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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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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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1.81ct Yellow Citrine, Square, VS

1.81ct Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 11.90

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20.73ct Pink Rose Quartz, Oval, Transparent

20.73ct Pink Rose Quartz, Oval, Transparent

17 x 17 mm (calibrated)

$ 45.43

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2.25ct Green Peridot, Cushion, VS

2.25ct Green Peridot, Cushion, VS

9 x 7 mm (calibrated)

$ 88.59

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24.48ct Black Nuummite, Oval, Opaque

24.48ct Black Nuummite, Oval, Opaque

20 x 16 mm

$ 100.45

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42.80ct Violet Charoite, Oval, Opaque

42.80ct Violet Charoite, Oval, Opaque

32.6 x 25.6 mm

$ 70.33

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0.89ctw Red Pyrope Garnet, Square, VVS-VS

0.89ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 6.82

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8.50ct Multicolor Agate, Fancy, Opaque

8.50ct Multicolor Agate, Fancy, Opaque

16.7 x 7 mm

$ 14.89

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24.59ct Gray Hematite, Baguette, Opaque

24.59ct Gray Hematite, Baguette, Opaque

18.7 x 13.6 mm

$ 24.78

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5.79ctw White Topaz, Oval, VVS-VS

5.79ctw White Topaz, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 31.72

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18.42ct Orange Druzy Citrine, Oval, Opaque

18.42ct Orange Druzy Citrine, Oval, Opaque

19 x 10.9 mm

$ 34.86

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0.18ct Violet Iolite, Baguette, VS-SI

0.18ct Violet Iolite, Baguette, VS-SI

5 x 3 mm (calibrated)

$ 7.17

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18.05ctw Multicolor Jasper, Pear Shape, Opaque

18.05ctw Multicolor Jasper, Pear Shape, Opaque

23.1 x 13.8 mm

$ 10.61

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2.07ct Orange Moonstone, Trillion, Translucent

2.07ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 4.13

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2.20ctw Red Pyrope Garnet, Emerald Cut, VS

2.20ctw Red Pyrope Garnet, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 16.87

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0.99ct Purple Spinel, Cushion, VS

0.99ct Purple Spinel, Cushion, VS

5.8 x 5.3 mm

$ 73.37

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3.40ct Multicolor Opal, Oval, Transparent

3.40ct Multicolor Opal, Oval, Transparent

16.5 x 10.8 mm

$ 152.39

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12.95ct Multicolor Agate, Oval, Opaque

12.95ct Multicolor Agate, Oval, Opaque

20.9 x 12.1 mm

$ 10.32

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0.07ct Black Diamond, Round, Opaque

0.07ct Black Diamond, Round, Opaque

2.5 mm (calibrated)

$ 33.87

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25.44ct White Scolecite, Cushion, Opaque

25.44ct White Scolecite, Cushion, Opaque

27 x 20 mm (calibrated)

$ 27.87

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0.68ct Orange Sphalerite, Oval, SI

0.68ct Orange Sphalerite, Oval, SI

5.5 x 4.5 mm

$ 33.86

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8.34ctw Violet Amethyst, Oval, Transparent

8.34ctw Violet Amethyst, Oval, Transparent

12 x 8 mm (calibrated)

$ 45.68

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2.34ct Bi-Color Ametrine, Emerald Cut, VVS

2.34ct Bi-Color Ametrine, Emerald Cut, VVS

9 x 7 mm (calibrated)

$ 24.55

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1.67ct Multicolor Opal, Pear Shape, Translucent

1.67ct Multicolor Opal, Pear Shape, Translucent

12.6 x 7.6 mm

$ 64.04

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1.34ct White Rainbow Moonstone, Round, Transparent

1.34ct White Rainbow Moonstone, Round, Transparent

7 mm (calibrated)

$ 22.81

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

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
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Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
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Overall Rating -> 10 star ratings

Very good

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

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate
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