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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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Bi-color Untreated Gemstones
Black Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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1.93ct Pink Strawberry Quartz, Round, Translucent

1.93ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 14.80

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1.76ct Pink Strawberry Quartz, Oval, Transparent

1.76ct Pink Strawberry Quartz, Oval, Transparent

8 x 6 mm (calibrated)

$ 8.80

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39.78ct Multicolor Opal, Pear Shape, Transparent
Opal Product Video (746925)

39.78ct Multicolor Opal, Pear Shape, Transparent

33.2 x 19.8 mm

$ 2,311.22

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4.02ctw Yellow Citrine, Oval, VVS-VS

4.02ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 22.02

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1.09ct Purple Rhodolite Garnet, Oval, VS

1.09ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 28.95

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2.63ct White Opal, Pear Shape, Translucent

2.63ct White Opal, Pear Shape, Translucent

14 x 9 mm (calibrated)

$ 66.14

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1.09ct Green Sphene, Oval, Transparent

1.09ct Green Sphene, Oval, Transparent

6.9 x 5.5 mm

$ 5.43

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1.25ct Yellow Beryl, Trillion, VVS-VS

1.25ct Yellow Beryl, Trillion, VVS-VS

8 x 8 mm (calibrated)

$ 29.88

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1.73ct Orange Citrine, Pear Shape, VVS-VS

1.73ct Orange Citrine, Pear Shape, VVS-VS

10 x 7 mm (calibrated)

$ 14.36

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0.76ct Multicolor Opal, Pear Shape, Transparent

0.76ct Multicolor Opal, Pear Shape, Transparent

11 x 5.3 mm

$ 34.06

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

1.9 mm (calibrated)

$ 10.27

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11.80ctw Green Prehnite, Fancy, Translucent

11.80ctw Green Prehnite, Fancy, Translucent

15.8 x 10.8 mm

$ 19.39

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0.77ct Orange Hessonite Garnet, Oval, VS

0.77ct Orange Hessonite Garnet, Oval, VS

6 x 5 mm

$ 15.34

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0.78ct Brown Chocolate Opal, Oval, Opaque

0.78ct Brown Chocolate Opal, Oval, Opaque

8 x 6 mm (calibrated)

$ 23.31

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2.18ctw White Sillimanite Cat'S Eye, Oval, Translucent

2.18ctw White Sillimanite Cat'S Eye, Oval, Translucent

6.6 x 4.5 mm

$ 7.16

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25.04ct Gray Hematite, Emerald Cut, Opaque

25.04ct Gray Hematite, Emerald Cut, Opaque

20.9 x 15.1 mm

$ 27.43

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2.84ct Blue Chalcedony, Oval, Transparent

2.84ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 5.66

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0.54ct Green Peridot, Marquise, VS

0.54ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 8.07

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14.10ctw Black Spinel, Round, Opaque

14.10ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 43.87

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3.00ctw White Topaz, Cushion, VVS-VS

3.00ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.43

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1.23ct Orange Hessonite Garnet, Square, VS

1.23ct Orange Hessonite Garnet, Square, VS

6 x 6 mm (calibrated)

$ 20.63

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0.77ct Green Peridot, Square, Transparent

0.77ct Green Peridot, Square, Transparent

5 x 5 mm (calibrated)

$ 6.76

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1.50ctw White Rainbow Moonstone, Pear Shape, Transparent

1.50ctw White Rainbow Moonstone, Pear Shape, Transparent

5 x 5 mm (calibrated)

$ 27.94

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20.09ct Brown Smoky Quartz, Fancy, Transparent

20.09ct Brown Smoky Quartz, Fancy, Transparent

35.1 x 19.1 mm

$ 33.02

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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate
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