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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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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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15.90ctw Multicolor Tourmaline, Fancy, Transparent
Tourmaline Product Video (737830)

15.90ctw Multicolor Tourmaline, Fancy, Transparent

16.8 x 16.4 mm

$ 395.91

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1.70ct Yellow Beryl, Oval, VVS-VS

1.70ct Yellow Beryl, Oval, VVS-VS

10 x 7.6 mm

$ 42.33

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7.65ct Brown Smoky Quartz, Emerald Cut, VVS

7.65ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 14.25

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0.90ct Green Tourmaline, Baguette, VVS-VS

0.90ct Green Tourmaline, Baguette, VVS-VS

8 x 4.2 mm

$ 31.37

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2.08ct Green Tourmaline, Emerald Cut, VVS

2.08ct Green Tourmaline, Emerald Cut, VVS

16.9 x 3.7 mm

$ 56.97

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43.27ct White Dendritic Agate, Cushion, Opaque

43.27ct White Dendritic Agate, Cushion, Opaque

28.9 x 26.6 mm

$ 30.17

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0.77ct Yellow Zircon, Oval, VVS-VS

0.77ct Yellow Zircon, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 19.17

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0.53ct Yellow Citrine, Cushion, VVS-VS

0.53ct Yellow Citrine, Cushion, VVS-VS

5.2 x 5.1 mm

$ 3.96

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15.95ct Purple Ruby-Zoisite, Flower Cut, Opaque

15.95ct Purple Ruby-Zoisite, Flower Cut, Opaque

14 x 12 mm (calibrated)

$ 19.38

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3.21ctw White Topaz, Cushion, VVS-VS

3.21ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 17.59

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5.50ct Pink Rose Quartz, Round, Transparent

5.50ct Pink Rose Quartz, Round, Transparent

12 mm (calibrated)

$ 21.88

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0.99ct Orange Zircon, Oval, VVS-VS

0.99ct Orange Zircon, Oval, VVS-VS

5.8 x 4.7 mm

$ 14.79

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0.73ct Green Tourmaline, Emerald Cut, VVS

0.73ct Green Tourmaline, Emerald Cut, VVS

7.7 x 3.6 mm

$ 36.35

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9.69ct Green Maw-Sit-Sit, Oval, Opaque

9.69ct Green Maw-Sit-Sit, Oval, Opaque

14 x 11.2 mm

$ 31.86

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10.12ct Multicolor Agate, Sphere / Ball, Opaque
Agate Product Video (701060)

10.12ct Multicolor Agate, Sphere / Ball, Opaque

11 mm (calibrated)

$ 8.07

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10.60ctw Green Prehnite, Fancy, Translucent

10.60ctw Green Prehnite, Fancy, Translucent

15.2 x 10.7 mm

$ 15.84

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0.84ct Yellow Morganite, Cushion, VS

0.84ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 50.61

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1.52ctw White Rainbow Moonstone, Pear Shape, Transparent

1.52ctw White Rainbow Moonstone, Pear Shape, Transparent

4.8 x 4.7 mm

$ 28.30

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1.48ct Orange Hessonite Garnet, Oval, VS-SI

1.48ct Orange Hessonite Garnet, Oval, VS-SI

7.4 x 6.1 mm

$ 29.48

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5.79ct Pink Strawberry Quartz, Oval, Translucent

5.79ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 34.90

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2.09ct Orange Pyrope Garnet, Fancy, Translucent

2.09ct Orange Pyrope Garnet, Fancy, Translucent

12 x 8 mm (calibrated)

$ 5.25

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8.53ct White Agate, Pear Shape, Opaque

8.53ct White Agate, Pear Shape, Opaque

15.5 x 11.4 mm

$ 13.50

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21.62ct White Aragonite, Square, Opaque

21.62ct White Aragonite, Square, Opaque

17 x 17 mm (calibrated)

$ 25.30

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4.05ct Yellow Citrine, Emerald Cut, VVS-VS

4.05ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 31.07

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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

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
Source: Bizrate
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