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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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0.53ctw White Diamond, Heart, VVS

2.9 x 2.6 mm

$ 2,159.34

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0.76ct Pink Morganite, Pear Shape, VS

9.8 x 4.7 mm

$ 66.62

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74.64ct Green Uvarovite Garnet Drusy, Fancy, Opaque

44.6 x 28.9 mm

$ 111.51

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0.49ct Green Peridot, Oval, VS

6 x 4 mm (calibrated)

$ 3.10

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1.77ct Brown Tiger'S Eye, Baguette, Opaque

8 x 6 mm (calibrated)

$ 1.47

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2.64ct Violet Amethyst, Round, VS

9 mm (calibrated)

$ 20.25

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3.12ctw Green Tsavorite Garnet, Marquise, VS

4.9 x 2.6 mm

$ 124.30

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12.57ct Violet Amethyst, Flower Cut, Translucent

21 x 14.5 mm

$ 37.56

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0.46ctw Brown Diamond, Round, VS

4 mm (calibrated)

$ 699.81

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1.84ct Orange Hessonite Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 36.65

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2.31ct Green Sphene, Oval, SI

9.1 x 6.7 mm

$ 253.08

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3.98ct Green Prehnite, Pear Shape, Transparent/Translucent

12.8 x 8.5 mm

$ 8.72

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2.35ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.36

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0.96ct Yellow Sphalerite, Oval, SI-I1

6 x 5 mm

$ 47.81

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22.95ct Green Amazonite, Fancy, Translucent

35.6 x 9 mm

$ 11.44

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5.35ct Orange Moonstone, Round, Translucent

10 mm (calibrated)

$ 8.92

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1.35ct Red Tourmaline, Round, Transparent

7 mm (calibrated)

$ 19.28

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25.46ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 202.87

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5.95ctw Red Almandine Garnet, Round, Transparent

3 mm (calibrated)

$ 32.60

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41.53ct Multicolor Agate Geode, Fancy, Opaque

28.2 x 27.4 mm

$ 41.37

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254.67ct Pink Star Rose Quartz, Oval, Transparent

38.4 x 32.2 mm

$ 317.06

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0.65ct Yellow Color-Change Diaspore, Pear Shape, VVS

9 x 4 mm

$ 22.79

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13.46ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 73.74

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17.71ctw Brown Tiger'S Eye, Cushion, Opaque

14 x 12 mm (calibrated)

$ 16.17

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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

Very good place to buy gemstones

Posted By Elansary in March, 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

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate
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