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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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Yellow Untreated Gemstones
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2.13ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 16.33

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14.02ct Green Maw-Sit-Sit, Oval, Opaque

15.6 x 13.3 mm

$ 46.08

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15.09ct Black Obsidian, Pear Shape, Opaque

23.3 x 16 mm

$ 24.80

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4.49ctw Pink Malaya Garnet, Round, VS

6 mm (calibrated)

$ 176.20

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3.29ct Violet Amethyst, Round, VVS

10 mm (calibrated)

$ 25.23

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9.48ct White Dendritic Agate, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 7.55

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1.58ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 12.59

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1.15ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 30.24

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1.96ctw Green Demantoid Garnet, Oval, VS

4.8 x 3.9 mm

$ 214.74

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2.19ctw Green Demantoid Garnet, Oval, VS

4 x 3 mm (calibrated)

$ 161.42

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14.09ct Multicolor Feather Pyrite, Oval, Opaque

22.6 x 15.3 mm

$ 10.99

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24.82ctw Brown Smoky Quartz, Fancy, Transparent

22.5 x 22.4 mm

$ 40.79

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1.91ct Orange Hessonite Garnet, Round, VS-SI

7 mm (calibrated)

$ 30.96

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2.48ct Yellow Citrine, Trillion, VS

9 x 9 mm (calibrated)

$ 15.35

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1.39ct Purple Spinel, Cushion, VS

6.5 x 6.5 mm

$ 69.86

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0.67ct Purple Spinel, Cushion, VVS-VS

5.4 x 4.5 mm

$ 46.71

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1.99ct Orange Hessonite Garnet, Cushion, VS

8 x 6 mm (calibrated)

$ 39.64

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23.86ct White Scolecite, Cushion, Opaque

25.1 x 21.5 mm

$ 26.15

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6.42ct Purple Kunzite, Oval, VS

15.2 x 8.3 mm

$ 175.84

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6.06ct Multicolor Pietersite, Marquise, Opaque

28.6 x 9.2 mm

$ 22.87

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6.98ctw Green Apatite, Emerald Cut, VS-SI

8 x 8 mm (calibrated)

$ 283.87

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11.10ctw Multicolor Pietersite, Round, Opaque

12 mm (calibrated)

$ 26.20

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0.66ct Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 4.60

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0.24ct Green Peridot, Oval, VVS-VS

5 x 3 mm (calibrated)

$ 1.56

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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

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
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Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy every moment

Posted By Ferns in October, 2025
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Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate
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