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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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5.36ct Brown Smoky Quartz, Pear Shape, VVS

14.9 x 0.9 mm

$ 10.67

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9.58ct Pink Rose Quartz, Pear Shape, Transparent

22 x 14.1 mm

$ 33.37

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71.50ct Brown Tiger'S Eye, Square, Opaque

26.4 x 26.2 mm

$ 41.54

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3.87ctw White Topaz, Square, VVS-VS

4 x 4 mm (calibrated)

$ 29.68

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2.50ct Yellow Citrine, Baguette, VS

12 x 6.2 mm

$ 19.17

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1.02ct Yellow Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 55.88

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6.74ct Brown Smoky Quartz, Oval, VVS

14 x 12 mm (calibrated)

$ 23.56

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5.75ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 31.51

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3.54ct Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 21.33

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4.03ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 28.10

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1.03ctw Violet Amethyst, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 6.84

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1.89ct Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 18.71

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2.13ct Orange Sunstone, Round, Transparent

9 mm (calibrated)

$ 12.74

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2.83ctw Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 44.27

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3.00ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 16.43

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1.78ct Yellow Tourmaline, Cushion, VS-SI

6.9 x 6.5 mm

$ 206.84

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1.57ct Orange Hessonite Garnet, Oval, VS-SI

7.8 x 6.4 mm

$ 31.27

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2.82ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 21.62

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4.74ctw Red Rhodolite Garnet, Oval, VS

5.1 x 4.1 mm

$ 41.54

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12.60ctw Green Amazonite, Round, Opaque

9 mm (calibrated)

$ 10.04

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3.83ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6 mm

$ 29.37

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14.18ct Violet Amethyst, Round, VVS-VS

16 mm (calibrated)

$ 98.86

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1.05ct Brown Color-Change Garnet, Oval, VVS

6.4 x 5.1 mm

$ 83.88

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3.55ct Green Prehnite, Oval, Transparent

10 x 8 mm (calibrated)

$ 19.29

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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

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 -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate
Enlarged Gemstone Image