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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 Price
Untreated Gemstones Treatment

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5.69ct Brown Smoky Quartz, Round, VVS

5.69ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 9.35

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22.53ct Pink Rose Quartz, Oval, Transparent

22.53ct Pink Rose Quartz, Oval, Transparent

20.2 x 16.8 mm

$ 49.37

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1.72ct Purple Tourmaline, Round, Transparent

1.72ct Purple Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 26.24

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37.58ct Black Tourmaline, Emerald Cut, Opaque

37.58ct Black Tourmaline, Emerald Cut, Opaque

26.2 x 15 mm

$ 187.15

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0.84ct Brown Tourmaline, Oval, Transparent

0.84ct Brown Tourmaline, Oval, Transparent

6.2 x 5.1 mm

$ 13.93

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13.81ct Green Tourmaline, Flower Cut, Translucent
Tourmaline Product Video (472838)

13.81ct Green Tourmaline, Flower Cut, Translucent

25 x 18 mm (calibrated)

$ 151.30

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30.85ctw Brown Rutile Quartz, Sphere / Ball, Transparent

30.85ctw Brown Rutile Quartz, Sphere / Ball, Transparent

13 mm (calibrated)

$ 33.81

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11.86ct Turquoise Larimar, Oval, Opaque

11.86ct Turquoise Larimar, Oval, Opaque

18 x 13 mm (calibrated)

$ 141.59

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15.66ct Green Opal, Oval, Opaque

15.66ct Green Opal, Oval, Opaque

20 x 15 mm (calibrated)

$ 33.53

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17.98ct Pink Rose Quartz, Oval, Transparent

17.98ct Pink Rose Quartz, Oval, Transparent

17.6 x 14.9 mm

$ 29.55

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91.29ct Multicolor Jasper, Oval, Opaque

91.29ct Multicolor Jasper, Oval, Opaque

37.1 x 28.9 mm

$ 47.01

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0.62ct Orange Zircon, Oval, VVS

0.62ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 9.26

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2.79ctw Pink Strawberry Quartz, Oval, Translucent

2.79ctw Pink Strawberry Quartz, Oval, Translucent

8 x 6 mm (calibrated)

$ 17.06

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6.51ct Multicolor Ruby In Fuchsite, Marquise, Translucent

6.51ct Multicolor Ruby In Fuchsite, Marquise, Translucent

20.5 x 10.4 mm

$ 48.65

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48.89ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

48.89ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

34.4 x 27.3 mm

$ 21.91

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3.50ct Yellow Citrine, Emerald Cut, VVS

3.50ct Yellow Citrine, Emerald Cut, VVS

12 x 8 mm (calibrated)

$ 24.40

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3.17ct Green Malachite, Oval, Opaque

3.17ct Green Malachite, Oval, Opaque

10 x 8 mm (calibrated)

$ 3.15

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3.85ctw Purple Rhodolite Garnet, Oval, VS

3.85ctw Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 84.36

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9.86ct Brown Tiger'S Eye, Oval, Opaque

9.86ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 5.79

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2.08ct Yellow Golden Beryl, Oval, VVS

2.08ct Yellow Golden Beryl, Oval, VVS

10 x 8 mm (calibrated)

$ 56.97

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13.52ctw Multicolor Labradorite, Pear Shape, Translucent

13.52ctw Multicolor Labradorite, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 29.62

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0.78ct Yellow Color-Change Diaspore, Cushion, VS

0.78ct Yellow Color-Change Diaspore, Cushion, VS

6.2 x 5 mm

$ 29.91

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2.88ct Orange Sunstone, Round, Translucent

2.88ct Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 17.04

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26.33ct Brown Moonstone, Oval, Opaque

26.33ct Brown Moonstone, Oval, Opaque

22.2 x 16 mm

$ 57.70

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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

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
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

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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