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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
Untreated Gemstones Size
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Yellow Untreated Gemstones
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1.11ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 22.11

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59.96ct Multicolor Jasper, Oval, Opaque

35.2 x 23.4 mm

$ 51.24

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24.39ct Multicolor Opal, Oval, Opaque

26.7 x 18.2 mm

$ 72.87

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2.94ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 19.32

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64.39ct Violet Charoite, Pear Shape, Opaque

56.6 x 25.6 mm

$ 120.63

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3.80ct Yellow Citrine, Baguette, VS

14.1 x 7 mm

$ 29.14

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7.19ct Violet Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 26.85

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13.53ct White Rainbow Moonstone, Oval, Translucent

19.1 x 12.6 mm

$ 13.48

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31.64ct Green Bloodstone, Pear Shape, Opaque

36.7 x 22.2 mm

$ 14.18

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3.06ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.77

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1.35ct Green Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 23.14

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0.31ct Violet Amethyst, Emerald Cut, VS

5 x 3 mm (calibrated)

$ 1.80

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0.57ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 22.71

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0.78ct Yellow Color-Change Diaspore, Square, VVS-VS

4.9 x 4.6 mm

$ 40.75

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2.21ct Orange Hessonite Garnet, Emerald Cut, SI

7.5 x 7.4 mm

$ 37.16

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1.57ct Green Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 26.35

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3.76ct Violet Amethyst, Briolette, VS

11.2 x 7.7 mm

$ 16.48

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1.44ct Multicolor Opal, Pear Shape, Opaque

10 x 7 mm (calibrated)

$ 36.01

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1.49ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 11.87

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1.76ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 13.50

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23.19ct White Rainbow Moonstone, Fancy, Transparent

25.8 x 15.4 mm

$ 184.77

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98.04ct Brown Tiger'S Eye, Square, Opaque

27.1 x 26.6 mm

$ 56.96

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1.00ct Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 16.95

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1.05ctw Violet Amethyst, Cushion, Transparent

5 x 5 mm (calibrated)

$ 7.32

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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

Would have bought an indigo and selenite, but neither listed. But, you do offer quite a large assortment otherwise.

Posted By JD in July, 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

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate
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