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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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6.29ctw Yellow Citrine, Oval, VS

11 x 9 mm (calibrated)

$ 39.28

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4.01ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 21.97

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7.67ct Multicolor Tiger'S Eye Matrix, Sphere / Ball, Opaque

11 mm (calibrated)

$ 3.85

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12.69ct White Rainbow Moonstone, Pear Shape, Translucent

19.4 x 14.2 mm

$ 88.48

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4.17ct Brown Mother Of Pearl, Fancy, Opaque

19.3 x 12.4 mm

$ 9.60

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3.26ctw Red Pyrope Garnet, Marquise, VS

11.9 x 5.9 mm

$ 28.58

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8.82ct Green Amazonite, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 8.96

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1.89ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.49

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2.92ct Violet Amethyst, Trillion, VVS

10 x 10 mm (calibrated)

$ 20.36

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3.12ctw Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 21.67

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2.67ct Pink Tourmaline, Emerald Cut, SI

8.2 x 7.3 mm

$ 201.84

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21.52ctw Multicolor Fossil Coral, Oval, Opaque

18.4 x 12.2 mm

$ 27.82

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4.93ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 32.41

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1.82ct Orange Hessonite Garnet, Cushion, VS-SI

9 x 7 mm (calibrated)

$ 39.88

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3.93ct Yellow Apatite, Heart, VS

11.4 x 10.3 mm

$ 179.55

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1.40ct Green Apatite, Pear Shape, VS

9 x 6 mm (calibrated)

$ 65.93

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0.87ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 6.67

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7.57ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 41.48

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6.06ct Turquoise Hemimorphite Druzy, Fancy, Opaque

16.6 x 8.9 mm

$ 99.59

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4.09ct Yellow Citrine, Emerald Cut, VVS

11 x 9 mm (calibrated)

$ 31.37

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6.20ct White Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 15.55

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26.55ctw Red Ruby-Zoisite, Flower Cut, Opaque

16 x 16 mm (calibrated)

$ 31.71

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3.44ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 21.60

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0.82ctw White Rainbow Moonstone, Marquise, Transparent

6 x 4 mm (calibrated)

$ 26.96

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 -> 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

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate
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