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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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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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0.71ct Orange Tourmaline, Round, Transparent

5 mm (calibrated)

$ 28.29

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3.65ct Green Chrysoprase, Pear Shape, Opaque

11.9 x 8.7 mm

$ 45.44

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3.33ctw White Rainbow Moonstone, Square, Transparent

3.2 x 3.1 mm

$ 62.02

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3.31ctw Red Spessartite Garnet, Round, VVS-VS

5 mm (calibrated)

$ 112.42

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4.09ct Yellow Cat'S Eye Apatite, Oval, Translucent

9.9 x 7.7 mm

$ 31.37

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1.93ct Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 11.54

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1.14ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 7.95

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26.13ctw Multicolor Fossil Coral, Oval, Opaque

21.7 x 13.2 mm

$ 33.77

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1.36ct Orange Hessonite Garnet, Square, VS

5.9 x 5.7 mm

$ 22.81

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31.27ct Multicolor Jasper, Oval, Opaque

24.2 x 21 mm

$ 19.18

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0.71ct Pink Spinel, Cushion, VVS-VS

5.6 x 4.7 mm

$ 49.50

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5.06ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 21.23

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3.39ctw Red Pyrope Garnet, Marquise, VVS-VS

11.8 x 5.9 mm

$ 29.71

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1.02ct Yellow Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 44.70

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1.32ct Orange Hessonite Garnet, Oval, VVS-VS

7.6 x 6.3 mm

$ 24.98

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1.06ct Pink Spinel, Cushion, VS

6.9 x 5.3 mm

$ 175.96

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0.80ct Orange Zircon, Oval, VVS

6.1 x 4.2 mm

$ 11.95

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3.92ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 31.22

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8.47ct Green Prehnite, Fancy, Translucent

17.1 x 11.1 mm

$ 13.93

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1.08ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 8.61

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8.82ctw Orange Moonstone, Round, Translucent

11 mm (calibrated)

$ 17.66

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1.01ct Green Tourmaline, Baguette, VS

8.7 x 3.7 mm

$ 35.21

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1.67ct White Topaz, Marquise, VS

12.1 x 5 mm

$ 9.15

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2.15ct Black Cat'S Eye Scapolite, Oval, Translucent

8.8 x 6.5 mm

$ 11.79

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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 -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
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
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