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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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18.75ct Green Opal, Oval, Opaque

18.75ct Green Opal, Oval, Opaque

21.8 x 17.5 mm

$ 40.15

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1.29ct Brown Sillimanite Cat'S Eye, Oval, Transparent

1.29ct Brown Sillimanite Cat'S Eye, Oval, Transparent

6.6 x 4.9 mm

$ 3.85

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11.81ct Black Tourmaline, Emerald Cut, Opaque

11.81ct Black Tourmaline, Emerald Cut, Opaque

25 x 8.1 mm

$ 58.81

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1.57ctw Orange Moonstone, Trillion, Translucent

1.57ctw Orange Moonstone, Trillion, Translucent

6 x 6 mm (calibrated)

$ 3.15

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1.66ctw Red Pyrope Garnet, Heart, VVS-VS

1.66ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 12.73

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2.30ct Pink Tourmaline, Emerald Cut, VS

2.30ct Pink Tourmaline, Emerald Cut, VS

7.3 x 7.1 mm

$ 173.87

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62.94ct Violet Amethyst, Pear Shape, VVS
Amethyst Product Video (724443)

62.94ct Violet Amethyst, Pear Shape, VVS

32.5 x 21.7 mm

$ 471.42

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0.76ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.76ct Yellow Color-Change Diaspore, Emerald Cut, VS

7.1 x 3.7 mm

$ 28.80

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3.75ctw Multicolor Andalusite, Oval, VS-SI

3.75ctw Multicolor Andalusite, Oval, VS-SI

6 x 4 mm (calibrated)

$ 184.89

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11.77ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (471780)

11.77ct Turquoise Grandidierite, Oval, Translucent

16.9 x 13.8 mm

$ 902.67

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0.58ct Green Tourmaline, Baguette, VVS-VS

0.58ct Green Tourmaline, Baguette, VVS-VS

5.1 x 4.6 mm

$ 28.88

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1.13ct Orange Zircon, Round, VS

1.13ct Orange Zircon, Round, VS

6 mm (calibrated)

$ 26.96

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2.30ct Orange Moonstone, Cushion, Translucent

2.30ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.58

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0.92ct Pink Morganite, Oval, VS

0.92ct Pink Morganite, Oval, VS

6.9 x 5.8 mm

$ 55.44

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40.36ct Multicolor Jasper, Oval, Opaque

40.36ct Multicolor Jasper, Oval, Opaque

35.9 x 26.6 mm

$ 24.32

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2.09ct Multicolor Labradorite, Marquise, Translucent

2.09ct Multicolor Labradorite, Marquise, Translucent

12 x 6 mm (calibrated)

$ 4.62

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4.00ct White Topaz, Oval, VVS-VS

4.00ct White Topaz, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 30.68

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55.24ct Green Bloodstone, Oval, Opaque

55.24ct Green Bloodstone, Oval, Opaque

32.2 x 22.3 mm

$ 82.53

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0.68ct Green Peridot, Oval, VVS-VS

0.68ct Green Peridot, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 12.19

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2.00ctw Red Pyrope Garnet, Oval, VS

2.00ctw Red Pyrope Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 17.33

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1.40ct Yellow Color-Change Diaspore, Cushion, VS-SI

1.40ct Yellow Color-Change Diaspore, Cushion, VS-SI

9.7 x 4.9 mm

$ 74.61

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0.73ct Pink Malaya Garnet, Round, VS

0.73ct Pink Malaya Garnet, Round, VS

5.2 mm

$ 31.99

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1.10ct Green Peridot, Oval, VVS-VS

1.10ct Green Peridot, Oval, VVS-VS

7.4 x 5.6 mm

$ 9.86

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1.42ct Pink Tourmaline, Round, Transparent

1.42ct Pink Tourmaline, Round, Transparent

6.5 mm (calibrated)

$ 21.66

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 -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
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

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
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
→ View All GemSelect Reviews on Bizrate
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