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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
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Yellow Untreated Gemstones
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1.93ct Yellow Sphene, Pear Shape, VS

9.4 x 6.8 mm

$ 159.05

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9.32ct Pink Morganite, Pear Shape, Transparent

20.6 x 11 mm

$ 102.11

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1.88ct Pink Strawberry Quartz, Oval, Translucent

9 x 7 mm (calibrated)

$ 14.43

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6.03ct Black Tourmaline, Heart, Opaque

11 x 11 mm (calibrated)

$ 79.83

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1.18ct Green Tsavorite Garnet, Oval, SI

6.5 x 5.5 mm

$ 646.40

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3000.00ct Green Malachite, Oval, Opaque

139.4 x 82.7 mm

$ 1,220.10

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12.53ct Brown Tiger'S Eye, Sphere / Ball, Opaque

12 mm (calibrated)

$ 12.58

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14.16ct Turquoise Larimar, Oval, Opaque

20 x 15 mm (calibrated)

$ 169.06

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1.09ct Green Tsavorite Garnet, Pear Shape, VS-SI

7.8 x 5.4 mm

$ 716.52

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1.53ct Purple Spinel, Cushion, VS

6.7 x 5.3 mm

$ 117.34

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9.91ctw White Quartz Cat'S Eye, Round, Transparent

10 mm (calibrated)

$ 35.29

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143.91ct Multicolor Rhodochrosite, Fancy, Opaque

43.7 x 25.5 mm

$ 132.70

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0.23ct Yellow Diamond, Round, VS

4 mm (calibrated)

$ 419.90

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57.58ct Multicolor Jasper, Oval, Opaque

44.5 x 28.7 mm

$ 48.57

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7.84ct Yellow Citrine, Pear Shape, VVS

14.1 x 12.9 mm

$ 50.11

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1.71ct Yellow Sillimanite Cat'S Eye, Oval, Transparent

7.3 x 5.3 mm

$ 5.62

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20.24ct Yellow Quartz Cat'S Eye, Oval, Translucent

15 x 15 mm (calibrated)

$ 412.65

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2.36ctw Pink Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 129.28

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5.13ct Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 20.68

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28.68ct Orange Moonstone, Round, Translucent

19 mm (calibrated)

$ 47.85

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75.10ct Multicolor Quartz With Marcasite, Round, Transparent

22.5 mm

$ 411.40

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12.63ct Green Druzy Variscite, Fancy, Opaque

25.5 x 14.5 mm

$ 19.24

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5.89ct Brown Cat'S Eye Opal, Oval, Translucent

13.7 x 10.5 mm

$ 32.27

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1.10ct Green Tsavorite Garnet, Heart, VS-SI

6.7 x 5.8 mm

$ 602.58

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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

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate
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