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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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0.42ct Yellow Citrine, Heart, VVS

0.42ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.34

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2.81ct White Opal, Oval, Transparent

2.81ct White Opal, Oval, Transparent

13 x 9 mm (calibrated)

$ 70.67

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18.41ctw Brown Tiger'S Eye, Baguette, Opaque

18.41ctw Brown Tiger'S Eye, Baguette, Opaque

16 x 12 mm (calibrated)

$ 18.33

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16.65ct Green Druzy Variscite, Fancy, Opaque

16.65ct Green Druzy Variscite, Fancy, Opaque

25.1 x 15.2 mm

$ 70.65

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1.98ct Yellow Citrine, Trillion, VVS

1.98ct Yellow Citrine, Trillion, VVS

9 x 9 mm (calibrated)

$ 13.01

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1.33ct Orange Hessonite Garnet, Emerald Cut, SI

1.33ct Orange Hessonite Garnet, Emerald Cut, SI

6.3 x 6.3 mm

$ 24.95

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1.87ctw Red Pyrope Garnet, Square, VS

1.87ctw Red Pyrope Garnet, Square, VS

4.7 x 4.6 mm

$ 14.34

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13.24ct Violet Amethyst, Round, VVS

13.24ct Violet Amethyst, Round, VVS

16 mm (calibrated)

$ 92.31

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2.30ctw White Rainbow Moonstone, Oval, Transparent

2.30ctw White Rainbow Moonstone, Oval, Transparent

7 x 6 mm

$ 40.95

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0.96ctw Yellow Citrine, Marquise, VS

0.96ctw Yellow Citrine, Marquise, VS

8 x 4 mm (calibrated)

$ 6.69

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1.03ct Orange Zircon, Oval, VVS

1.03ct Orange Zircon, Oval, VVS

6 x 4.9 mm

$ 25.65

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8.47ct Violet Amethyst, Pear Shape, VVS-VS

8.47ct Violet Amethyst, Pear Shape, VVS-VS

18 x 13 mm (calibrated)

$ 64.40

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1.17ct Turquoise Tourmaline, Round, Transparent
Tourmaline Product Video (749638)

1.17ct Turquoise Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 29.13

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10.94ctw Multicolor Pietersite, Pear Shape, Opaque

10.94ctw Multicolor Pietersite, Pear Shape, Opaque

20.7 x 9.9 mm

$ 48.31

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4.68ctw Yellow Citrine, Square, VVS-VS

4.68ctw Yellow Citrine, Square, VVS-VS

8 x 8 mm (calibrated)

$ 35.90

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10.87ctw Multicolor Fluorite, Pear Shape, Transparent

10.87ctw Multicolor Fluorite, Pear Shape, Transparent

16.7 x 10 mm

$ 45.11

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1.25ct Orange Sphalerite, Oval, SI

1.25ct Orange Sphalerite, Oval, SI

6.6 x 5.7 mm

$ 62.25

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1.82ctw Orange Hessonite Garnet, Square, VS

1.82ctw Orange Hessonite Garnet, Square, VS

3.5 x 3.5 mm

$ 38.71

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17.40ctw Gray Hematite, Oval, Opaque

17.40ctw Gray Hematite, Oval, Opaque

18.1 x 9 mm

$ 12.86

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29.73ctw Multicolor Fossil Coral, Trillion, Opaque

29.73ctw Multicolor Fossil Coral, Trillion, Opaque

22 x 14.2 mm

$ 32.57

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2.24ctw Multicolor Andalusite, Round, VS

2.24ctw Multicolor Andalusite, Round, VS

4 mm (calibrated)

$ 110.44

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1.05ct Yellow Color-Change Diaspore, Cushion, VVS-VS

1.05ct Yellow Color-Change Diaspore, Cushion, VVS-VS

6.7 x 6 mm

$ 54.95

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0.80ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

0.80ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

10.6 x 4 mm

$ 28.05

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0.96ctw Red Pyrope Garnet, Square, VVS-VS

0.96ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 7.36

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 -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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