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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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44.60ct Violet Amethyst, Oval, VVS

24.8 x 19.7 mm

$ 296.14

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1.94ct Orange Sphalerite, Round, I1

7 mm (calibrated)

$ 96.61

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34.44ct Multicolor Tiger'S Eye Matrix, Trillion, Opaque

36.2 x 25 mm

$ 16.29

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14.16ct Turquoise Larimar, Oval, Opaque

20 x 15 mm (calibrated)

$ 169.06

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96.70ct Multicolor Agate, Oval, Opaque

32.3 x 27.5 mm

$ 77.05

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16.64ctw Multicolor Fossil Coral, Cushion, Opaque

14.3 x 11 mm

$ 30.09

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18.78ct Pink Coral, Fancy, Opaque

18.1 x 16.9 mm

$ 329.21

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6.76ct Turquoise Larimar, Oval, Opaque

14 x 10 mm (calibrated)

$ 87.44

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10.70ct Brown Smoky Quartz, Marquise, Transparent

19.9 x 13.4 mm

$ 44.90

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1.88ct Pink Strawberry Quartz, Oval, Translucent

9 x 7 mm (calibrated)

$ 14.43

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21.49ct Turquoise Amazonite, Oval, Translucent

26.8 x 15.9 mm

$ 23.32

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0.99ct Green Tsavorite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 542.32

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21.85ct Multicolor Amethyst Geode Slice, Fancy, Transparent

24 x 21.7 mm

$ 23.29

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2.15ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 7 mm (calibrated)

$ 42.40

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3.26ct Yellow Cat'S Eye Opal, Oval, Opaque

11.6 x 6.8 mm

$ 9.74

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59.54ct White Scolecite, Pear Shape, Opaque

49.1 x 30 mm

$ 65.23

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41.62ct Multicolor Jasper, Pear Shape, Opaque

38.2 x 33.5 mm

$ 45.60

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25.47ctw Multicolor Pietersite, Pear Shape, Opaque

32.9 x 14.6 mm

$ 112.45

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3.10ct Brown Cat'S Eye Scapolite, Round, Translucent

9 mm (calibrated)

$ 16.98

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7.76ct Purple Kunzite, Pear Shape, VVS

13 x 10.7 mm

$ 213.55

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17.53ct Red Strawberry Quartz, Oval, Translucent

20 x 15 mm (calibrated)

$ 112.03

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1.69ctw Multicolor Andalusite, Oval, VS

5 x 3 mm (calibrated)

$ 90.28

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2.76ct Yellow Golden Beryl, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 75.60

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44.70ct Multicolor Rhodochrosite, Pear Shape, Translucent

33.5 x 21.7 mm

$ 34.28

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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

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
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Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
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Overall Rating -> 10 star ratings

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
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Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
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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
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