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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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1.23ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 8.57

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1.61ct Blue Kyanite, Oval, VS-SI

8 x 6 mm (calibrated)

$ 38.79

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1.11ct Violet Amethyst, Square, VVS-VS

6 x 6 mm (calibrated)

$ 8.85

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4.33ctw Red Pyrope Garnet, Marquise, VVS-VS

12 x 6.1 mm

$ 47.58

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1.80ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 26.83

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11.84ct Brown Smoky Quartz, Round, VVS

16 mm (calibrated)

$ 19.46

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0.64ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 12.75

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2.55ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 13.98

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0.68ct Orange Sphalerite, Oval, VS-SI

5.2 x 4.6 mm

$ 33.86

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1.33ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 9.27

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2.33ct Orange Hessonite Garnet, Oval, VS-SI

8.7 x 7.3 mm

$ 34.74

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0.78ct Green Peridot, Emerald Cut, VVS

6.3 x 5.1 mm

$ 11.65

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8.38ctw Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 107.11

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6.53ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 35.77

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1.12ct Yellow Chrysoberyl, Oval, VVS-VS

6.8 x 5.6 mm

$ 130.59

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1.74ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.13

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1.77ctw Yellow Citrine, Marquise, VS

9.2 x 4.9 mm

$ 14.10

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5.30ct Multicolor Pietersite, Pear Shape, Opaque

16.7 x 10.5 mm

$ 12.51

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1.54ctw Red Pyrope Garnet, Square, VVS

5 x 5 mm (calibrated)

$ 11.81

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9.25ct Pink Rose Quartz, Emerald Cut, Transparent

12 x 12 mm (calibrated)

$ 50.68

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14.51ct Black Tourmaline, Emerald Cut, Opaque

18.8 x 10.7 mm

$ 72.26

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0.93ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 12.96

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6.17ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 23.05

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2.85ct Violet Amethyst, Trillion, VS

10.5 x 10 mm

$ 19.87

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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

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate
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