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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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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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33.30ct Violet Amethyst, Oval, IF

23.4 x 16.1 mm

$ 255.38

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32.76ctw Multicolor Fossil Coral, Cushion, Opaque

20.9 x 14.5 mm

$ 37.33

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1.59ct Orange Hessonite Garnet, Oval, VVS-VS

7.8 x 6.4 mm

$ 31.67

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0.90ct Orange Hessonite Garnet, Emerald Cut, VVS

6.3 x 4.6 mm

$ 13.39

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0.22ctw Brown Diamond, Round, VVS-VS

3.1 mm

$ 401.64

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3.50ct Pink Rose Quartz, Emerald Cut, Transparent

9.6 x 9.5 mm

$ 19.17

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1.08ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 268.92

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33.61ct Multicolor Jasper, Oval, Translucent

32.6 x 23.2 mm

$ 44.56

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14.85ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 48.81

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38.66ctw Green Seraphinite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 63.54

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16.10ct Red Ruby-Zoisite, Flower Cut, Opaque

21.1 x 15.6 mm

$ 19.23

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12.60ctw Green Seraphinite, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 20.71

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22.92ct Multicolor Cinnabar, Round, Opaque

24.6 mm

$ 26.83

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0.80ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.16

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7.25ct Multicolor Ruby In Fuchsite, Marquise, Translucent

25.1 x 12.8 mm

$ 54.25

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0.66ct Green Sphene, Oval, SI

5.9 x 4.6 mm

$ 28.93

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5.60ct White Topaz, Oval, VVS

12 x 10 mm (calibrated)

$ 37.18

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7.48ct Blue Hemimorphite Druzy, Fancy, Opaque

17.1 x 9.1 mm

$ 122.92

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0.63ct Yellow Color-Change Diaspore, Emerald Cut, VS

6 x 4 mm (calibrated)

$ 23.87

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1.67ct Brown Axinite, Oval, SI

9 x 7 mm (calibrated)

$ 48.90

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3.35ctw Multicolor Opal, Square, Transparent

4 x 4 mm (calibrated)

$ 23.79

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15.85ctw Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 84.94

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5.56ctw Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 41.70

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9.18ct Green Jadeite, Oval, Translucent

17.8 x 13.7 mm

$ 30.17

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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

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! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
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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