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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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3.46ct Yellow Citrine, Emerald Cut, VVS

3.46ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 26.54

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29.17ct Green Amazonite, Fancy, Opaque

29.17ct Green Amazonite, Fancy, Opaque

38.6 x 10.4 mm

$ 8.72

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2.17ctw Green Demantoid Garnet, Oval, VS-SI

2.17ctw Green Demantoid Garnet, Oval, VS-SI

5.9 x 4.2 mm

$ 237.75

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1.69ct Pink Strawberry Quartz, Oval, Translucent

1.69ct Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 8.45

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5.88ct Multicolor Agate, Oval, Opaque

5.88ct Multicolor Agate, Oval, Opaque

12 x 10 mm (calibrated)

$ 9.96

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2.07ctw White Sillimanite Cat'S Eye, Oval, Transparent

2.07ctw White Sillimanite Cat'S Eye, Oval, Transparent

7.4 x 5 mm

$ 6.81

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2.02ct Green Tourmaline, Cushion, VVS-VS

2.02ct Green Tourmaline, Cushion, VVS-VS

8.1 x 6.8 mm

$ 234.72

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8.10ct Brown Smoky Quartz, Emerald Cut, VS

8.10ct Brown Smoky Quartz, Emerald Cut, VS

12 x 12 mm (calibrated)

$ 44.37

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3.48ct Pink Strawberry Quartz, Oval, Transparent

3.48ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 21.75

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0.92ct Green Tourmaline, Oval, Transparent

0.92ct Green Tourmaline, Oval, Transparent

6.6 x 4.9 mm

$ 15.25

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4.95ctw Multicolor Labradorite, Round, Translucent

4.95ctw Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 10.65

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19.09ct Multicolor Agate, Oval, Opaque

19.09ct Multicolor Agate, Oval, Opaque

18.1 x 15.6 mm

$ 15.21

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3.56ct Violet Amethyst, Oval, Transparent/Translucent

3.56ct Violet Amethyst, Oval, Transparent/Translucent

11 x 9 mm (calibrated)

$ 27.30

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0.09ct Black Diamond, Round, Opaque

0.09ct Black Diamond, Round, Opaque

2.7 mm (calibrated)

$ 30.81

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1.84ct Yellow Citrine, Pear Shape, VS

1.84ct Yellow Citrine, Pear Shape, VS

9 x 7 mm (calibrated)

$ 14.11

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11.71ctw Multicolor Pietersite, Round, Opaque

11.71ctw Multicolor Pietersite, Round, Opaque

14 mm (calibrated)

$ 51.70

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1.26ct Yellow Morganite, Oval, VS

1.26ct Yellow Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 49.59

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5.55ct Yellow Citrine, Oval, VVS-VS

5.55ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 33.32

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7.24ct Pink Morganite, Round, Translucent

7.24ct Pink Morganite, Round, Translucent

12 mm (calibrated)

$ 78.53

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2.35ct Black Cat'S Eye Scapolite, Oval, Translucent

2.35ct Black Cat'S Eye Scapolite, Oval, Translucent

8.4 x 6.9 mm

$ 12.88

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1.30ct Green Peridot, Oval, VS

1.30ct Green Peridot, Oval, VS

7.3 x 6 mm

$ 14.24

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6.34ct Multicolor Fire Agate, Fancy, Opaque

6.34ct Multicolor Fire Agate, Fancy, Opaque

13 x 10.2 mm

$ 48.75

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1.44ct Green Tourmaline, Emerald Cut, VS-SI

1.44ct Green Tourmaline, Emerald Cut, VS-SI

23.7 x 2.9 mm

$ 37.86

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8.73ctw Multicolor Pietersite, Baguette, Opaque

8.73ctw Multicolor Pietersite, Baguette, Opaque

15.4 x 8.7 mm

$ 21.40

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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

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 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 -> 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 -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
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
→ View All GemSelect Reviews on Bizrate
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