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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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4.54ct Red Almandine Garnet, Oval, VVS

4.54ct Red Almandine Garnet, Oval, VVS

11.2 x 8.2 mm

$ 158.26

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6.75ct White Dendritic Agate, Pear Shape, Opaque

6.75ct White Dendritic Agate, Pear Shape, Opaque

18 x 13 mm (calibrated)

$ 5.38

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1.42ct Multicolor Opal, Oval, Transparent

1.42ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 44.67

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3.99ctw White Topaz, Square, VS

3.99ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 30.59

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2.27ct Bi-Color Tourmaline, Emerald Cut, VVS-VS
Tourmaline Product Video (744043)

2.27ct Bi-Color Tourmaline, Emerald Cut, VVS-VS

10.3 x 5.2 mm

$ 508.71

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39.99ct White Rainbow Moonstone, Oval, Translucent

39.99ct White Rainbow Moonstone, Oval, Translucent

31.7 x 17.5 mm

$ 39.83

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0.45ct Pink Morganite, Round, VS

0.45ct Pink Morganite, Round, VS

5.2 mm

$ 20.17

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19.84ctw Multicolor Fossil Coral, Pear Shape, Opaque

19.84ctw Multicolor Fossil Coral, Pear Shape, Opaque

19.2 x 10.8 mm

$ 43.48

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12.80ct Brown Tiger'S Eye, Baguette, Opaque

12.80ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 12.75

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8.64ctw Green Amazonite, Round, Opaque

8.64ctw Green Amazonite, Round, Opaque

8 mm (calibrated)

$ 19.19

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1.36ctw White Sillimanite Cat'S Eye, Oval, Transparent

1.36ctw White Sillimanite Cat'S Eye, Oval, Transparent

6.7 x 3.7 mm

$ 4.29

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2.19ct Orange Moonstone, Trillion, Translucent

2.19ct Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 4.37

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1.09ct Green Tourmaline, Emerald Cut, VVS-VS

1.09ct Green Tourmaline, Emerald Cut, VVS-VS

10.4 x 3.9 mm

$ 54.28

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1.83ctw Orange Sunstone, Oval, Translucent

1.83ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 10.63

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3.47ct Yellow Citrine, Oval, VVS-VS

3.47ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 24.19

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0.83ct Yellow Color-Change Diaspore, Square, VVS-VS

0.83ct Yellow Color-Change Diaspore, Square, VVS-VS

5 x 5 mm (calibrated)

$ 34.30

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28.20ctw Multicolor Fossil Coral, Oval, Opaque

28.20ctw Multicolor Fossil Coral, Oval, Opaque

21.1 x 13.6 mm

$ 33.37

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1.61ct Orange Hessonite Garnet, Round, VS-SI

1.61ct Orange Hessonite Garnet, Round, VS-SI

7 mm (calibrated)

$ 29.99

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13.47ctw Black Spinel, Round, Opaque

13.47ctw Black Spinel, Round, Opaque

12 mm (calibrated)

$ 44.27

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2.98ct Blue Chalcedony, Oval, Transparent

2.98ct Blue Chalcedony, Oval, Transparent

11 x 9 mm (calibrated)

$ 5.93

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7.67ct Pink Morganite, Oval, Translucent

7.67ct Pink Morganite, Oval, Translucent

15.9 x 10.2 mm

$ 76.39

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1.97ct Pink Strawberry Quartz, Round, Translucent

1.97ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 15.11

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62.40ct Multicolor Jasper, Pear Shape, Opaque

62.40ct Multicolor Jasper, Pear Shape, Opaque

42.6 x 35.6 mm

$ 49.72

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18.37ct Violet Amethyst, Cushion, VVS-VS

18.37ct Violet Amethyst, Cushion, VVS-VS

20 x 15 mm (calibrated)

$ 128.08

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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

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

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!

Posted By Britnee Rose in September, 2025
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

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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate
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