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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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17.46ct Black Obsidian, Pear Shape, Opaque

17.46ct Black Obsidian, Pear Shape, Opaque

23.5 x 18.5 mm

$ 13.05

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1.19ct Green Sphene, Oval, VS-SI

1.19ct Green Sphene, Oval, VS-SI

6.8 x 5.9 mm

$ 71.71

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56.29ct Multicolor Jasper, Oval, Opaque

56.29ct Multicolor Jasper, Oval, Opaque

35.3 x 23.3 mm

$ 61.67

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4.76ct Pink Strawberry Quartz, Oval, Translucent

4.76ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 56.89

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0.59ct Green Tourmaline, Emerald Cut, VVS

0.59ct Green Tourmaline, Emerald Cut, VVS

7.3 x 3.5 mm

$ 14.69

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9.20ct White Rutile Quartz, Pear Shape, Transparent

9.20ct White Rutile Quartz, Pear Shape, Transparent

18.4 x 11.4 mm

$ 21.87

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0.21ct Green Kornerupine, Round, VVS-VS

0.21ct Green Kornerupine, Round, VVS-VS

3.5 mm (calibrated)

$ 8.76

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0.18ctw White Diamond, Round, VVS-VS

0.18ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 327.04

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14.53ct Bi-Color Ametrine, Cushion, VS
Ametrine Product Video (571541)

14.53ct Bi-Color Ametrine, Cushion, VS

20.9 x 11.2 mm

$ 95.52

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3.26ct Yellow Citrine, Oval, VVS-VS

3.26ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 21.43

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2.56ctw Green Tsavorite Garnet, Pear Shape, VS

2.56ctw Green Tsavorite Garnet, Pear Shape, VS

4.2 x 3.1 mm

$ 140.24

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8.91ctw Multicolor Pietersite, Oval, Opaque

8.91ctw Multicolor Pietersite, Oval, Opaque

14 x 10 mm (calibrated)

$ 39.04

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25.07ctw Black Spinel, Baguette, Opaque

25.07ctw Black Spinel, Baguette, Opaque

17.6 x 8.2 mm

$ 197.21

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2.83ct Orange Hessonite Garnet, Oval, VS-SI

2.83ct Orange Hessonite Garnet, Oval, VS-SI

7.9 x 782 mm

$ 45.41

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0.86ct Blue Kyanite, Oval, VS-SI

0.86ct Blue Kyanite, Oval, VS-SI

6.4 x 4.2 mm

$ 18.84

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2.20ctw Red Pyrope Garnet, Marquise, VVS-VS

2.20ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5.1 mm

$ 19.28

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1.82ct Purple Rhodolite Garnet, Oval, VS

1.82ct Purple Rhodolite Garnet, Oval, VS

7.4 x 6.6 mm

$ 74.65

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19.43ct Multicolor Fluorite, Pear Shape, SI
Fluorite Product Video (705200)

19.43ct Multicolor Fluorite, Pear Shape, SI

19.3 x 16.7 mm

$ 42.77

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3.06ct Yellow Citrine, Fancy, VVS-VS

3.06ct Yellow Citrine, Fancy, VVS-VS

8 x 6.7 mm

$ 23.46

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4.03ctw Green Prehnite, Oval, Transparent/Translucent

4.03ctw Green Prehnite, Oval, Transparent/Translucent

8.5 x 6.9 mm

$ 11.92

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4.59ct Violet Amethyst, Pear Shape, VVS

4.59ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 33.33

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6.12ct Brown Tiger'S Eye, Baguette, Opaque

6.12ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 6.09

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1.11ct Purple Rhodolite Garnet, Oval, VS

1.11ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 29.48

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0.78ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.78ct Yellow Color-Change Diaspore, Emerald Cut, VS

6.6 x 4.8 mm

$ 25.64

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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

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

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 -> 9 star ratings

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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