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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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4.82ct Turquoise Hemimorphite Druzy, Fancy, Opaque

13 x 9 mm (calibrated)

$ 72.01

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2.04ct Orange Hessonite Garnet, Emerald Cut, VS

6.9 x 6.7 mm

$ 40.23

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1.98ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 3.97

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7.47ct Brown Tiger'S Eye, Oval, Opaque

16.2 x 12.5 mm

$ 4.39

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29.90ct Orange Spessartite Garnet, Pear Shape, Translucent

26.7 x 11.5 mm

$ 744.51

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2.71ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 20.14

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11.53ctw Yellow Rutile Quartz, Round, Transparent

11 mm (calibrated)

$ 31.46

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9.03ct Green Opal, Pear Shape, Opaque

16.3 x 14.9 mm

$ 19.33

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2.59ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 51.59

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1.04ct Pink Tourmaline, Emerald Cut, VS

6.7 x 5.2 mm

$ 75.20

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3.24ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.10

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4.52ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 9.01

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1.57ct Green Tourmaline, Oval, Transparent

8.1 x 6.4 mm

$ 28.67

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5.78ct Pink Kunzite, Emerald Cut, VVS-VS

11.7 x 8.6 mm

$ 152.55

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20.20ctw Multicolor Jasper, Trillion, Opaque

21.3 x 16.5 mm

$ 11.87

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5.40ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 29.58

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23.91ct Yellow Obsidian, Oval, Opaque

27 x 20 mm (calibrated)

$ 19.06

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0.54ct Blue Kyanite, Round, SI

4.3 mm

$ 13.45

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1.86ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 203.78

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2.67ct Green Sphene, Oval, Translucent

10 x 7 mm (calibrated)

$ 13.30

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0.97ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 14.49

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0.76ct Green Tourmaline, Round, Transparent

5.5 mm (calibrated)

$ 13.03

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3.62ctw Red Pyrope Garnet, Marquise, VVS-VS

11.9 x 5.8 mm

$ 39.78

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5.20ct Multicolor Agate, Oval, Opaque

11 x 10 mm

$ 8.81

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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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 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

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate
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