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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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For Example: 8-9
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Yellow Untreated Gemstones
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0.27ct Blue Iolite, Emerald Cut, VS-SI

0.27ct Blue Iolite, Emerald Cut, VS-SI

5 x 3 mm (calibrated)

$ 10.76

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11.42ct Black Tourmaline, Oval, Opaque

11.42ct Black Tourmaline, Oval, Opaque

16.8 x 12.5 mm

$ 56.87

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4.45ctw Red Rhodolite Garnet, Oval, VS

4.45ctw Red Rhodolite Garnet, Oval, VS

7.1 x 5.3 mm

$ 94.63

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25.86ct Turquoise Amazonite, Oval, Translucent

25.86ct Turquoise Amazonite, Oval, Translucent

29.4 x 17.3 mm

$ 20.61

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12.25ct Brown Smoky Quartz, Emerald Cut, VVS

12.25ct Brown Smoky Quartz, Emerald Cut, VVS

14 x 14 mm (calibrated)

$ 24.02

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27.54ct Green Serpentine, Oval, Translucent

27.54ct Green Serpentine, Oval, Translucent

26.6 x 17.1 mm

$ 58.97

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2.94ct Violet Amethyst, Trillion, VS

2.94ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 19.32

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2.69ct Orange Hessonite Garnet, Oval, VS-SI

2.69ct Orange Hessonite Garnet, Oval, VS-SI

9.4 x 7.7 mm

$ 40.11

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1.18ctw Yellow Citrine, Pear Shape, VVS-VS

1.18ctw Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 7.31

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2.71ct Multicolor Labradorite, Baguette, Transparent

2.71ct Multicolor Labradorite, Baguette, Transparent

8.8 x 6.7 mm

$ 5.93

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8.32ctw Pink Strawberry Quartz, Oval, Transparent

8.32ctw Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 127.62

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1.54ct Pink Malaya Garnet, Round, VS

1.54ct Pink Malaya Garnet, Round, VS

7 mm (calibrated)

$ 67.49

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0.80ct Pink Morganite, Oval, VS

0.80ct Pink Morganite, Oval, VS

7.3 x 5.4 mm

$ 35.06

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3.02ct Pink Strawberry Quartz, Oval, Transparent

3.02ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 22.65

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0.27ctw White Diamond, Round, VVS-VS
Diamond Product Video (567450)

0.27ctw White Diamond, Round, VVS-VS

3.2 mm

$ 438.80

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6.77ct Violet Amethyst, Pear Shape, VS

6.77ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 51.92

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3.91ct Multicolor Labradorite, Pear Shape, Translucent

3.91ct Multicolor Labradorite, Pear Shape, Translucent

11 x 9 mm (calibrated)

$ 8.65

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2.10ct Green Chrysoprase, Round, Translucent

2.10ct Green Chrysoprase, Round, Translucent

8 mm (calibrated)

$ 17.43

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21.72ct Brown Moonstone, Oval, Opaque

21.72ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 47.59

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0.75ct Yellow Citrine, Heart, VVS

0.75ct Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 5.23

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0.89ct Green Chrome Diopside, Marquise, VS-SI

0.89ct Green Chrome Diopside, Marquise, VS-SI

10 x 5 mm (calibrated)

$ 22.16

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1.13ct Orange Zircon, Oval, VS

1.13ct Orange Zircon, Oval, VS

6.2 x 5 mm

$ 16.88

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12.63ctw Violet Amethyst, Oval, Transparent

12.63ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 49.95

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1.55ct Green Sphene, Oval, Transparent

1.55ct Green Sphene, Oval, Transparent

7.1 x 6.3 mm

$ 7.72

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 -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
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

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 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

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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