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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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Yellow Untreated Gemstones
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2.86ct Yellow Citrine, Emerald Cut, VVS

9.6 x 9.5 mm

$ 15.67

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12.25ct Multicolor Boulder Opal, Fancy, Opaque

30.2 x 15.8 mm

$ 61.01

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1.82ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 72.51

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0.19ct Violet Amethyst, Marquise, Transparent

5.2 x 2.6 mm

$ 1.22

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1.00ct Orange Zircon, Oval, VS

5.9 x 4.8 mm

$ 24.90

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1.46ct Brown Tiger'S Eye, Square, Opaque

6 x 6 mm (calibrated)

$ 1.89

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1.48ct Orange Hessonite Garnet, Oval, VS

7.5 x 6 mm

$ 22.97

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1.61ct Orange Zircon, Emerald Cut, VVS

7 x 5.3 mm

$ 26.46

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36.40ct Multicolor Labradorite, Oval, Opaque

33 x 23.6 mm

$ 32.63

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1.07ct Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 21.31

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0.59ct Red Spinel, Oval, VS

6.5 x 4.6 mm

$ 122.43

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8.72ct White Agate, Oval, Opaque

16 x 12 mm (calibrated)

$ 13.80

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52.86ct Violet Amethyst, Oval, VVS

30.5 x 19.3 mm

$ 421.19

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2.24ct Red Tourmaline, Round, Transparent

8 mm (calibrated)

$ 34.36

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0.62ct Pink Spinel, Cushion, VVS

5.2 x 4 mm

$ 43.23

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13.77ct Multicolor Pietersite, Oval, Opaque

23.1 x 19.5 mm

$ 41.14

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0.46ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.67

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1.43ct Orange Hessonite Garnet, Oval, VS

7.8 x 5.5 mm

$ 21.85

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1.23ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 9.80

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1.57ct Pink Tourmaline, Emerald Cut, VS-SI

12.3 x 4.2 mm

$ 98.90

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2.39ct Orange Sunstone, Oval, Transparent

10.5 x 8.4 mm

$ 14.28

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32.67ctw Multicolor Rhodochrosite, Cushion, Translucent

19.8 x 11.9 mm

$ 28.97

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1.70ct Orange Hessonite Garnet, Oval, VS-SI

8.1 x 6.7 mm

$ 27.94

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12.54ct Green Bloodstone, Oval, Opaque

16 x 12 mm (calibrated)

$ 24.98

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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 -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
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Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
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Overall Rating -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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Overall Rating -> 10 star ratings

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

Posted By Designer in December, 2025
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Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
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Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate
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