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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
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2.40ct Orange Hessonite Garnet, Cushion, SI

7 x 7 mm (calibrated)

$ 44.70

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4.27ct Turquoise Grandidierite, Pear Shape, Translucent

13 x 8.6 mm

$ 212.65

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6.04ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 47.19

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4.54ctw Red Pyrope Garnet, Square, VS

4.2 x 4.2 mm

$ 34.82

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3.83ct Green Apatite, Emerald Cut, VS

8.5 x 8.4 mm

$ 155.88

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0.89ct Purple Tourmaline, Oval, Transparent

6.5 x 5 mm

$ 15.26

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0.67ct Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 4.67

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102.56ct Multicolor Agate, Square, Opaque

29.1 x 28.4 mm

$ 35.76

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4.14ct Multicolor Pietersite, Pear Shape, Opaque

13.7 x 7.7 mm

$ 12.37

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1.01ct Green Sphene, Oval, Transparent

6.5 x 5.3 mm

$ 5.03

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1.05ct Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 17.79

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2.83ct Multicolor Labradorite, Marquise, Translucent

14.3 x 7.4 mm

$ 6.26

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25.59ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

25 x 17.4 mm

$ 25.49

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0.97ctw Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 6.76

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1.63ctw Green Peridot, Marquise, VVS-VS

7 x 3.6 mm

$ 14.28

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1.44ct Pink Tourmaline, Oval, VVS-VS

7.1 x 6.3 mm

$ 220.87

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0.59ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 23.51

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22.81ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 49.98

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0.97ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.76

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2.38ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.74

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2.44ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5 mm

$ 21.38

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10.35ct Brown Tiger'S Eye, Oval, Opaque

18.4 x 13.6 mm

$ 6.08

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2.30ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.58

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7.12ct Purple Kunzite, Emerald Cut, VS

18.4 x 7 mm

$ 195.02

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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 was able to find what I've been looking for.

Posted By Tree Dog in April, 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

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 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

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate
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