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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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0.29ct Pink Morganite, Round, VS-SI

0.29ct Pink Morganite, Round, VS-SI

4.5 mm (calibrated)

$ 12.04

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2.29ct Yellow Citrine, Trillion, VVS-VS

2.29ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 12.39

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3.32ct White Rainbow Moonstone, Oval, Transparent

3.32ct White Rainbow Moonstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 56.51

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9.78ct Black Tourmaline, Emerald Cut, Opaque

9.78ct Black Tourmaline, Emerald Cut, Opaque

15 x 10 mm (calibrated)

$ 48.70

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3.66ct Violet Amethyst, Pear Shape, VVS-VS

3.66ct Violet Amethyst, Pear Shape, VVS-VS

13 x 9 mm (calibrated)

$ 28.07

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11.99ct Green Maw-Sit-Sit, Oval, Opaque

11.99ct Green Maw-Sit-Sit, Oval, Opaque

14 x 12 mm (calibrated)

$ 39.41

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2.04ct Orange Hessonite Garnet, Cushion, VS-SI

2.04ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 34.30

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18.38ct Brown Star Sunstone, Round, Opaque

18.38ct Brown Star Sunstone, Round, Opaque

17 mm (calibrated)

$ 152.55

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23.67ctw Multicolor Jasper, Cushion, Opaque

23.67ctw Multicolor Jasper, Cushion, Opaque

19.8 x 16.3 mm

$ 13.91

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4.80ct Yellow Citrine, Oval, VS
Citrine Product Video (635568)

4.80ct Yellow Citrine, Oval, VS

14 x 10 mm (calibrated)

$ 33.47

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37.38ct Multicolor Feather Pyrite, Oval, Opaque

37.38ct Multicolor Feather Pyrite, Oval, Opaque

33.3 x 20.1 mm

$ 29.17

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26.80ct Gray Hematite, Marquise, Opaque

26.80ct Gray Hematite, Marquise, Opaque

27.9 x 13.1 mm

$ 27.02

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1.78ct Multicolor Labradorite, Pear Shape, Translucent

1.78ct Multicolor Labradorite, Pear Shape, Translucent

9 x 6 mm (calibrated)

$ 3.93

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9.32ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (395818)

9.32ct Yellow Apatite, Emerald Cut, VS

11.6 x 11.4 mm

$ 379.04

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34.18ct Green Maw-Sit-Sit, Baguette, Opaque
Maw-Sit-Sit Product Video (476875)

34.18ct Green Maw-Sit-Sit, Baguette, Opaque

19.7 x 16.3 mm

$ 112.34

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10.93ct Brown Tiger'S Eye, Baguette, Opaque

10.93ct Brown Tiger'S Eye, Baguette, Opaque

16 x 12 mm (calibrated)

$ 14.15

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5.02ct Pink Strawberry Quartz, Round, Translucent

5.02ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 38.50

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2.81ct Violet Amethyst, Trillion, VS

2.81ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 15.40

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1.70ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.70ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 33.52

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5.40ct Blue Chalcedony, Cushion, Translucent

5.40ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 16.81

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25.96ct Multicolor Jasper, Oval, Opaque

25.96ct Multicolor Jasper, Oval, Opaque

28.8 x 19.5 mm

$ 21.33

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0.50ct Green Peridot, Marquise, VS

0.50ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 7.47

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6.86ct Multicolor Agate, Oval, Opaque

6.86ct Multicolor Agate, Oval, Opaque

12 x 10 mm (calibrated)

$ 11.61

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1.14ct Green Tourmaline, Emerald Cut, VVS-VS

1.14ct Green Tourmaline, Emerald Cut, VVS-VS

14.6 x 3 mm

$ 29.98

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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 found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
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Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

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

the selection is good as are the prices

Posted By Old man in August, 2025
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Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
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Overall Rating -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 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
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