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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
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Untreated Gemstones Treatment

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0.33ct Orange Spessartite Garnet, Oval, VS-SI

0.33ct Orange Spessartite Garnet, Oval, VS-SI

4.6 x 3.6 mm

$ 11.50

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17.20ct Multicolor Labradorite, Pear Shape, Translucent

17.20ct Multicolor Labradorite, Pear Shape, Translucent

20 x 15 mm (calibrated)

$ 38.03

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1.33ctw Green Peridot, Marquise, VVS-VS

1.33ctw Green Peridot, Marquise, VVS-VS

8 x 4 mm (calibrated)

$ 10.60

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2.07ct Violet Amethyst, Trillion, VS

2.07ct Violet Amethyst, Trillion, VS

9 x 9 mm (calibrated)

$ 15.88

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1.00ct Purple Spinel, Cushion, VS

1.00ct Purple Spinel, Cushion, VS

6.4 x 5.5 mm

$ 119.52

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12.11ct Multicolor Ruby-Zoisite, Marquise, Opaque

12.11ct Multicolor Ruby-Zoisite, Marquise, Opaque

22.9 x 11.3 mm

$ 36.49

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3.32ct Yellow Citrine, Cushion, VVS

3.32ct Yellow Citrine, Cushion, VVS

13.7 x 6.8 mm

$ 25.46

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10.57ct Multicolor Labradorite, Pear Shape, Transparent

10.57ct Multicolor Labradorite, Pear Shape, Transparent

16 x 12 mm (calibrated)

$ 23.37

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9.08ct Brown Smoky Quartz, Emerald Cut, VVS
Smoky Quartz Product Video (514351)

9.08ct Brown Smoky Quartz, Emerald Cut, VVS

12 x 12 mm (calibrated)

$ 16.92

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1.16ct Green Sphene, Oval, Transparent

1.16ct Green Sphene, Oval, Transparent

7.6 x 5.9 mm

$ 5.78

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1.25ct Red Pyrope Garnet, Marquise, VVS

1.25ct Red Pyrope Garnet, Marquise, VVS

10.1 x 5.1 mm

$ 10.96

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57.48ct Red Star Garnet, Oval, Opaque
Star Garnet Product Video (404004)

57.48ct Red Star Garnet, Oval, Opaque

24.4 x 20.4 mm

$ 188.92

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21.61ct Multicolor Opal, Oval, Opaque

21.61ct Multicolor Opal, Oval, Opaque

7 x 17.3 mm

$ 64.57

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12.94ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

12.94ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

20.7 x 13.5 mm

$ 38.66

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1.56ct Blue Kyanite, Oval, VS-SI

1.56ct Blue Kyanite, Oval, VS-SI

8 x 6 mm (calibrated)

$ 34.18

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20.11ct Bi-Color Ametrine, Trillion, VVS

20.11ct Bi-Color Ametrine, Trillion, VVS

18.5 x 16.8 mm

$ 147.17

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1.94ct Yellow Beryl, Round, VVS

1.94ct Yellow Beryl, Round, VVS

9 mm (calibrated)

$ 38.64

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12.34ct Brown Smoky Quartz, Emerald Cut, VS

12.34ct Brown Smoky Quartz, Emerald Cut, VS

14 x 14 mm (calibrated)

$ 33.81

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0.93ctw Red Pyrope Garnet, Square, VVS-VS

0.93ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 7.13

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0.57ct Yellow Zircon, Oval, VS

0.57ct Yellow Zircon, Oval, VS

5.1 x 3.9 mm

$ 7.10

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5.72ct Green Druzy Variscite, Fancy, Opaque

5.72ct Green Druzy Variscite, Fancy, Opaque

18 x 13 mm (calibrated)

$ 5.87

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3.37ct Yellow Citrine, Pear Shape, VVS-VS

3.37ct Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 21.16

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4.45ct Yellow Citrine, Oval, VVS-VS

4.45ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 34.13

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7.09ct Turquoise Fluorite, Oval, Transparent

7.09ct Turquoise Fluorite, Oval, Transparent

13 x 9 mm (calibrated)

$ 17.87

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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

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

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy process.

Posted By Crafty Seabee in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

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