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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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4.15ctw Red Pyrope Garnet, Marquise, VVS-VS

4.15ctw Red Pyrope Garnet, Marquise, VVS-VS

11.9 x 6.2 mm

$ 41.05

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5.68ctw Green Prehnite, Round, Transparent

5.68ctw Green Prehnite, Round, Transparent

8 mm (calibrated)

$ 30.87

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2.23ctw Yellow Beryl, Oval, VS

2.23ctw Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 44.42

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12.68ctw Multicolor Jasper, Pear Shape, Opaque

12.68ctw Multicolor Jasper, Pear Shape, Opaque

17.7 x 11.2 mm

$ 7.45

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104.56ct Violet Amethyst, Oval, VS
Amethyst Product Video (638838)

104.56ct Violet Amethyst, Oval, VS

34.6 x 26.3 mm

$ 728.99

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4.25ct Blue Kyanite, Oval, SI
Kyanite Product Video (680690)

4.25ct Blue Kyanite, Oval, SI

11.6 x 8.5 mm

$ 105.83

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2.39ctw Red Pyrope Garnet, Marquise, VVS-VS

2.39ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 20.95

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0.92ct Red Rhodolite Garnet, Emerald Cut, VVS-VS

0.92ct Red Rhodolite Garnet, Emerald Cut, VVS-VS

6 x 4.3 mm

$ 34.36

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25.76ct Violet Amethyst, Oval, VVS
Amethyst Product Video (509130)

25.76ct Violet Amethyst, Oval, VVS

20.7 x 16.4 mm

$ 197.56

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6.42ctw Multicolor Pietersite, Round, Opaque

6.42ctw Multicolor Pietersite, Round, Opaque

11 mm (calibrated)

$ 15.73

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0.71ct Multicolor Labradorite, Round, Translucent

0.71ct Multicolor Labradorite, Round, Translucent

5 mm (calibrated)

$ 1.73

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3.31ct Yellow Citrine, Oval, VS

3.31ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 23.07

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1.12ct Yellow Color-Change Diaspore, Emerald Cut, VS

1.12ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.9 x 5.5 mm

$ 58.61

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1.95ct Red Almandine Garnet, Oval, VVS-VS

1.95ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 72.83

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0.88ct Yellow Color-Change Diaspore, Emerald Cut, SI

0.88ct Yellow Color-Change Diaspore, Emerald Cut, SI

6.2 x 5 mm

$ 45.98

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39.47ct Violet Charoite, Baguette, Opaque

39.47ct Violet Charoite, Baguette, Opaque

32.2 x 19.8 mm

$ 64.86

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5.55ctw Yellow Citrine, Oval, VVS-VS

5.55ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 30.41

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1.33ct Orange Hessonite Garnet, Square, VS-SI

1.33ct Orange Hessonite Garnet, Square, VS-SI

6 x 6 mm (calibrated)

$ 22.31

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3.03ct Violet Amethyst, Trillion, VVS-VS

3.03ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 21.12

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7.02ctw Black Spinel, Round, Opaque

7.02ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 30.77

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39.63ct Multicolor Coral, Pear Shape, Opaque
Coral Product Video (497604)

39.63ct Multicolor Coral, Pear Shape, Opaque

35 x 29.6 mm

$ 40.13

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0.97ct Pink Morganite, Pear Shape, VS

0.97ct Pink Morganite, Pear Shape, VS

9 x 5.2 mm

$ 74.39

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1.63ct Pink Morganite, Pear Shape, VS

1.63ct Pink Morganite, Pear Shape, VS

10.2 x 8.4 mm

$ 71.43

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1.21ct Multicolor Opal, Oval, Transparent

1.21ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 30.13

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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

Very good.

Posted By Tommy in December, 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 -> 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

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate
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