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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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1.06ct Multicolor Tourmaline, Emerald Cut, VS
Tourmaline Product Video (744041)

1.06ct Multicolor Tourmaline, Emerald Cut, VS

8.3 x 4.1 mm

$ 237.55

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37.57ct Green Jadeite, Fancy, Translucent

37.57ct Green Jadeite, Fancy, Translucent

41.6 x 16.4 mm

$ 30.87

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4.93ctw Yellow Citrine, Oval, VVS

4.93ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 27.01

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5.06ct Brown Smoky Quartz, Round, Transparent

5.06ct Brown Smoky Quartz, Round, Transparent

12 mm (calibrated)

$ 21.23

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1.22ct Green Tourmaline, Emerald Cut, SI

1.22ct Green Tourmaline, Emerald Cut, SI

6.4 x 5.2 mm

$ 60.76

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1.81ctw Multicolor Opal, Oval, Transparent

1.81ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 79.32

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6.87ct Multicolor Coral, Pear Shape, Translucent

6.87ct Multicolor Coral, Pear Shape, Translucent

14.8 x 12.1 mm

$ 21.46

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3.46ctw Orange Sunstone, Oval, Translucent

3.46ctw Orange Sunstone, Oval, Translucent

7 x 5 mm (calibrated)

$ 19.83

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0.90ct Green Chrome Diopside, Oval, VS

0.90ct Green Chrome Diopside, Oval, VS

7 x 5 mm (calibrated)

$ 22.41

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2.28ct Orange Moonstone, Square, Translucent

2.28ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.57

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20.17ct Violet Amethyst, Cushion, VVS

20.17ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 140.63

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1.64ct Brown Tourmaline, Oval, Transparent

1.64ct Brown Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 32.67

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0.79ct Green Peridot, Oval, VS

0.79ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.51

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27.92ct Black Tourmaline, Emerald Cut, Opaque

27.92ct Black Tourmaline, Emerald Cut, Opaque

45.7 x 8.9 mm

$ 139.04

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0.94ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.94ct Yellow Color-Change Diaspore, Emerald Cut, VS

5.9 x 4.8 mm

$ 31.74

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25.64ct Green Jadeite, Oval, Translucent

25.64ct Green Jadeite, Oval, Translucent

22.8 x 17.1 mm

$ 42.14

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17.21ct Multicolor Jasper, Oval, Opaque

17.21ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 18.86

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4.64ct Yellow Citrine, Briolette, VVS

4.64ct Yellow Citrine, Briolette, VVS

13.7 x 8.1 mm

$ 25.98

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14.14ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

14.14ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

14 x 14 mm (calibrated)

$ 17.18

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4.19ct Green Prehnite, Fancy, Transparent

4.19ct Green Prehnite, Fancy, Transparent

14.2 x 9.6 mm

$ 6.79

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20.92ct Green Jadeite, Oval, Translucent

20.92ct Green Jadeite, Oval, Translucent

24 x 17 mm

$ 57.30

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14.97ct Gray Hematite, Marquise, Opaque

14.97ct Gray Hematite, Marquise, Opaque

23.8 x 11.8 mm

$ 15.09

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1.23ct Orange Zircon, Round, VVS-VS

1.23ct Orange Zircon, Round, VVS-VS

6 mm (calibrated)

$ 29.35

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1.76ct Orange Sunstone, Oval, Translucent

1.76ct Orange Sunstone, Oval, Translucent

8.9 x 7.3 mm

$ 10.52

View Gem
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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

Very pleasant

Posted By Varun in June, 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 love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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