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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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25.73ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

37 x 14 mm

$ 11.54

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23.02ct Multicolor Rainbow Pyrite, Fancy, Opaque

30.4 x 18 mm

$ 68.78

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14.73ct Brown Tiger'S Eye, Oval, Opaque

20 x 15 mm (calibrated)

$ 14.67

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2.85ct Green Tourmaline, Emerald Cut, VVS-VS

19.1 x 4.2 mm

$ 78.07

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0.86ct Violet Amethyst, Heart, Transparent

6 x 6 mm (calibrated)

$ 5.99

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1.30ct Orange Tourmaline, Pear Shape, VS

7 x 7 mm (calibrated)

$ 151.06

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2.97ctw Red Pyrope Garnet, Marquise, VVS

10.1 x 5.2 mm

$ 26.04

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1.68ct Brown Diamond, Emerald Cut, SI

7.5 x 5.6 mm

$ 2,853.82

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0.62ct Yellow Beryl, Pear Shape, VS

7.8 x 5 mm

$ 13.59

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3.49ct Yellow Zircon, Pear Shape, VVS-VS

10.7 x 7.1 mm

$ 202.77

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7.22ctw Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 110.75

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3.44ctw Yellow Citrine, Square, VVS-VS

7 x 7 mm (calibrated)

$ 26.39

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2.28ctw White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 74.96

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2.20ct Green Tourmaline, Emerald Cut, VS

22.1 x 3.6 mm

$ 60.26

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15.42ctw Multicolor Jasper, Pear Shape, Opaque

21.6 x 12.8 mm

$ 9.06

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4.81ct Violet Amethyst, Pear Shape, VS

14 x 10 mm (calibrated)

$ 34.94

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40.49ctw Gray Hematite, Emerald Cut, Opaque

20 x 15 mm (calibrated)

$ 35.90

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0.79ct Red Malaya Garnet, Cushion, VVS-VS

6 x 4 mm (calibrated)

$ 34.62

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7.20ctw Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 50.20

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0.75ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 18.68

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6.91ct Yellow Citrine, Briolette, VVS-VS

15.5 x 8.7 mm

$ 38.99

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2.47ct Pink Morganite, Marquise, Transparent

13.9 x 6.1 mm

$ 27.06

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0.71ct Pink Spinel, Cushion, VVS-VS

5.6 x 4.7 mm

$ 49.50

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1.09ct White Rainbow Moonstone, Oval, Transparent

8 x 6 mm (calibrated)

$ 18.56

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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

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate
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