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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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15.68ct Violet Amethyst, Oval, IF

20 x 15 mm (calibrated)

$ 104.12

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1.76ct Yellow Sphene, Oval, Transparent

7.3 x 6.5 mm

$ 9.64

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3.66ctw Yellow Citrine, Round, VS

8.5 mm (calibrated)

$ 24.30

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3.70ct Multicolor Boulder Opal, Fancy, Opaque

13.1 x 12.3 mm

$ 15.36

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25.08ctw Black Spinel, Baguette, Opaque

17.6 x 8.2 mm

$ 198.39

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0.68ct Pink Morganite, Pear Shape, VVS

8 x 5 mm (calibrated)

$ 40.98

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35.61ct Gray Hematite, Oval, Opaque

22.9 x 18.3 mm

$ 34.72

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7.55ctw Multicolor Pietersite, Round, Opaque

11 mm (calibrated)

$ 18.49

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1.54ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 36.74

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18.93ct Multicolor Pietersite, Pear Shape, Opaque

28.2 x 18.1 mm

$ 44.31

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19.50ct Multicolor Jasper, Fancy, Opaque

35.9 x 14.9 mm

$ 21.36

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13.62ct Pink Rose Quartz, Pear Shape, Transparent

24.1 x 14.2 mm

$ 47.45

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18.09ct Multicolor Jasper, Cushion, Opaque

28.1 x 13.2 mm

$ 19.82

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0.98ct Green Peridot, Emerald Cut, VVS-VS

6.6 x 5 mm

$ 14.64

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5.57ct Pink Kunzite, Pear Shape, VVS

13 x 9 mm (calibrated)

$ 153.28

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1.97ct White Topaz, Marquise, VVS

11.9 x 6 mm

$ 15.11

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1.17ct Yellow Citrine, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 8.74

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1.67ct Orange Sunstone, Oval, Translucent

9 x 7 mm (calibrated)

$ 9.98

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1.11ct Orange Moonstone, Pear Shape, Translucent

9 x 6 mm (calibrated)

$ 2.22

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2.37ct Green Peridot, Oval, VS

8.7 x 7.6 mm

$ 89.61

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13.89ct Pink Rose Quartz, Emerald Cut, Transparent

15 x 15 mm (calibrated)

$ 76.09

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0.84ct Pink Morganite, Pear Shape, VVS-VS

8.5 x 4.7 mm

$ 73.62

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0.83ct Pink Malaya Garnet, Round, VS

5.7 mm

$ 38.65

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11.68ct Black Tourmaline, Oval, Opaque

15.7 x 12.5 mm

$ 58.17

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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

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

The website was easy to use and there were a lot of good options, I was satisfied.

Posted By Brielly in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 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
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