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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
Untreated Gemstones Clarity
Untreated Gemstones Price
Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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11.77ct Multicolor Quartz With Marcasite, Oval, Transparent

11.77ct Multicolor Quartz With Marcasite, Oval, Transparent

19.4 x 12.5 mm

$ 77.37

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2.77ctw White Rainbow Moonstone, Square, Transparent

2.77ctw White Rainbow Moonstone, Square, Transparent

3 x 3 mm (calibrated)

$ 43.75

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2.53ct Orange Moonstone, Cushion, Translucent

2.53ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 5.04

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17.39ct Multicolor Boulder Opal, Fancy, Translucent

17.39ct Multicolor Boulder Opal, Fancy, Translucent

23.5 x 16.7 mm

$ 72.17

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0.10ct Black Diamond, Square, Opaque
Diamond Product Video (677913)

0.10ct Black Diamond, Square, Opaque

2.3 x 2.2 mm

$ 42.22

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1.46ct Orange Sunstone, Oval, Translucent

1.46ct Orange Sunstone, Oval, Translucent

8.6 x 6.6 mm

$ 8.72

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2.41ct Multicolor Labradorite, Round, Translucent

2.41ct Multicolor Labradorite, Round, Translucent

8 mm (calibrated)

$ 5.86

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12.53ct Green Peridot, Cushion, VVS-VS
Peridot Product Video (746918)

12.53ct Green Peridot, Cushion, VVS-VS

13.5 x 12.7 mm

$ 3,119.97

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24.86ctw Multicolor Fossil Coral, Oval, Opaque

24.86ctw Multicolor Fossil Coral, Oval, Opaque

23.4 x 12.7 mm

$ 27.24

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1.22ct Orange Zircon, Emerald Cut, VVS-VS

1.22ct Orange Zircon, Emerald Cut, VVS-VS

7.1 x 4.6 mm

$ 20.05

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19.63ct Pink Kunzite, Cushion, VVS-VS
Kunzite Product Video (695863)

19.63ct Pink Kunzite, Cushion, VVS-VS

15.7 x 14.3 mm

$ 488.79

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0.69ct Multicolor Opal, Pear Shape, Transparent

0.69ct Multicolor Opal, Pear Shape, Transparent

7.3 x 5.2 mm

$ 17.18

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1.12ctw Gray Moonstone, Round, Translucent

1.12ctw Gray Moonstone, Round, Translucent

5 mm (calibrated)

$ 5.58

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41.67ct Multicolor Jasper, Fancy, Opaque

41.67ct Multicolor Jasper, Fancy, Opaque

39.6 x 11.7 mm

$ 12.45

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3.94ctw Orange Sunstone, Oval, Translucent

3.94ctw Orange Sunstone, Oval, Translucent

7 x 5 mm (calibrated)

$ 30.22

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3.87ctw Violet Amethyst, Square, VVS-VS
Amethyst Product Video (458035)

3.87ctw Violet Amethyst, Square, VVS-VS

6 x 6 mm (calibrated)

$ 29.68

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3.04ct Violet Amethyst, Trillion, VS

3.04ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 16.65

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10.00ct Yellow Apatite, Oval, VS
Apatite Product Video (398224)

10.00ct Yellow Apatite, Oval, VS

14.6 x 13.2 mm

$ 521.61

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6.02ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

6.02ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

16.9 x 8.2 mm

$ 44.45

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2.21ct Red Almandine Garnet, Oval, VVS-VS

2.21ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 82.54

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0.33ct Pink Morganite, Round, VS

0.33ct Pink Morganite, Round, VS

4.8 mm

$ 13.70

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4.64ct Multicolor Labradorite, Round, Translucent

4.64ct Multicolor Labradorite, Round, Translucent

10 mm (calibrated)

$ 11.27

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1.16ct Pink Strawberry Quartz, Oval, Translucent

1.16ct Pink Strawberry Quartz, Oval, Translucent

7 x 5 mm (calibrated)

$ 4.83

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13.93ct Black Nuummite, Oval, Opaque

13.93ct Black Nuummite, Oval, Opaque

20.1 x 13.1 mm

$ 61.46

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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

If you have motion picture, then I will be more satisfied with.

Posted By Ray in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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