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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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1.68ct Orange Zircon, Round, VVS-VS

1.68ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 36.81

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11.90ct Multicolor Coral, Pear Shape, Opaque

11.90ct Multicolor Coral, Pear Shape, Opaque

19 x 14.7 mm

$ 37.16

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0.62ct Green Tourmaline, Round, Transparent

0.62ct Green Tourmaline, Round, Transparent

4.7 mm

$ 12.35

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1.42ct Pink Tourmaline, Emerald Cut, VS

1.42ct Pink Tourmaline, Emerald Cut, VS

9.2 x 5.1 mm

$ 165.00

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1.63ct Orange Moonstone, Trillion, Translucent

1.63ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 3.25

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12.09ctw Black Star Diopside, Oval, Opaque

12.09ctw Black Star Diopside, Oval, Opaque

12.3 x 9.1 mm

$ 50.17

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4.06ct Yellow Rutile Quartz, Oval, Transparent

4.06ct Yellow Rutile Quartz, Oval, Transparent

13 x 9 mm (calibrated)

$ 11.12

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1.57ctw Red Pyrope Garnet, Square, VVS-VS

1.57ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 12.04

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1.17ct Orange Clinohumite, Oval, SI

1.17ct Orange Clinohumite, Oval, SI

8 x 6 mm (calibrated)

$ 58.27

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2.36ct Green Tourmaline, Emerald Cut, VVS-VS

2.36ct Green Tourmaline, Emerald Cut, VVS-VS

19.2 x 3.8 mm

$ 64.64

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1.62ct Yellow Sphene, Oval, Transparent

1.62ct Yellow Sphene, Oval, Transparent

6.8 x 6.3 mm

$ 8.07

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3.12ct Orange Sunstone, Oval, Translucent

3.12ct Orange Sunstone, Oval, Translucent

11 x 9 mm (calibrated)

$ 47.86

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15.17ct Brown Tiger'S Eye, Oval, Opaque

15.17ct Brown Tiger'S Eye, Oval, Opaque

21.3 x 15.5 mm

$ 11.79

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5.77ct Brown Rutile Quartz, Round, Translucent

5.77ct Brown Rutile Quartz, Round, Translucent

12 mm (calibrated)

$ 14.48

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1.71ct Multicolor Opal, Oval, Transparent

1.71ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 42.58

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3.66ct Yellow Citrine, Oval, VVS-VS

3.66ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 20.05

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6.86ct Multicolor Rainbow Pyrite, Fancy, Opaque

6.86ct Multicolor Rainbow Pyrite, Fancy, Opaque

17.5 x 13.8 mm

$ 17.77

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19.41ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

19.41ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

26.4 x 14.9 mm

$ 19.33

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5.12ct Multicolor Fire Agate, Fancy, Opaque

5.12ct Multicolor Fire Agate, Fancy, Opaque

13.9 x 10 mm

$ 39.38

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1.30ct Pink Tourmaline, Oval, Transparent

1.30ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 21.55

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38.31ctw Multicolor Agate, Round, Opaque

38.31ctw Multicolor Agate, Round, Opaque

16 mm (calibrated)

$ 38.16

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4.10ct Yellow Citrine, Oval, VVS-VS

4.10ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 31.44

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3.38ct Yellow Citrine, Oval, VS

3.38ct Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 25.93

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21.46ct Multicolor Boulder Opal, Pear Shape, Opaque

21.46ct Multicolor Boulder Opal, Pear Shape, Opaque

28.9 x 18.8 mm

$ 164.58

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 -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 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

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

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