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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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3.16ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 23.70

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0.98ct Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 7.52

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9.26ct Multicolor Boulder Opal, Fancy, Opaque

21.4 x 15.4 mm

$ 64.56

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2.74ct White Moonstone, Oval, Transparent

10 x 8 mm (calibrated)

$ 24.01

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9.03ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 19.97

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1.70ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 3.39

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2.01ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 17.62

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3.93ct Pink Strawberry Quartz, Oval, Translucent

10 x 8 mm (calibrated)

$ 30.14

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2.43ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 39.94

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2.10ctw White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.91

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1.20ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.6 mm

$ 131.47

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27.10ct Multicolor Jasper, Fancy, Opaque

35.8 x 10.1 mm

$ 8.10

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4.57ct Multicolor Boulder Opal, Cushion, Opaque

18.9 x 9.1 mm

$ 18.97

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2.25ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 19.72

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6.34ctw Multicolor Pietersite, Round, Opaque

10 mm (calibrated)

$ 14.97

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0.51ct Blue Kyanite, Round, SI

4.5 mm (calibrated)

$ 12.70

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8.87ctw Green Prehnite, Oval, Transparent

8.4 x 7.1 mm

$ 48.60

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2.38ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.26

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6.02ct Green Prehnite, Fancy, Translucent

13.4 x 9.6 mm

$ 9.89

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1.61ct Green Tourmaline, Emerald Cut, VVS-VS

16.9 x 3.5 mm

$ 38.80

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2.10ct White Rainbow Moonstone, Oval, Transparent

9 x 7 mm (calibrated)

$ 35.75

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6.10ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 6.08

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0.92ct Green Peridot, Pear Shape, VS

7.5 x 5.8 mm

$ 8.07

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1.84ct Pink Tourmaline, Emerald Cut, VVS-VS

8.7 x 5.2 mm

$ 133.05

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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

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 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

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

I loved it! Extensive inventory, great prices, I definitely will be buying from here again!

Posted By Lex in April, 2026
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
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