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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

Size Explained

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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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3.53ct Violet Amethyst, Heart, VS

10 x 10 mm (calibrated)

$ 27.69

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1.41ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 9.83

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9.55ct Brown Moonstone, Oval, Translucent

14 x 10 mm (calibrated)

$ 21.03

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1.81ctw Yellow Citrine, Marquise, VS

9.1 x 5.2 mm

$ 14.43

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0.64ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 9.56

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1.72ct Green Sphene, Oval, Transparent

7.1 x 6.4 mm

$ 8.57

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0.88ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 12.27

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1.72ct Multicolor Opal, Oval, Transparent

10.9 x 7.2 mm

$ 42.83

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4.60ct Green Chrysoprase, Oval, Opaque

12 x 10 mm (calibrated)

$ 38.18

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6.20ct Violet Amethyst, Pear Shape, Transparent

15.5 x 11.3 mm

$ 37.05

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0.76ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 7.57

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4.58ctw Green Prehnite, Oval, Transparent

8.6 x 8 mm

$ 25.09

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0.41ct Pink Morganite, Round, VS

5.5 mm (calibrated)

$ 17.02

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0.69ct Yellow Color-Change Garnet, Emerald Cut, VS

7 x 3.5 mm

$ 75.60

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41.31ct Multicolor Labradorite, Fancy, Opaque

47.6 x 10.7 mm

$ 12.34

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1.47ct Red Tourmaline, Round, Transparent

7 mm (calibrated)

$ 25.20

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31.26ct Multicolor Agate, Fancy, Opaque

23.7 x 11.2 mm

$ 54.75

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0.89ct Yellow Morganite, Oval, VVS

8 x 6 mm (calibrated)

$ 39.00

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2.44ct Multicolor Labradorite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 5.40

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7.33ct Brown Smoky Quartz, Emerald Cut, VVS-VS

12 x 12 mm (calibrated)

$ 12.05

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7.88ct White Rainbow Moonstone, Pear Shape, Translucent

20 x 8.7 mm

$ 54.94

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3.47ct Pink Strawberry Quartz, Round, Translucent

10 mm (calibrated)

$ 20.92

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1.68ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 3.34

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2.35ct Yellow Sillimanite, Oval, VS

10 x 8 mm (calibrated)

$ 58.11

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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

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
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

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It's always a pleasure doing business with Gem Select. Outstanding products ant very reasonable prices. Thank You One and All.

Posted By G.W. or Bakyow in July, 2025
Source: Bizrate
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