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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.73ct Yellow Citrine, Heart, Transparent

0.73ct Yellow Citrine, Heart, Transparent

6 x 6 mm (calibrated)

$ 5.09

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2.17ctw Yellow Citrine, Square, VVS-VS

2.17ctw Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 14.99

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3.01ct Violet Amethyst, Fancy, VVS

3.01ct Violet Amethyst, Fancy, VVS

9.5 x 9.3 mm

$ 23.99

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2.65ct Green Tourmaline, Emerald Cut, VVS

2.65ct Green Tourmaline, Emerald Cut, VVS

23.8 x 3.7 mm

$ 101.63

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3.17ct Yellow Rutile Quartz, Pear Shape, Translucent

3.17ct Yellow Rutile Quartz, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 8.55

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1.84ct Brown Tiger'S Eye, Baguette, Opaque

1.84ct Brown Tiger'S Eye, Baguette, Opaque

8 x 6 mm (calibrated)

$ 1.83

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3.07ctw Brown Tourmaline, Oval, VS
Tourmaline Product Video (379294)

3.07ctw Brown Tourmaline, Oval, VS

7 x 5 mm (calibrated)

$ 152.60

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12.34ct Yellow Rutile Quartz, Oval, Translucent

12.34ct Yellow Rutile Quartz, Oval, Translucent

25.2 x 11.6 mm

$ 33.81

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42.52ct White Rainbow Moonstone, Fancy, Opaque

42.52ct White Rainbow Moonstone, Fancy, Opaque

44.2 x 11 mm

$ 3.53

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17.06ct Brown Tiger'S Eye, Fancy, Opaque

17.06ct Brown Tiger'S Eye, Fancy, Opaque

34.5 x 8 mm

$ 1.70

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2.82ct Yellow Golden Beryl, Oval, VVS

2.82ct Yellow Golden Beryl, Oval, VVS

11 x 9 mm (calibrated)

$ 70.57

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4.07ctw Brown Smoky Quartz, Round, VVS-VS

4.07ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 8.91

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3.62ct Pink Morganite, Trillion, Transparent

3.62ct Pink Morganite, Trillion, Transparent

11 x 11 mm (calibrated)

$ 39.66

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1.17ct Green Tourmaline, Emerald Cut, VS

1.17ct Green Tourmaline, Emerald Cut, VS

13.4 x 3.6 mm

$ 22.49

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0.62ct Yellow Citrine, Pear Shape, VVS

0.62ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.09

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1.17ct Pink Tourmaline, Round, Transparent

1.17ct Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 19.39

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25.59ctw Multicolor Jasper, Sphere / Ball, Opaque

25.59ctw Multicolor Jasper, Sphere / Ball, Opaque

12 mm (calibrated)

$ 28.04

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7.46ct White Quartz Cat'S Eye, Round, Transparent

7.46ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 32.69

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2.17ct Orange Hessonite Garnet, Cushion, VVS-VS

2.17ct Orange Hessonite Garnet, Cushion, VVS-VS

7 x 7 mm (calibrated)

$ 40.97

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0.68ct Orange Sphalerite, Oval, SI-I1

0.68ct Orange Sphalerite, Oval, SI-I1

5.3 x 4.5 mm

$ 33.86

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10.89ct Green Maw-Sit-Sit, Pear Shape, Opaque

10.89ct Green Maw-Sit-Sit, Pear Shape, Opaque

16.7 x 10.4 mm

$ 35.80

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6.74ct Multicolor Coral, Oval, Opaque

6.74ct Multicolor Coral, Oval, Opaque

15.2 x 10.9 mm

$ 14.77

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2.75ct Green Fluorite, Pear Shape, Transparent

2.75ct Green Fluorite, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 11.29

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8.82ct Multicolor Agate, Oval, Translucent

8.82ct Multicolor Agate, Oval, Translucent

13 x 13 mm (calibrated)

$ 17.57

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

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 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

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 have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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