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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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1.79ct Blue Kyanite, Oval, SI

1.79ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 35.66

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66.20ct Orange Druzy Citrine, Oval, Opaque

66.20ct Orange Druzy Citrine, Oval, Opaque

39.1 x 26.3 mm

$ 54.78

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1.81ct Yellow Citrine, Heart, VVS

1.81ct Yellow Citrine, Heart, VVS

8 x 8 mm (calibrated)

$ 12.62

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40.94ct Green Amazonite, Oval, Opaque

40.94ct Green Amazonite, Oval, Opaque

35.4 x 16.9 mm

$ 32.62

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6.93ct White Rainbow Moonstone, Pear Shape, Translucent

6.93ct White Rainbow Moonstone, Pear Shape, Translucent

15.7 x 10.4 mm

$ 48.31

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10.02ct Multicolor Rainbow Pyrite, Heart, Opaque

10.02ct Multicolor Rainbow Pyrite, Heart, Opaque

17 x 17 mm (calibrated)

$ 25.95

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0.24ct Yellow Spessartite Garnet, Oval, VS-SI

0.24ct Yellow Spessartite Garnet, Oval, VS-SI

4 x 3.2 mm

$ 8.37

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1.20ct Pink Morganite, Pear Shape, VVS-VS

1.20ct Pink Morganite, Pear Shape, VVS-VS

9.8 x 6 mm

$ 92.03

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0.66ct Yellow Beryl, Pear Shape, VVS-VS

0.66ct Yellow Beryl, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 13.15

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1.36ct Purple Rhodolite Garnet, Oval, VS

1.36ct Purple Rhodolite Garnet, Oval, VS

7.1 x 5.9 mm

$ 41.38

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1.10ct Violet Spinel, Oval, VVS-VS

1.10ct Violet Spinel, Oval, VVS-VS

6.4 x 5.6 mm

$ 133.61

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2.29ct Pink Strawberry Quartz, Oval, Transparent

2.29ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 17.02

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10.19ct Violet Amethyst, Fancy, Transparent

10.19ct Violet Amethyst, Fancy, Transparent

15 x 13 mm

$ 66.98

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1.21ct Yellow Color-Change Diaspore, Cushion, VS

1.21ct Yellow Color-Change Diaspore, Cushion, VS

8.6 x 4.4 mm

$ 42.42

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0.56ct Orange Spessartite Garnet, Oval, VS-SI

0.56ct Orange Spessartite Garnet, Oval, VS-SI

5.6 x 3.9 mm

$ 17.29

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3.74ctw Multicolor Labradorite, Round, Translucent

3.74ctw Multicolor Labradorite, Round, Translucent

7.5 mm (calibrated)

$ 9.10

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2.13ct Purple Rhodolite Garnet, Oval, VVS-VS

2.13ct Purple Rhodolite Garnet, Oval, VVS-VS

8.3 x 6.8 mm

$ 84.86

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4.09ctw Green Peridot, Round, VS

4.09ctw Green Peridot, Round, VS

6 mm (calibrated)

$ 39.97

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1.62ct Pink Strawberry Quartz, Round, Transparent

1.62ct Pink Strawberry Quartz, Round, Transparent

8 mm (calibrated)

$ 12.42

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3.00ct Violet Amethyst, Trillion, VS

3.00ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 22.48

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5.15ct Black Tourmaline, Emerald Cut, Opaque

5.15ct Black Tourmaline, Emerald Cut, Opaque

14 x 6.9 mm

$ 25.65

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41.53ct Green Amazonite, Oval, Opaque

41.53ct Green Amazonite, Oval, Opaque

31.7 x 25.7 mm

$ 33.08

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4.50ct Brown Rutile Quartz, Round, Translucent

4.50ct Brown Rutile Quartz, Round, Translucent

11 mm (calibrated)

$ 11.30

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1.48ct Pink Strawberry Quartz, Round, Translucent

1.48ct Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 14.83

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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

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
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

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 -> 8 star ratings

It was fine

Posted By Na in April, 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

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate
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