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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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6.02ct Green Quartz Cat'S Eye, Oval, Opaque

6.02ct Green Quartz Cat'S Eye, Oval, Opaque

11.2 x 10.1 mm

$ 19.79

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3.18ct Yellow Citrine, Oval, VVS-VS

3.18ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 22.17

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1.64ctw Red Pyrope Garnet, Heart, VVS-VS

1.64ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.58

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16.40ct Green Maw-Sit-Sit, Round, Opaque

16.40ct Green Maw-Sit-Sit, Round, Opaque

14 mm (calibrated)

$ 53.90

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1.34ct Pink Malaya Garnet, Round, VS

1.34ct Pink Malaya Garnet, Round, VS

6.5 mm (calibrated)

$ 62.40

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2.00ctw Orange Spessartite Garnet, Oval, VS

2.00ctw Orange Spessartite Garnet, Oval, VS

5.3 x 4.3 mm

$ 76.48

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6.28ct Brown Tiger'S Eye, Baguette, Opaque

6.28ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 6.26

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3.80ctw White Rainbow Moonstone, Square, Transparent
Rainbow Moonstone Product Video (312016)

3.80ctw White Rainbow Moonstone, Square, Transparent

3.2 x 3.2 mm

$ 58.98

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56.47ct Blue Larimar, Baguette, Opaque
Larimar Product Video (492080)

56.47ct Blue Larimar, Baguette, Opaque

31.6 x 20.2 mm

$ 607.47

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4.19ct White Topaz, Heart, VVS-VS

4.19ct White Topaz, Heart, VVS-VS

10 x 10 mm (calibrated)

$ 34.78

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19.89ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

19.89ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

25.6 x 12.7 mm

$ 8.91

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1.06ct Pink Tourmaline, Round, Transparent

1.06ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 17.57

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2.21ctw Green Peridot, Round, VVS-VS

2.21ctw Green Peridot, Round, VVS-VS

5 mm (calibrated)

$ 36.32

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2.46ct Black Cat'S Eye Scapolite, Round, Translucent

2.46ct Black Cat'S Eye Scapolite, Round, Translucent

9 mm (calibrated)

$ 13.48

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6.54ct Pink Kunzite, Emerald Cut, VS

6.54ct Pink Kunzite, Emerald Cut, VS

13.3 x 7.9 mm

$ 172.62

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1.73ct Green Prehnite, Oval, Transparent

1.73ct Green Prehnite, Oval, Transparent

8.5 x 7.1 mm

$ 9.48

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4.77ct Violet Amethyst, Pear Shape, VVS

4.77ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 28.50

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3.43ctw Red Pyrope Garnet, Square, VS

3.43ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 26.30

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1.26ct Violet Spinel, Pear Shape, VS-SI

1.26ct Violet Spinel, Pear Shape, VS-SI

9 x 5.4 mm

$ 141.59

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7.05ct Multicolor Fire Agate, Fancy, Opaque

7.05ct Multicolor Fire Agate, Fancy, Opaque

17.6 x 9.2 mm

$ 60.17

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2.58ctw Violet Amethyst, Oval, VVS-VS

2.58ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 14.13

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1.37ct Yellow Golden Beryl, Oval, VVS-VS

1.37ct Yellow Golden Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 34.11

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1.63ct Pink Tourmaline, Oval, VS
Tourmaline Product Video (525282)

1.63ct Pink Tourmaline, Oval, VS

7.7 x 6.8 mm

$ 250.01

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1.90ct Orange Hessonite Garnet, Round, VS-SI

1.90ct Orange Hessonite Garnet, Round, VS-SI

7.5 mm (calibrated)

$ 26.64

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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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

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
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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