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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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1.15ct Blue Kyanite, Oval, SI

1.15ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 25.20

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0.72ct Green Tourmaline, Emerald Cut, VVS

0.72ct Green Tourmaline, Emerald Cut, VVS

5.7 x 4 mm

$ 35.86

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1.16ct Yellow Beryl, Cushion, VVS

1.16ct Yellow Beryl, Cushion, VVS

8 x 6 mm (calibrated)

$ 27.73

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2.92ct Violet Amethyst, Trillion, VVS-VS

2.92ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.36

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2.52ctw Red Rhodolite Garnet, Square, VS

2.52ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 22.05

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29.71ctw Multicolor Fossil Coral, Fancy, Opaque

29.71ctw Multicolor Fossil Coral, Fancy, Opaque

22.9 x 11.8 mm

$ 38.41

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3.19ctw Orange Moonstone, Oval, Translucent

3.19ctw Orange Moonstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.38

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3.16ct Pink Kunzite, Fancy, VS

3.16ct Pink Kunzite, Fancy, VS

9.6 x 7.4 mm

$ 86.96

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1.02ctw Violet Amethyst, Marquise, VS

1.02ctw Violet Amethyst, Marquise, VS

8 x 4 mm (calibrated)

$ 6.77

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6.42ct Multicolor Pietersite, Oval, Opaque

6.42ct Multicolor Pietersite, Oval, Opaque

16.8 x 10.4 mm

$ 15.16

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1.55ct Brown Kornerupine, Oval, VS-SI
Kornerupine Product Video (389340)

1.55ct Brown Kornerupine, Oval, VS-SI

9 x 6 mm (calibrated)

$ 128.65

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1.33ct Yellow Beryl, Trillion, VS

1.33ct Yellow Beryl, Trillion, VS

8 x 8 mm (calibrated)

$ 31.79

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3.09ct Green Apatite, Emerald Cut, VVS-VS

3.09ct Green Apatite, Emerald Cut, VVS-VS

8.6 x 8.4 mm

$ 162.16

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57.34ct Yellow Obsidian, Oval, Opaque

57.34ct Yellow Obsidian, Oval, Opaque

39.8 x 22.1 mm

$ 62.81

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5.44ct Pink Strawberry Quartz, Round, Translucent

5.44ct Pink Strawberry Quartz, Round, Translucent

11 mm (calibrated)

$ 41.72

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7.44ctw Black Spinel, Round, Opaque

7.44ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 28.53

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0.07ct Black Diamond, Round, Opaque

0.07ct Black Diamond, Round, Opaque

2.5 mm (calibrated)

$ 33.87

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3.14ct Green Prehnite, Pear Shape, Transparent/Translucent

3.14ct Green Prehnite, Pear Shape, Transparent/Translucent

8.4 x 7.8 mm

$ 7.82

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2.35ct Orange Hessonite Garnet, Oval, SI

2.35ct Orange Hessonite Garnet, Oval, SI

9 x 7 mm (calibrated)

$ 36.71

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4.70ct Violet Amethyst, Round, VVS-VS

4.70ct Violet Amethyst, Round, VVS-VS

11 mm (calibrated)

$ 30.89

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0.03ct White Diamond, Round, VVS

0.03ct White Diamond, Round, VVS

2 mm (calibrated)

$ 68.48

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0.27ct Yellow Sphalerite, Oval, VS-SI

0.27ct Yellow Sphalerite, Oval, VS-SI

3.9 x 3.3 mm

$ 13.45

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5.23ct Violet Amethyst, Heart, Transparent

5.23ct Violet Amethyst, Heart, Transparent

12 x 12 mm (calibrated)

$ 26.05

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7.62ct White Rainbow Moonstone, Baguette, Transparent

7.62ct White Rainbow Moonstone, Baguette, Transparent

12.8 x 11.7 mm

$ 136.61

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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!

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IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

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I could see the actual gem I was buying

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