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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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0.25ct Yellow Spessartite Garnet, Oval, VS-SI

0.25ct Yellow Spessartite Garnet, Oval, VS-SI

4.2 x 3.1 mm

$ 8.72

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1.11ct Brown Color-Change Garnet, Round, VS

1.11ct Brown Color-Change Garnet, Round, VS

6 mm (calibrated)

$ 88.68

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1.24ct Green Tourmaline, Emerald Cut, VVS-VS

1.24ct Green Tourmaline, Emerald Cut, VVS-VS

15.7 x 3.2 mm

$ 23.69

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1.89ct Orange Moonstone, Trillion, Translucent

1.89ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 3.77

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4.70ctw Red Pyrope Garnet, Pear Shape, VS

4.70ctw Red Pyrope Garnet, Pear Shape, VS

7 x 5 mm (calibrated)

$ 36.05

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1.57ct Orange Hessonite Garnet, Cushion, VS-SI

1.57ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 26.74

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7.09ct Brown Tiger'S Eye, Oval, Opaque

7.09ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 7.06

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3.97ctw Violet Amethyst, Oval, VVS-VS

3.97ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 21.75

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3.91ct Yellow Citrine, Oval, VVS-VS

3.91ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 31.16

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7.38ct Multicolor Labradorite, Pear Shape, Translucent

7.38ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 16.32

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1.28ct Multicolor Black Opal, Oval, Opaque

1.28ct Multicolor Black Opal, Oval, Opaque

9 x 7 mm (calibrated)

$ 33.66

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2.17ct Red Almandine Garnet, Marquise, VVS

2.17ct Red Almandine Garnet, Marquise, VVS

12 x 6 mm (calibrated)

$ 81.05

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0.94ct Green Peridot, Oval, VVS-VS

0.94ct Green Peridot, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.56

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1.46ct Multicolor Labradorite, Marquise, Translucent

1.46ct Multicolor Labradorite, Marquise, Translucent

10 x 5 mm (calibrated)

$ 3.23

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0.80ct Orange Zircon, Oval, VVS

0.80ct Orange Zircon, Oval, VVS

6.1 x 4.2 mm

$ 11.95

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2.97ct Green Prehnite, Pear Shape, Transparent/Translucent

2.97ct Green Prehnite, Pear Shape, Transparent/Translucent

10.8 x 7.6 mm

$ 6.51

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2.14ct Yellow Rutile Quartz, Pear Shape, Transparent

2.14ct Yellow Rutile Quartz, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 5.77

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2.94ct Green Prehnite, Oval, Transparent

2.94ct Green Prehnite, Oval, Transparent

9.6 x 7.6 mm

$ 15.98

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40.67ct Multicolor Jasper, Oval, Opaque

40.67ct Multicolor Jasper, Oval, Opaque

30.8 x 23.6 mm

$ 28.52

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29.15ct Pink Coral, Flower Cut, Opaque
Coral Product Video (333717)

29.15ct Pink Coral, Flower Cut, Opaque

25 x 16.7 mm

$ 415.18

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27.85ctw Black Spinel, Baguette, Opaque

27.85ctw Black Spinel, Baguette, Opaque

20.2 x 10 mm

$ 83.22

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2.27ct Green Peridot, Cushion, VS

2.27ct Green Peridot, Cushion, VS

8 x 7 mm

$ 89.38

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2.76ct Pink Kunzite, Oval, VVS

2.76ct Pink Kunzite, Oval, VVS

9.4 x 7.4 mm

$ 68.72

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16.91ct Pink Rose Quartz, Oval, Transparent

16.91ct Pink Rose Quartz, Oval, Transparent

18 x 13 mm (calibrated)

$ 25.26

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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

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.

Posted By Bob D in December, 2025
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

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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