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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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0.84ct Green Tourmaline, Oval, Transparent

0.84ct Green Tourmaline, Oval, Transparent

6.4 x 4.9 mm

$ 16.73

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2.20ct Green Tourmaline, Emerald Cut, VS

2.20ct Green Tourmaline, Emerald Cut, VS

17.6 x 4.7 mm

$ 60.26

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0.69ct Green Tourmaline, Baguette, VVS

0.69ct Green Tourmaline, Baguette, VVS

9.2 x 3.2 mm

$ 24.05

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2.87ctw White Rainbow Moonstone, Square, Transparent

2.87ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 45.33

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1.21ct Purple Spinel, Cushion, VVS-VS

1.21ct Purple Spinel, Cushion, VVS-VS

6.2 x 5.5 mm

$ 86.17

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3.70ctw Brown Smoky Quartz, Round, VS

3.70ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 6.08

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16.67ct White Rainbow Moonstone, Pear Shape, Transparent

16.67ct White Rainbow Moonstone, Pear Shape, Transparent

24.3 x 12.5 mm

$ 249.05

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1.22ct Pink Tourmaline, Oval, Transparent

1.22ct Pink Tourmaline, Oval, Transparent

7.9 x 5.7 mm

$ 20.22

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6.77ctw Yellow Citrine, Pear Shape, VVS-VS

6.77ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 52.89

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3.02ct Red Almandine Garnet, Pear Shape, VVS

3.02ct Red Almandine Garnet, Pear Shape, VVS

12 x 8 mm (calibrated)

$ 112.80

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3.07ct Blue Kyanite, Cushion, SI
Kyanite Product Video (680692)

3.07ct Blue Kyanite, Cushion, SI

10.9 x 6.7 mm

$ 76.44

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2.15ct Orange Zircon, Round, VVS

2.15ct Orange Zircon, Round, VVS

7 mm (calibrated)

$ 65.95

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0.90ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.90ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.9 x 5.6 mm

$ 47.09

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12.42ctw Green Seraphinite, Pear Shape, Opaque

12.42ctw Green Seraphinite, Pear Shape, Opaque

14 x 10 mm (calibrated)

$ 17.01

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1.44ct Green Tourmaline, Cushion, VS

1.44ct Green Tourmaline, Cushion, VS

6.8 x 6.3 mm

$ 167.33

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1.76ct Brown Color-Change Garnet, Oval, VVS-VS

1.76ct Brown Color-Change Garnet, Oval, VVS-VS

7.9 x 6.7 mm

$ 140.60

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0.76ct Orange Hessonite Garnet, Baguette, VS

0.76ct Orange Hessonite Garnet, Baguette, VS

6.1 x 3.8 mm

$ 16.65

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2.72ct Violet Amethyst, Trillion, VS

2.72ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.67

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2.23ct Yellow Citrine, Flower Cut, Transparent

2.23ct Yellow Citrine, Flower Cut, Transparent

8 x 8 mm (calibrated)

$ 17.10

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1.19ct Pink Tourmaline, Emerald Cut, SI

1.19ct Pink Tourmaline, Emerald Cut, SI

9.8 x 4.3 mm

$ 89.96

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0.90ctw Red Pyrope Garnet, Square, VS

0.90ctw Red Pyrope Garnet, Square, VS

4.2 x 4.2 mm

$ 6.91

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0.66ct Yellow Color-Change Diaspore, Oval, VVS-VS

0.66ct Yellow Color-Change Diaspore, Oval, VVS-VS

6 x 4.7 mm

$ 34.84

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2.37ctw Green Peridot, Round, VVS-VS

2.37ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 38.95

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1.16ct Purple Spinel, Cushion, VS

1.16ct Purple Spinel, Cushion, VS

6.9 x 5.3 mm

$ 138.64

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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!

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Love, and have always loved, your website.

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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.

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Very food

Posted By Keeto in July, 2025
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Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
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Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
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