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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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41.25ctw Gray Hematite, Emerald Cut, Opaque

41.25ctw Gray Hematite, Emerald Cut, Opaque

20 x 15 mm (calibrated)

$ 40.22

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16.99ct Purple Ruby-Zoisite, Flower Cut, Opaque

16.99ct Purple Ruby-Zoisite, Flower Cut, Opaque

17.1 x 16.9 mm

$ 20.65

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1.37ct Green Tourmaline, Emerald Cut, VVS

1.37ct Green Tourmaline, Emerald Cut, VVS

18.7 x 3 mm

$ 37.53

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3.95ctw Brown Smoky Quartz, Round, VS

3.95ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 8.66

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1.63ctw Red Pyrope Garnet, Heart, VVS-VS

1.63ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.50

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0.65ct Yellow Citrine, Pear Shape, VVS

0.65ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 3.24

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6.46ctw Pink Strawberry Quartz, Oval, Transparent

6.46ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 48.45

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4.44ctw Yellow Citrine, Oval, VVS-VS

4.44ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 29.18

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29.62ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

29.62ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

27.6 x 18.8 mm

$ 29.50

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0.66ct Orange Zircon, Oval, VVS

0.66ct Orange Zircon, Oval, VVS

5.9 x 3.8 mm

$ 16.43

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21.41ctw Brown Rutile Quartz, Sphere / Ball, Translucent

21.41ctw Brown Rutile Quartz, Sphere / Ball, Translucent

8 mm (calibrated)

$ 23.46

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20.73ct White Howlite, Fancy, Opaque

20.73ct White Howlite, Fancy, Opaque

23.7 x 18.7 mm

$ 9.91

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16.32ct Multicolor Labradorite, Pear Shape, Translucent

16.32ct Multicolor Labradorite, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 36.09

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9.88ct Brown Smoky Quartz, Emerald Cut, VVS-VS

9.88ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 13 mm (calibrated)

$ 16.23

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0.86ct Orange Sphalerite, Oval, SI-I1

0.86ct Orange Sphalerite, Oval, SI-I1

5.9 x 4.9 mm

$ 42.83

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1.20ct Brown Sillimanite Cat'S Eye, Oval, Translucent

1.20ct Brown Sillimanite Cat'S Eye, Oval, Translucent

7.5 x 4.7 mm

$ 3.59

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11.91ct Green Uvarovite Garnet Drusy, Trillion, Opaque

11.91ct Green Uvarovite Garnet Drusy, Trillion, Opaque

18 x 13 mm (calibrated)

$ 17.80

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1.70ct Yellow Citrine, Heart, VVS

1.70ct Yellow Citrine, Heart, VVS

8 x 8 mm (calibrated)

$ 11.85

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5.62ct Multicolor Rainbow Pyrite, Trillion, Opaque

5.62ct Multicolor Rainbow Pyrite, Trillion, Opaque

15.9 x 14.2 mm

$ 19.76

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3.26ct Yellow Citrine, Oval, VS

3.26ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 22.73

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1.63ct Yellow Citrine, Round, VVS

1.63ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.99

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28.67ctw Multicolor Jasper, Cushion, Opaque

28.67ctw Multicolor Jasper, Cushion, Opaque

22 x 14.4 mm

$ 16.85

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21.63ct Violet Amethyst, Emerald Cut, VVS

21.63ct Violet Amethyst, Emerald Cut, VVS

20.4 x 18.4 mm

$ 172.35

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4.74ct Pink Rose Quartz, Emerald Cut, Transparent

4.74ct Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 25.96

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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

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
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Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
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Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate
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