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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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1.09ct Pink Strawberry Quartz, Round, Transparent

1.09ct Pink Strawberry Quartz, Round, Transparent

7 mm (calibrated)

$ 9.55

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0.04ct Black Diamond, Round, Opaque

0.04ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 31.87

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13.59ct Multicolor Cinnabar, Square, Opaque

13.59ct Multicolor Cinnabar, Square, Opaque

17 x 17 mm (calibrated)

$ 15.90

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1.23ct Violet Amethyst, Square, VVS

1.23ct Violet Amethyst, Square, VVS

6.6 x 6.5 mm

$ 9.80

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0.89ct Yellow Morganite, Pear Shape, VS

0.89ct Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 48.75

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20.87ct Multicolor Jasper, Pear Shape, Opaque

20.87ct Multicolor Jasper, Pear Shape, Opaque

28.5 x 20.2 mm

$ 17.25

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6.88ct Pink Rose Quartz, Round, Transparent

6.88ct Pink Rose Quartz, Round, Transparent

12 mm (calibrated)

$ 37.69

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0.74ctw Green Peridot, Pear Shape, VS

0.74ctw Green Peridot, Pear Shape, VS

6 x 4 mm (calibrated)

$ 6.63

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4.22ct Violet Amethyst, Oval, Transparent
Amethyst Product Video (642724)

4.22ct Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 25.22

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7.26ct Yellow Apatite, Cushion, VVS-VS
Apatite Product Video (385924)

7.26ct Yellow Apatite, Cushion, VVS-VS

11.9 x 10.4 mm

$ 383.38

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1.20ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.20ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7 x 4.5 mm

$ 3.94

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11.50ctw Black Spinel, Round, Opaque

11.50ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 35.79

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0.87ct Green Tourmaline, Emerald Cut, VVS-VS

0.87ct Green Tourmaline, Emerald Cut, VVS-VS

14.5 x 3.1 mm

$ 28.59

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0.42ct Orange Sphalerite, Round, SI

0.42ct Orange Sphalerite, Round, SI

4.2 mm

$ 20.92

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7.33ct Yellow Citrine, Oval, VVS

7.33ct Yellow Citrine, Oval, VVS

15.2 x 10.8 mm

$ 56.22

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6.03ct Pink Kunzite, Cushion, VS

6.03ct Pink Kunzite, Cushion, VS

10.4 x 9.7 mm

$ 150.15

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1.37ct Yellow Beryl, Oval, VVS

1.37ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 34.11

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2.17ct Pink Tourmaline, Oval, Transparent

2.17ct Pink Tourmaline, Oval, Transparent

8 x 6.9 mm

$ 37.20

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.74ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6 x 4 mm (calibrated)

$ 26.44

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7.04ctw Yellow Citrine, Pear Shape, VVS-VS

7.04ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 46.27

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1.43ct White Sillimanite Cat'S Eye, Oval, Transparent

1.43ct White Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 4.47

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100.81ct Multicolor Agate, Oval, Opaque
Agate Product Video (724806)

100.81ct Multicolor Agate, Oval, Opaque

32.2 x 26.6 mm

$ 95.38

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1.44ct Yellow Citrine, Emerald Cut, VVS-VS

1.44ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 10.04

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2.82ct Orange Hessonite Garnet, Oval, VS-SI

2.82ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7.8 mm

$ 40.05

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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

Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones

Posted By Edsor works in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
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

It was easy to navigate

Posted By GemGod 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
→ View All GemSelect Reviews on Bizrate
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