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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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Untreated Gemstones Treatment

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8.01ct Multicolor Chocolate Opal, Oval, Transparent

8.01ct Multicolor Chocolate Opal, Oval, Transparent

14 x 12 mm (calibrated)

$ 199.45

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9.82ct Multicolor Agate, Round, Opaque

9.82ct Multicolor Agate, Round, Opaque

13 mm (calibrated)

$ 16.62

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3.10ct Red Fire Opal, Oval, Transparent

3.10ct Red Fire Opal, Oval, Transparent

12.4 x 9.4 mm

$ 99.82

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16.71ctw Multicolor Fossil Coral, Oval, Opaque

16.71ctw Multicolor Fossil Coral, Oval, Opaque

17.7 x 9.7 mm

$ 21.60

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3.97ct Multicolor Rainbow Pyrite, Square, Opaque

3.97ct Multicolor Rainbow Pyrite, Square, Opaque

10 x 10 mm (calibrated)

$ 10.28

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6.83ctw White Moonstone, Round, Translucent

6.83ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 18.71

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2.48ctw Violet Amethyst, Oval, VVS-VS

2.48ctw Violet Amethyst, Oval, VVS-VS

6.1 x 4.2 mm

$ 13.59

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38.70ct Pink Rose Quartz, Oval, Transparent

38.70ct Pink Rose Quartz, Oval, Transparent

22.4 x 18.2 mm

$ 57.25

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1.53ct Purple Spinel, Cushion, VVS

1.53ct Purple Spinel, Cushion, VVS

6.9 x 6.6 mm

$ 78.45

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1.62ct Yellow Citrine, Emerald Cut, VS

1.62ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 12.91

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0.90ct Yellow Beryl, Oval, VS

0.90ct Yellow Beryl, Oval, VS

7.9 x 5.6 mm

$ 22.41

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8.79ct Green Chrysoprase, Baguette, Opaque
Chrysoprase Product Video (750204)

8.79ct Green Chrysoprase, Baguette, Opaque

16 x 12 mm (calibrated)

$ 145.91

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13.46ctw Black Star Diopside, Oval, Opaque

13.46ctw Black Star Diopside, Oval, Opaque

11 x 9 mm (calibrated)

$ 67.03

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1.16ct Pink Spinel, Cushion, VS

1.16ct Pink Spinel, Cushion, VS

6.5 x 5.6 mm

$ 86.65

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1.66ct Yellow Citrine, Round, VS

1.66ct Yellow Citrine, Round, VS

7.5 mm (calibrated)

$ 13.23

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0.66ct Green Tourmaline, Baguette, VVS

0.66ct Green Tourmaline, Baguette, VVS

8.5 x 3 mm

$ 23.01

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4.94ct Yellow Citrine, Oval, VVS-VS

4.94ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 29.66

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1.86ctw Orange Hessonite Garnet, Square, VS

1.86ctw Orange Hessonite Garnet, Square, VS

3.8 x 3.8 mm

$ 32.98

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0.37ct Yellow Citrine, Heart, VVS

0.37ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 2.46

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1.29ct Yellow Color-Change Diaspore, Cushion, VS

1.29ct Yellow Color-Change Diaspore, Cushion, VS

8.5 x 5.6 mm

$ 68.76

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1.58ct Yellow Citrine, Trillion, VVS-VS

1.58ct Yellow Citrine, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 12.59

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0.49ct Orange Citrine, Marquise, VVS

0.49ct Orange Citrine, Marquise, VVS

8 x 4.2 mm

$ 3.66

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5.37ct Multicolor Dendritic Agate, Pear Shape, Translucent
Dendritic Agate Product Video (744388)

5.37ct Multicolor Dendritic Agate, Pear Shape, Translucent

19.6 x 14.2 mm

$ 19.07

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2.26ct Yellow Citrine, Square, VVS

2.26ct Yellow Citrine, Square, VVS

8 x 8 mm (calibrated)

$ 13.23

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

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
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The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

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It was all good

Posted By Debsarabs in February, 2026
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Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
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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.

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Overall Rating -> 10 star ratings

Good. I ts very user friendly.

Posted By Shalini in June, 2025
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