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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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22.52ct Multicolor Jasper, Fancy, Opaque

22.4 x 22.2 mm

$ 30.84

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3.23ct Yellow Rutile Topaz, Pear Shape, Transparent

12.5 x 8.2 mm

$ 67.02

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1.34ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 10.28

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7.89ct Multicolor Jasper, Oval, Opaque

18 x 13 mm (calibrated)

$ 17.29

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5.74ctw Red Almandine Garnet, Round, Transparent

3 mm (calibrated)

$ 31.44

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0.57ct Yellow Citrine, Cushion, Transparent

5 x 5 mm (calibrated)

$ 4.26

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0.64ct Multicolor Chocolate Opal, Oval, Opaque

7 x 5 mm (calibrated)

$ 19.12

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12.66ct Multicolor Opal, Pear Shape, Translucent

18.4 x 13.8 mm

$ 315.23

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2.66ct Yellow Apatite, Emerald Cut, VS

8 x 8 mm (calibrated)

$ 136.97

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3.82ct Blue Chalcedony, Oval, Transparent

11 x 9 mm (calibrated)

$ 7.61

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25.95ctw Multicolor Fossil Coral, Oval, Opaque

21.5 x 13.4 mm

$ 28.44

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2.39ctw Multicolor Labradorite, Oval, Translucent

7 x 7 mm (calibrated)

$ 3.97

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8.21ct Multicolor Agate, Oval, Opaque

13.9 x 10.8 mm

$ 7.77

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4.01ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 24.07

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3.38ct Red Almandine Garnet, Pear Shape, VVS

12 x 8 mm (calibrated)

$ 126.24

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2.40ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.31

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0.76ct Green Tourmaline, Baguette, VVS-VS

10.9 x 2.9 mm

$ 26.49

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1.62ct Red Almandine Garnet, Baguette, VVS

9.9 x 4.9 mm

$ 60.51

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0.73ctw Green Demantoid Garnet, Round, VS

3.1 mm

$ 130.52

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40.20ct Pink Star Rose Quartz, Oval, Translucent

21.8 x 16.6 mm

$ 66.73

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7.78ctw Green Prehnite, Oval, Transparent/Translucent

10 x 8.6 mm

$ 21.31

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6.73ct Multicolor Fire Agate, Fancy, Opaque

15 x 10 mm (calibrated)

$ 51.75

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1.93ct Brown Tiger'S Eye, Pear Shape, Opaque

8 x 8 mm (calibrated)

$ 2.50

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1.32ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 9.20

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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

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 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

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate
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