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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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Yellow Untreated Gemstones
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4.92ctw Orange Sunstone, Round, Translucent

9 mm (calibrated)

$ 29.12

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7.06ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 54.14

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1.00ct Yellow Color-Change Diaspore, Pear Shape, VS

10.9 x 4.2 mm

$ 35.06

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0.68ct Green Sphene, Oval, Transparent

5.7 x 4.9 mm

$ 3.39

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0.48ct Blue Kyanite, Round, VS-SI

4.3 mm

$ 11.95

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8.64ctw Multicolor Pietersite, Pear Shape, Opaque

19.1 x 12.3 mm

$ 20.22

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30.95ct White Dendritic Agate, Fancy, Opaque

27.9 x 16 mm

$ 21.58

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1.57ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 30.97

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1.67ct Red Almandine Garnet, Baguette, VVS

10 x 5 mm

$ 62.37

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28.40ct Black Snowflake Obsidian, Baguette, Opaque

25.5 x 17 mm

$ 18.67

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4.10ctw Violet Amethyst, Oval, VS

6 x 4 mm (calibrated)

$ 26.95

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3.72ctw Orange Hessonite Garnet, Square, VS-SI

7 x 7 mm (calibrated)

$ 81.51

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1.49ctw Orange Fire Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 32.65

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5.55ctw Orange Sunstone, Oval, Translucent

10 x 8 mm (calibrated)

$ 42.57

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5.11ct Multicolor Opal, Oval, Translucent

14 x 10 mm (calibrated)

$ 127.24

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1.53ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 12.19

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2.81ctw Violet Amethyst, Trillion, VS

7 x 6.2 mm

$ 18.48

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0.17ctw White Diamond, Round, VVS-VS

2.8 mm (calibrated)

$ 303.91

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1.65ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 12.66

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1.02ct White Rainbow Moonstone, Oval, Transparent

7.1 x 6 mm

$ 18.17

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1.66ct Orange Hessonite Garnet, Oval, VS

7.9 x 6.4 mm

$ 27.28

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5.50ct White Topaz, Round, VVS

10 mm (calibrated)

$ 30.13

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2.01ct Green Peridot, Cushion, VS

7.9 x 7.2 mm

$ 78.84

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5.27ctw White Topaz, Cushion, VVS-VS

4.7 x 4.6 mm

$ 28.88

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 -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very food

Posted By Keeto in July, 2025
Source: Bizrate
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