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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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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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9.97ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 38.24

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4.10ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.46

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0.70ct Multicolor Labradorite, Pear Shape, Translucent

6 x 4 mm (calibrated)

$ 1.54

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25.67ct Multicolor Jasper, Oval, Opaque

29.8 x 20.9 mm

$ 15.47

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2.07ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 38.83

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29.30ct White Dendritic Agate, Pear Shape, Opaque

33.4 x 18.8 mm

$ 20.43

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8.48ct Multicolor Agate, Fancy, Translucent

16 x 7.5 mm

$ 14.85

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38.31ct Multicolor Jasper, Baguette, Opaque

27 x 20 mm (calibrated)

$ 23.51

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1.12ctw Violet Amethyst, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 7.44

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1.65ct Orange Zircon, Emerald Cut, VVS

7 x 5 mm (calibrated)

$ 45.20

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0.16ct Pink Morganite, Round, VVS-VS

3.8 mm

$ 6.64

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1.76ct Orange Moonstone, Square, Transparent

7 x 7 mm (calibrated)

$ 3.53

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16.19ct White Rainbow Moonstone, Fancy, Transparent

18 x 13.7 mm

$ 290.25

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33.76ct Multicolor Jasper, Oval, Opaque

30 x 22 mm (calibrated)

$ 22.92

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4.93ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 9.82

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5.96ct Multicolor Pietersite, Oval, Opaque

15 x 10 mm (calibrated)

$ 14.08

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3.82ctw Orange Citrine, Round, VS

8 mm (calibrated)

$ 31.71

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1.49ct Multicolor Opal, Baguette, Transparent

9 x 7 mm (calibrated)

$ 45.71

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12.49ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 99.52

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3.06ct Turquoise Fluorite, Oval, Transparent

9 x 7 mm (calibrated)

$ 12.19

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0.87ct Yellow Color-Change Garnet, Cushion, VS

7.1 x 4.5 mm

$ 85.79

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1.02ct Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 6.37

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1.44ctw Green Demantoid Garnet, Oval, VS

4.6 x 3.8 mm

$ 157.77

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14.78ct Green Bloodstone, Pear Shape, Opaque

18.2 x 13.6 mm

$ 32.39

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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

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 -> 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 good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

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
Enlarged Gemstone Image