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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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9.22ct Pink Strawberry Quartz, Oval, Translucent

9.22ct Pink Strawberry Quartz, Oval, Translucent

16 x 12 mm (calibrated)

$ 55.36

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39.85ct Multicolor Rainbow Moonstone, Fancy, Opaque

39.85ct Multicolor Rainbow Moonstone, Fancy, Opaque

42 x 11 mm

$ 3.98

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13.52ctw Green Aventurine, Fancy, Translucent

13.52ctw Green Aventurine, Fancy, Translucent

18 x 13 mm (calibrated)

$ 29.62

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7.34ctw Violet Amethyst, Oval, Transparent

7.34ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 40.21

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1.07ct Purple Spinel, Cushion, VS

1.07ct Purple Spinel, Cushion, VS

6.5 x 5.5 mm

$ 127.89

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1.12ct Purple Spinel, Oval, VS

1.12ct Purple Spinel, Oval, VS

7 x 5 mm (calibrated)

$ 185.92

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1.06ct Orange Zircon, Oval, VVS-VS

1.06ct Orange Zircon, Oval, VVS-VS

5.7 x 4.9 mm

$ 15.84

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1.99ct Orange Moonstone, Cushion, Translucent

1.99ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 3.97

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0.56ctw Brown Diamond, Round, VS-SI
Diamond Product Video (700078)

0.56ctw Brown Diamond, Round, VS-SI

4.3 mm

$ 745.22

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4.34ctw Violet Amethyst, Oval, VVS-VS

4.34ctw Violet Amethyst, Oval, VVS-VS

6.1 x 4.2 mm

$ 23.77

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1.77ct Blue Cavansite, Fancy, Opaque

1.77ct Blue Cavansite, Fancy, Opaque

10.5 x 8.3 mm

$ 10.28

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0.85ct Yellow Sphalerite, Oval, SI

0.85ct Yellow Sphalerite, Oval, SI

5.7 x 4.6 mm

$ 42.33

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6.40ct Yellow Citrine, Oval, VS

6.40ct Yellow Citrine, Oval, VS

14.7 x 11.2 mm

$ 38.78

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6.54ct Violet Amethyst, Pear Shape, VVS-VS

6.54ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 50.16

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12.77ct Violet Charoite, Pear Shape, Opaque

12.77ct Violet Charoite, Pear Shape, Opaque

24.7 x 11.9 mm

$ 43.62

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3.02ct Green Prehnite, Pear Shape, Transparent/Translucent

3.02ct Green Prehnite, Pear Shape, Transparent/Translucent

10 x 6.5 mm

$ 6.62

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44.07ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

44.07ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

37 x 23.2 mm

$ 25.46

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1.89ct Orange Hessonite Garnet, Oval, VS-SI

1.89ct Orange Hessonite Garnet, Oval, VS-SI

8.1 x 6.8 mm

$ 41.42

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2.57ctw Orange Sunstone, Oval, Translucent

2.57ctw Orange Sunstone, Oval, Translucent

6.1 x 4.3 mm

$ 19.71

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1.89ct Pink Strawberry Quartz, Round, Translucent

1.89ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.49

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1.29ct Yellow Chrysoberyl, Pear Shape, VS
Chrysoberyl Product Video (366487)

1.29ct Yellow Chrysoberyl, Pear Shape, VS

8 x 6 mm (calibrated)

$ 150.34

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10.78ct Red Star Garnet, Oval, Opaque

10.78ct Red Star Garnet, Oval, Opaque

12 x 12 mm (calibrated)

$ 11.16

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50.43ct Multicolor Jasper, Pear Shape, Opaque

50.43ct Multicolor Jasper, Pear Shape, Opaque

36.9 x 27.4 mm

$ 34.26

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1.06ct Purple Spinel, Pear Shape, VVS-VS

1.06ct Purple Spinel, Pear Shape, VVS-VS

6.4 x 5.4 mm

$ 179.28

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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 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 -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate
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