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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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9.71ct Green Prehnite, Fancy, Transparent

19.6 x 13.3 mm

$ 13.50

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1.95ctw White Sillimanite Cat'S Eye, Oval, Translucent

6.7 x 4.2 mm

$ 7.74

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1.44ct Yellow Citrine, Square, VS

7 x 7 mm (calibrated)

$ 9.46

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9.36ctw Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 51.28

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19.29ct Violet Amethyst, Cushion, VVS-VS

20 x 15 mm (calibrated)

$ 134.49

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1.80ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 13.80

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1.86ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 33.87

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9.96ct White Rainbow Moonstone, Pear Shape, Transparent

19.6 x 13.3 mm

$ 148.80

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39.08ct Pink Rose Quartz, Oval, Transparent/Translucent

23 x 19 mm

$ 55.66

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6.33ct Pink Morganite, Oval, Transparent

12 x 10 mm (calibrated)

$ 63.05

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4.86ct Pink Morganite, Oval, Transparent

13.1 x 10 mm

$ 48.41

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3.37ctw White Rainbow Moonstone, Square, Transparent/Translucent

3 x 3 mm (calibrated)

$ 96.00

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19.45ctw Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 43.01

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27.55ct Blue Turquoise, Oval, Opaque

24.4 x 16.2 mm

$ 82.32

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2.98ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 20.77

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0.36ct Yellow Citrine, Trillion, VS

5 x 5 mm (calibrated)

$ 2.99

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3.14ctw Multicolor Labradorite, Round, Transparent

7 mm (calibrated)

$ 6.36

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5.88ct Green Actinolite Cat'S Eye, Oval, Translucent

14.2 x 10.5 mm

$ 40.99

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48.56ctw Multicolor Jasper, Fancy, Opaque

38 x 20.4 mm

$ 68.11

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32.98ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

34.2 x 18.8 mm

$ 32.85

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13.91ct Red Strawberry Quartz, Oval, Translucent

16.2 x 13.8 mm

$ 106.68

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11.84ct Multicolor Labradorite, Oval, Translucent

18 x 13 mm (calibrated)

$ 25.95

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1.93ct Green Tourmaline, Emerald Cut, VVS-VS

17.9 x 3.8 mm

$ 40.39

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0.75ct Orange Clinohumite, Pear Shape, SI

7.1 x 4.6 mm

$ 31.13

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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

love the site, the experience and the products.

Posted By Ckingpots in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
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

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate
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