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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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3.90ctw Red Pyrope Garnet, Square, VS

3.9 x 3.8 mm

$ 29.91

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0.41ct Orange Spessartite Garnet, Oval, VS

4.8 x 4 mm

$ 14.29

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4.03ctw Red Pyrope Garnet, Square, VS

3.8 x 3.7 mm

$ 30.91

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8.21ctw White Topaz, Heart, VVS-VS

10 x 10 mm (calibrated)

$ 68.14

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1.44ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 35.86

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1.50ct Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 22.31

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1.18ct Green Sphene, Oval, Transparent

6.4 x 5.3 mm

$ 5.88

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34.49ct Multicolor Agate, Round, Opaque

14 mm (calibrated)

$ 34.35

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6.49ct Multicolor Labradorite, Pear Shape, Translucent

14 x 10 mm (calibrated)

$ 14.35

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6.46ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 35.39

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3.52ct Yellow Citrine, Oval, VS

12.4 x 9.5 mm

$ 26.99

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0.57ct Green Tourmaline, Baguette, VVS

13.7 x 2.4 mm

$ 19.87

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4.50ct Red Rhodolite Garnet, Heart, VVS-VS

11 x 9 mm (calibrated)

$ 186.75

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1.33ct Multicolor Opal, Oval, Transparent

12.7 x 7.2 mm

$ 27.60

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15.75ctw Green Prehnite, Fancy, Transparent

16 x 12 mm (calibrated)

$ 24.67

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4.37ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 26.24

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4.56ct Yellow Citrine, Emerald Cut, VVS-VS

12 x 10 mm (calibrated)

$ 30.58

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0.82ct Blue Kyanite, Round, SI

5.2 mm

$ 24.96

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14.11ctw Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 14.05

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19.07ct Violet Amethyst, Cushion, VVS

19 x 18 mm

$ 132.96

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6.79ct Green Amazonite, Marquise, Opaque

19.7 x 10 mm

$ 16.29

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16.80ct Violet Amethyst, Oval, IF

20 x 15 mm (calibrated)

$ 111.55

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2.16ct Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 5.25

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0.87ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 13.00

View Gem
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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

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate
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