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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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1.40ctw Red Rhodolite Garnet, Square, VS

1.40ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.26

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3.21ct Yellow Sphene, Oval, Transparent

3.21ct Yellow Sphene, Oval, Transparent

9.3 x 8.2 mm

$ 15.99

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15.42ctw Pink Morganite, Oval, Transparent
Morganite Product Video (595004)

15.42ctw Pink Morganite, Oval, Transparent

14 x 12 mm (calibrated)

$ 168.94

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1.26ct Brown Color-Change Garnet, Oval, VS

1.26ct Brown Color-Change Garnet, Oval, VS

7.2 x 5.6 mm

$ 100.65

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0.97ct Brown Color-Change Garnet, Emerald Cut, VS

0.97ct Brown Color-Change Garnet, Emerald Cut, VS

5.6 x 4.4 mm

$ 77.49

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2.77ct Green Tourmaline, Emerald Cut, VS
Tourmaline Product Video (414271)

2.77ct Green Tourmaline, Emerald Cut, VS

16.7 x 4.7 mm

$ 110.36

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1.55ct Yellow Citrine, Emerald Cut, VS

1.55ct Yellow Citrine, Emerald Cut, VS

8.2 x 6.3 mm

$ 10.77

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1.52ctw Orange Morganite, Pear Shape, VS

1.52ctw Orange Morganite, Pear Shape, VS

7.9 x 5.8 mm

$ 91.59

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38.80ct Blue Sodalite, Pear Shape, Opaque
Sodalite Product Video (647919)

38.80ct Blue Sodalite, Pear Shape, Opaque

46.8 x 19.3 mm

$ 38.64

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1.81ct Violet Amethyst, Emerald Cut, VS

1.81ct Violet Amethyst, Emerald Cut, VS

9 x 7 mm (calibrated)

$ 10.89

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45.54ct Violet Charoite, Cushion, Opaque
Charoite Product Video (567105)

45.54ct Violet Charoite, Cushion, Opaque

32.4 x 26.1 mm

$ 85.32

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1.17ct Orange Moonstone, Cushion, Translucent

1.17ct Orange Moonstone, Cushion, Translucent

6 x 6 mm (calibrated)

$ 2.33

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3.59ct Yellow Citrine, Square, VS

3.59ct Yellow Citrine, Square, VS

9 x 9 mm (calibrated)

$ 27.53

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11.52ct Brown Tiger'S Eye, Oval, Opaque

11.52ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 11.47

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2.34ctw Yellow Golden Beryl, Oval, VVS-VS

2.34ctw Yellow Golden Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 64.09

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0.56ct Violet Amethyst, Marquise, VS

0.56ct Violet Amethyst, Marquise, VS

8 x 4 mm (calibrated)

$ 3.72

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1.61ct Orange Moonstone, Trillion, Translucent

1.61ct Orange Moonstone, Trillion, Translucent

7.7 x 7.5 mm

$ 3.20

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3.74ctw Multicolor Andalusite, Round, VS

3.74ctw Multicolor Andalusite, Round, VS

3 mm (calibrated)

$ 164.44

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1.74ct Orange Hessonite Garnet, Round, VS-SI

1.74ct Orange Hessonite Garnet, Round, VS-SI

7 mm (calibrated)

$ 38.13

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0.98ct Green Peridot, Emerald Cut, VS

0.98ct Green Peridot, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 14.64

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2.22ctw Yellow Citrine, Round, VVS-VS

2.22ctw Yellow Citrine, Round, VVS-VS

7 mm (calibrated)

$ 17.69

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1.37ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458405)

1.37ctw Green Demantoid Garnet, Oval, VS

4.4 x 3.7 mm

$ 150.10

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1.07ct Green Tourmaline, Emerald Cut, VS

1.07ct Green Tourmaline, Emerald Cut, VS

19.2 x 2.6 mm

$ 29.32

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1.35ctw Red Rhodolite Garnet, Square, VS

1.35ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.82

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 needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC 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

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

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.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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