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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
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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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16.34ct Multicolor Agate, Oval, Opaque

16.34ct Multicolor Agate, Oval, Opaque

16 x 16 mm (calibrated)

$ 13.01

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2.77ctw White Topaz, Cushion, VVS-VS

2.77ctw White Topaz, Cushion, VVS-VS

4.5 x 4.5 mm

$ 15.18

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2.41ct Red Almandine Garnet, Oval, VS

2.41ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 90.01

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1.87ct Orange Hessonite Garnet, Emerald Cut, VS

1.87ct Orange Hessonite Garnet, Emerald Cut, VS

6.6 x 6.6 mm

$ 36.89

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82.80ct Blue Sodalite, Square, Opaque

82.80ct Blue Sodalite, Square, Opaque

25.4 x 24.9 mm

$ 68.72

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8.24ctw Multicolor Labradorite, Pear Shape, Translucent

8.24ctw Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 18.22

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4.80ctw White Topaz, Square, VVS-VS

4.80ctw White Topaz, Square, VVS-VS

4.2 x 4.2 mm

$ 38.65

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4.47ct Yellow Citrine, Emerald Cut, VVS-VS

4.47ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 31.17

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12.37ct Multicolor Quartz With Marcasite, Oval, Transparent

12.37ct Multicolor Quartz With Marcasite, Oval, Transparent

18.9 x 13.5 mm

$ 81.32

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15.06ct Blue Larimar, Oval, Opaque

15.06ct Blue Larimar, Oval, Opaque

28.5 x 16.6 mm

$ 158.38

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2.84ct Multicolor Labradorite, Pear Shape, Translucent

2.84ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 6.27

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1.34ct Brown Sillimanite Cat'S Eye, Oval, Transparent

1.34ct Brown Sillimanite Cat'S Eye, Oval, Transparent

7.5 x 4.7 mm

$ 4.00

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4.27ctw Yellow Citrine, Flower Cut, Transparent

4.27ctw Yellow Citrine, Flower Cut, Transparent

8 x 8 mm (calibrated)

$ 32.75

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2.66ct Pink Tourmaline, Oval, VVS-VS
Tourmaline Product Video (521719)

2.66ct Pink Tourmaline, Oval, VVS-VS

8 x 8 mm (calibrated)

$ 238.44

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2.16ct Yellow Cat'S Eye Apatite, Oval, Translucent

2.16ct Yellow Cat'S Eye Apatite, Oval, Translucent

9 x 7 mm (calibrated)

$ 23.66

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61.03ct Brown Jasper, Oval, Opaque

61.03ct Brown Jasper, Oval, Opaque

31.7 x 15.4 mm

$ 31.42

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2.04ctw Red Pyrope Garnet, Marquise, VVS-VS

2.04ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5 mm

$ 17.88

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0.63ct Pink Tourmaline, Round, Transparent

0.63ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 25.10

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5.26ct Brown Moonstone, Oval, Translucent

5.26ct Brown Moonstone, Oval, Translucent

13.5 x 7.7 mm

$ 11.35

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3.26ct Multicolor Labradorite, Round, Translucent

3.26ct Multicolor Labradorite, Round, Translucent

10 mm (calibrated)

$ 7.92

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3.71ct Pink Rose Quartz, Emerald Cut, Transparent

3.71ct Pink Rose Quartz, Emerald Cut, Transparent

9.5 x 9.4 mm

$ 20.33

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8.50ct White Quartz Cat'S Eye, Round, Transparent

8.50ct White Quartz Cat'S Eye, Round, Transparent

12 mm (calibrated)

$ 30.17

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1.14ctw Brown Smoky Quartz, Oval, Translucent

1.14ctw Brown Smoky Quartz, Oval, Translucent

6 x 4 mm (calibrated)

$ 4.24

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23.55ct Brown Moonstone, Oval, Opaque

23.55ct Brown Moonstone, Oval, Opaque

21.9 x 16.1 mm

$ 51.60

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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 -> 7 star ratings

easy interface for a pricless buy

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

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
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Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

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

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
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Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate
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