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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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1.24ct Pink Morganite, Pear Shape, VVS-VS

12.8 x 5.8 mm

$ 135.85

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34.42ct Purple Ruby-Zoisite, Fancy, Opaque

21.9 x 16 mm

$ 68.57

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1.47ct Black Star Diopside, Oval, Opaque

8 x 6 mm (calibrated)

$ 7.32

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0.95ct Orange Zircon, Oval, VS

6 x 4.9 mm

$ 14.19

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48.64ct Multicolor Jasper, Oval, Opaque

28.9 x 25.4 mm

$ 27.61

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9.58ct Multicolor Agate, Oval, Opaque

13 x 12.1 mm

$ 9.06

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5.33ct Brown Smoky Quartz, Emerald Cut, VVS-VS

13 x 10 mm

$ 23.36

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1.35ct Orange Hessonite Garnet, Oval, VS

8 x 6 mm (calibrated)

$ 20.63

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4.13ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 9.13

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6.36ct Yellow Moonstone, Oval, Translucent

14.6 x 8.1 mm

$ 13.73

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3.97ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 6.53

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4.26ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 32.67

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1.21ct Green Tourmaline, Emerald Cut, VVS-VS

7.6 x 4.7 mm

$ 60.26

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10.87ct Brown Star Sunstone, Oval, Opaque

16.1 x 12.8 mm

$ 90.22

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62.15ct Multicolor Jasper, Pear Shape, Opaque

48.4 x 29 mm

$ 38.13

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2.78ct Green Malachite, Oval, Opaque

9.3 x 6.6 mm

$ 2.77

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8.87ctw Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 44.17

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5.92ctw Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 8.13

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4.62ct Green Prehnite, Fancy, Translucent

15 x 10 mm (calibrated)

$ 7.59

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3.59ct Pink Morganite, Pear Shape, Transparent

14.2 x 8.2 mm

$ 14.90

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11.50ct Yellow Citrine, Oval, VVS

17.2 x 14.1 mm

$ 76.36

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0.82ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 22.46

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2.62ct Red Almandine Garnet, Pear Shape, VS

12 x 8 mm (calibrated)

$ 97.86

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16.86ct Gray Hematite, Pear Shape, Opaque

18.9 x 16.1 mm

$ 13.70

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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 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 -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Over pretty well experience the your website no complaints about it very easy reliable service provided

Posted By Blas in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate
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