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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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22.65ct Violet Amethyst, Emerald Cut, VVS-VS

22.65ct Violet Amethyst, Emerald Cut, VVS-VS

20 x 15 mm (calibrated)

$ 157.92

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9.62ct Brown Tiger'S Eye, Oval, Opaque

9.62ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 9.58

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37.55ct Brown Jasper, Cushion, Opaque

37.55ct Brown Jasper, Cushion, Opaque

25.4 x 25.4 mm

$ 57.60

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0.86ct Pink Tourmaline, Round, Transparent

0.86ct Pink Tourmaline, Round, Transparent

5.5 mm (calibrated)

$ 14.25

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4.45ct Violet Amethyst, Pear Shape, VVS

4.45ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 32.32

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0.94ctw White Rainbow Moonstone, Oval, Transparent

0.94ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 30.91

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0.41ct Yellow Citrine, Marquise, VS

0.41ct Yellow Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 3.06

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10.98ct Multicolor Agate, Oval, Opaque

10.98ct Multicolor Agate, Oval, Opaque

15.1 x 12.4 mm

$ 10.94

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0.94ctw Red Pyrope Garnet, Square, VVS-VS

0.94ctw Red Pyrope Garnet, Square, VVS-VS

4.2 x 4.2 mm

$ 4.68

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3.46ctw Multicolor Andalusite, Round, VS
Andalusite Product Video (381931)

3.46ctw Multicolor Andalusite, Round, VS

3.7 mm

$ 151.97

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0.44ct Orange Clinohumite, Round, SI-I1

0.44ct Orange Clinohumite, Round, SI-I1

5 mm (calibrated)

$ 18.26

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3.69ct Yellow Citrine, Pear Shape, VVS-VS

3.69ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 23.16

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1.05ct Green Tourmaline, Emerald Cut, VVS-VS

1.05ct Green Tourmaline, Emerald Cut, VVS-VS

15.7 x 3 mm

$ 22.41

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3.32ctw Yellow Citrine, Emerald Cut, VVS-VS

3.32ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 25.46

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1.79ctw Green Demantoid Garnet, Oval, VS

1.79ctw Green Demantoid Garnet, Oval, VS

4.3 x 3.4 mm

$ 196.11

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1.12ct Yellow Sphene, Oval, VS-SI

1.12ct Yellow Sphene, Oval, VS-SI

6.7 x 5.8 mm

$ 67.49

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2.02ct Yellow Citrine, Trillion, VVS-VS

2.02ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 15.49

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1.25ct Orange Spessartite Garnet, Oval, VS

1.25ct Orange Spessartite Garnet, Oval, VS

8 x 6 mm (calibrated)

$ 300.88

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1.73ctw Red Pyrope Garnet, Pear Shape, VS

1.73ctw Red Pyrope Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 11.37

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0.66ct Violet Amethyst, Marquise, VVS

0.66ct Violet Amethyst, Marquise, VVS

8 x 4.2 mm

$ 4.38

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0.54ct Green Peridot, Marquise, VS

0.54ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.07

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5.22ct Violet Amethyst, Pear Shape, VVS-VS

5.22ct Violet Amethyst, Pear Shape, VVS-VS

15 x 10 mm (calibrated)

$ 39.69

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2.05ct Violet Amethyst, Marquise, VVS-VS

2.05ct Violet Amethyst, Marquise, VVS-VS

12 x 6.1 mm

$ 13.48

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1.64ct Violet Amethyst, Trillion, VS

1.64ct Violet Amethyst, Trillion, VS

8.4 x 8.2 mm

$ 10.84

View Gem
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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 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 -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 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

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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