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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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Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.71ctw White Topaz, Cushion, VVS-VS

2.71ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 14.85

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0.38ct Green Kornerupine, Oval, VS

0.38ct Green Kornerupine, Oval, VS

5 x 4 mm (calibrated)

$ 32.55

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1.92ct Gray Cat'S Eye Alexandrite, Round, Opaque

1.92ct Gray Cat'S Eye Alexandrite, Round, Opaque

6.5 mm (calibrated)

$ 384.00

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21.10ct Multicolor Jasper, Cushion, Opaque

21.10ct Multicolor Jasper, Cushion, Opaque

28.9 x 13.9 mm

$ 17.44

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2.56ct Green Tourmaline, Emerald Cut, SI

2.56ct Green Tourmaline, Emerald Cut, SI

20 x 4.3 mm

$ 70.12

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1.90ct Brown Smoky Quartz, Cushion, VVS

1.90ct Brown Smoky Quartz, Cushion, VVS

9 x 7 mm (calibrated)

$ 13.25

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8.52ct White Rainbow Moonstone, Marquise, Transparent

8.52ct White Rainbow Moonstone, Marquise, Transparent

23.8 x 7.9 mm

$ 152.74

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1.62ctw Yellow Citrine, Square, VS

1.62ctw Yellow Citrine, Square, VS

6 x 6 mm (calibrated)

$ 8.87

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2.16ct Orange Hessonite Garnet, Oval, VS

2.16ct Orange Hessonite Garnet, Oval, VS

8.6 x 7 mm

$ 43.03

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1.02ct Orange Hessonite Garnet, Round, VVS-VS

1.02ct Orange Hessonite Garnet, Round, VVS-VS

6 mm (calibrated)

$ 15.59

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3.04ct Red Almandine Garnet, Pear Shape, VVS-VS

3.04ct Red Almandine Garnet, Pear Shape, VVS-VS

12 x 8 mm (calibrated)

$ 25.23

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1.04ct Yellow Beryl, Round, VVS

1.04ct Yellow Beryl, Round, VVS

7 mm (calibrated)

$ 20.72

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0.74ct Green Tourmaline, Emerald Cut, VVS

0.74ct Green Tourmaline, Emerald Cut, VVS

6.8 x 4.2 mm

$ 36.85

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12.53ctw Brown Tiger'S Eye, Baguette, Opaque

12.53ctw Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 13.73

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1.52ct Green Tourmaline, Emerald Cut, VS-SI

1.52ct Green Tourmaline, Emerald Cut, VS-SI

14.8 x 3.4 mm

$ 39.97

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38.37ct Gray Hematite, Oval, Opaque

38.37ct Gray Hematite, Oval, Opaque

23.3 x 18.1 mm

$ 37.42

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42.28ct Multicolor Ruby-Zoisite, Oval, Opaque

42.28ct Multicolor Ruby-Zoisite, Oval, Opaque

29.6 x 21.1 mm

$ 69.48

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1.78ctw Orange Moonstone, Cushion, Translucent

1.78ctw Orange Moonstone, Cushion, Translucent

6 x 6 mm (calibrated)

$ 3.54

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30.93ctw Yellow Rutile Quartz, Sphere / Ball, Transparent

30.93ctw Yellow Rutile Quartz, Sphere / Ball, Transparent

9 mm (calibrated)

$ 33.88

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2.86ct Violet Amethyst, Trillion, VVS-VS

2.86ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.94

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13.01ct Multicolor Ruby-Zoisite, Baguette, Opaque

13.01ct Multicolor Ruby-Zoisite, Baguette, Opaque

17.1 x 12 mm

$ 35.62

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2.08ct Red Almandine Garnet, Baguette, VVS

2.08ct Red Almandine Garnet, Baguette, VVS

10 x 5 mm

$ 17.26

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34.11ct Gray Hematite, Oval, Opaque

34.11ct Gray Hematite, Oval, Opaque

22.9 x 17.8 mm

$ 33.27

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4.31ctw Orange Zircon, Round, VVS-VS
Zircon Product Video (481453)

4.31ctw Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 102.80

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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

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate
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