ctw Green Amazonite, Cushion, Opaque

7.3 x 7.3 mm

$ 21.90

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1.33ct Green Tourmaline, Emerald Cut, VS

15.2 x 3.5 mm

$ 34.97

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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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 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 can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate
Enlarged Gemstone Image