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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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1.72ctw Violet Amethyst, Heart, Transparent

1.72ctw Violet Amethyst, Heart, Transparent

6 x 6 mm (calibrated)

$ 13.19

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1.06ct Red Rhodolite Garnet, Oval, VS-SI

1.06ct Red Rhodolite Garnet, Oval, VS-SI

7.1 x 5.3 mm

$ 28.15

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3.86ct Pink Morganite, Marquise, Transparent

3.86ct Pink Morganite, Marquise, Transparent

16 x 8 mm (calibrated)

$ 42.29

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4.74ct Multicolor Fire Agate, Fancy, Opaque

4.74ct Multicolor Fire Agate, Fancy, Opaque

15 x 10 mm (calibrated)

$ 66.79

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125.29ct Multicolor Agate, Square, Opaque
Agate Product Video (692638)

125.29ct Multicolor Agate, Square, Opaque

31.6 x 31.3 mm

$ 43.67

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1.53ct Brown Tiger'S Eye, Round, Opaque

1.53ct Brown Tiger'S Eye, Round, Opaque

7 mm (calibrated)

$ 1.53

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3.33ctw Yellow Citrine, Emerald Cut, VS

3.33ctw Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 25.54

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2.94ctw White Topaz, Cushion, VVS-VS

2.94ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.10

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2.62ct Violet Amethyst, Trillion, VS

2.62ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 20.09

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4.39ctw Red Pyrope Garnet, Square, VS

4.39ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 33.66

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3.91ct Violet Amethyst, Pear Shape, VS

3.91ct Violet Amethyst, Pear Shape, VS

13 x 9 mm (calibrated)

$ 29.99

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0.26ct Violet Iolite, Baguette, VS-SI

0.26ct Violet Iolite, Baguette, VS-SI

5 x 3 mm (calibrated)

$ 10.36

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2.91ct Orange Hessonite Garnet, Cushion, SI

2.91ct Orange Hessonite Garnet, Cushion, SI

8 x 8 mm (calibrated)

$ 63.76

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4.27ctw White Topaz, Cushion, VS

4.27ctw White Topaz, Cushion, VS

4.5 x 4.5 mm

$ 23.40

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1.02ct Red Rhodolite Garnet, Oval, VS

1.02ct Red Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 27.09

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20.70ct Yellow Rutile Quartz, Oval, Translucent

20.70ct Yellow Rutile Quartz, Oval, Translucent

21.9 x 13.3 mm

$ 22.68

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18.36ct Purple Ruby-Zoisite, Flower Cut, Opaque

18.36ct Purple Ruby-Zoisite, Flower Cut, Opaque

16.8 x 14.5 mm

$ 22.31

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8.99ct Brown Tiger'S Eye, Cushion, Opaque

8.99ct Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 11.64

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50.88ct Multicolor Tiger'S Eye Matrix, Round, Opaque

50.88ct Multicolor Tiger'S Eye Matrix, Round, Opaque

27.6 mm

$ 50.68

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32.88ct Multicolor Jasper, Oval, Opaque

32.88ct Multicolor Jasper, Oval, Opaque

26.5 x 22.7 mm

$ 20.17

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0.58ct Green Peridot, Marquise, VVS-VS

0.58ct Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 8.67

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52.54ct Green Amazonite, Baguette, Opaque

52.54ct Green Amazonite, Baguette, Opaque

30.6 x 19.4 mm

$ 41.87

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2.22ct Orange Hessonite Garnet, Oval, VS

2.22ct Orange Hessonite Garnet, Oval, VS

8.5 x 7.1 mm

$ 39.50

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28.48ct Multicolor Bloodstone, Oval, Opaque

28.48ct Multicolor Bloodstone, Oval, Opaque

18.2 x 15.6 mm

$ 57.98

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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 -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 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
→ View All GemSelect Reviews on Bizrate
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