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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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For Example: 8-9
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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0.53ct Orange Sphalerite, Round, SI

0.53ct Orange Sphalerite, Round, SI

4.7 mm

$ 26.39

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2.14ctw White Rainbow Moonstone, Oval, Translucent

2.14ctw White Rainbow Moonstone, Oval, Translucent

7.1 x 6.2 mm

$ 41.92

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4.99ct Orange Moonstone, Oval, Translucent

4.99ct Orange Moonstone, Oval, Translucent

12 x 8 mm (calibrated)

$ 10.54

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1.22ct Purple Spinel, Cushion, VVS-VS

1.22ct Purple Spinel, Cushion, VVS-VS

6.2 x 5.5 mm

$ 86.88

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9.44ctw Multicolor Pietersite, Fancy, Opaque

9.44ctw Multicolor Pietersite, Fancy, Opaque

20.3 x 9.8 mm

$ 22.09

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1.22ct Red Rhodolite Garnet, Fancy, VS

1.22ct Red Rhodolite Garnet, Fancy, VS

6.8 x 5.8 mm

$ 45.57

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1.77ct Multicolor Labradorite, Pear Shape, Translucent

1.77ct Multicolor Labradorite, Pear Shape, Translucent

9.2 x 6.3 mm

$ 3.92

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8.14ct Multicolor Agate, Oval, Opaque

8.14ct Multicolor Agate, Oval, Opaque

12.9 x 11.8 mm

$ 13.79

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3.73ct Yellow Zircon, Oval, VS
Zircon Product Video (745616)

3.73ct Yellow Zircon, Oval, VS

9 x 7 mm (calibrated)

$ 216.71

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85.53ct Multicolor Ruby-Zoisite, Oval, Opaque
Ruby-Zoisite Product Video (484096)

85.53ct Multicolor Ruby-Zoisite, Oval, Opaque

38.2 x 30.3 mm

$ 140.57

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12.03ct Multicolor Labradorite, Pear Shape, Translucent

12.03ct Multicolor Labradorite, Pear Shape, Translucent

18 x 13 mm (calibrated)

$ 26.60

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20.87ctw Multicolor Fossil Coral, Oval, Opaque

20.87ctw Multicolor Fossil Coral, Oval, Opaque

19.9 x 12.1 mm

$ 26.98

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10.68ct Multicolor Pietersite, Oval, Opaque

10.68ct Multicolor Pietersite, Oval, Opaque

18 x 13 mm (calibrated)

$ 46.80

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7.15ct Yellow Apatite, Pear Shape, VS
Apatite Product Video (384013)

7.15ct Yellow Apatite, Pear Shape, VS

14 x 11.5 mm

$ 235.01

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0.97ct Yellow Color-Change Diaspore, Pear Shape, VVS

0.97ct Yellow Color-Change Diaspore, Pear Shape, VVS

9.3 x 4.2 mm

$ 51.20

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1.48ct Yellow Beryl, Round, VVS

1.48ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 32.43

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8.14ctw Pink Rose Quartz, Emerald Cut, Transparent

8.14ctw Pink Rose Quartz, Emerald Cut, Transparent

9.6 x 9.5 mm

$ 44.59

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0.95ct Orange Hessonite Garnet, Round, VS

0.95ct Orange Hessonite Garnet, Round, VS

5.7 mm

$ 14.51

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0.96ct Orange Zircon, Oval, VVS

0.96ct Orange Zircon, Oval, VVS

5.8 x 4.8 mm

$ 11.95

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6.63ct Pink Kunzite, Oval, VVS

6.63ct Pink Kunzite, Oval, VVS

11.2 x 10 mm

$ 165.09

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4.61ct Multicolor Fire Agate, Fancy, Opaque

4.61ct Multicolor Fire Agate, Fancy, Opaque

10.5 x 8.7 mm

$ 36.16

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2.47ctw Orange Sunstone, Oval, Translucent

2.47ctw Orange Sunstone, Oval, Translucent

5.9 x 4.2 mm

$ 18.94

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1.52ctw Blue Kyanite, Oval, VS-SI

1.52ctw Blue Kyanite, Oval, VS-SI

5 x 3.1 mm

$ 33.31

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2.96ct Yellow Citrine, Cushion, VVS-VS

2.96ct Yellow Citrine, Cushion, VVS-VS

11.8 x 6.8 mm

$ 22.70

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

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Easy picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

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