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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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2.68ctw Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 44.42

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3.32ct Yellow Citrine, Cushion, VVS-VS

12.1 x 7.1 mm

$ 25.46

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2.56ctw Violet Amethyst, Emerald Cut, Transparent

7 x 5 mm (calibrated)

$ 15.30

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2.87ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 15.73

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0.74ct Yellow Color-Change Garnet, Emerald Cut, VVS-VS

7 x 3.5 mm

$ 76.61

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1.29ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 22.11

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1.29ct Pink Morganite, Round, VS

7.5 mm (calibrated)

$ 50.11

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3.65ct White Topaz, Round, VVS-VS

9.5 mm (calibrated)

$ 32.11

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71.31ct Yellow Obsidian, Cushion, Opaque

48.6 x 22.2 mm

$ 78.13

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40.88ct Green Amazonite, Fancy, Opaque

40.2 x 11.9 mm

$ 8.15

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2.47ct Turquoise Fluorite, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 9.84

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0.98ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.83

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0.95ct Yellow Color-Change Diaspore, Cushion, VVS-VS

7.9 x 4.8 mm

$ 33.31

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4.24ct Violet Amethyst, Pear Shape, VVS

14 x 10 mm (calibrated)

$ 30.79

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10.55ctw Green Prehnite, Fancy, Translucent

15.5 x 10.8 mm

$ 17.33

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0.41ct Yellow Citrine, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 2.86

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1.73ct Violet Amethyst, Marquise, VS

12.2 x 6 mm

$ 13.26

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34.52ct Multicolor Bloodstone, Round, Opaque

27.1 mm

$ 15.82

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1.45ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 10.11

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20.05ct Pink Rose Quartz, Oval, Transparent

20 x 15 mm (calibrated)

$ 29.66

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0.68ct Yellow Citrine, Trillion, VS-SI

6 x 6 mm (calibrated)

$ 5.64

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2.56ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 22.44

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112.97ct Green Moss Agate, Square, Opaque

28.6 x 27.9 mm

$ 93.77

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2.00ct White Rainbow Moonstone, Cushion, VVS-VS

7.4 x 7.4 mm

$ 209.16

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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 found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
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
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