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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
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Yellow Untreated Gemstones
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3.98ct Multicolor Labradorite, Pear Shape, Translucent

3.98ct Multicolor Labradorite, Pear Shape, Translucent

14 x 10 mm (calibrated)

$ 8.81

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1.76ct Multicolor Opal, Pear Shape, Translucent

1.76ct Multicolor Opal, Pear Shape, Translucent

12.2 x 8.4 mm

$ 82.92

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2.33ct Brown Tiger'S Eye, Oval, Opaque

2.33ct Brown Tiger'S Eye, Oval, Opaque

9 x 7 mm (calibrated)

$ 2.32

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1.40ctw Green Demantoid Garnet, Oval, VS

1.40ctw Green Demantoid Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 153.38

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28.40ct Black Snowflake Obsidian, Baguette, Opaque

28.40ct Black Snowflake Obsidian, Baguette, Opaque

25.5 x 17 mm

$ 18.67

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19.76ct Violet Amethyst, Round, VVS-VS

19.76ct Violet Amethyst, Round, VVS-VS

18 mm (calibrated)

$ 137.76

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0.93ct White Sillimanite Cat'S Eye, Oval, Transparent

0.93ct White Sillimanite Cat'S Eye, Oval, Transparent

7.4 x 4.7 mm

$ 3.58

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2.06ct Red Coral, Oval, Opaque
Coral Product Video (499203)

2.06ct Red Coral, Oval, Opaque

10.2 x 5.4 mm

$ 307.76

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13.78ctw Violet Amethyst, Oval, Transparent

13.78ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 75.49

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5.43ct Brown Cat'S Eye Scapolite, Oval, Translucent

5.43ct Brown Cat'S Eye Scapolite, Oval, Translucent

10.9 x 9.7 mm

$ 29.75

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6.65ct Turquoise Larimar, Pear Shape, Opaque
Larimar Product Video (674291)

6.65ct Turquoise Larimar, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 72.77

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3.62ctw Pink Malaya Garnet, Round, VS
Malaya Garnet Product Video (357769)

3.62ctw Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 118.45

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0.67ct Violet Spinel, Cushion, VVS-VS

0.67ct Violet Spinel, Cushion, VVS-VS

5.1 x 4.7 mm

$ 46.71

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21.52ct Green Malachite, Oval, Opaque

21.52ct Green Malachite, Oval, Opaque

20 x 15 mm (calibrated)

$ 17.86

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7.60ct Violet Amethyst, Pear Shape, VVS-VS

7.60ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 58.28

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9.66ct Multicolor Labradorite, Pear Shape, Translucent

9.66ct Multicolor Labradorite, Pear Shape, Translucent

16 x 12 mm (calibrated)

$ 21.36

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11.78ct Green Serpentine, Oval, Translucent

11.78ct Green Serpentine, Oval, Translucent

21.1 x 15.9 mm

$ 25.23

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3.22ctw Green Tsavorite Garnet, Oval, VS
Tsavorite Garnet Product Video (482355)

3.22ctw Green Tsavorite Garnet, Oval, VS

4.7 x 2.9 mm

$ 176.39

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1.53ct Green Tourmaline, Oval, VS

1.53ct Green Tourmaline, Oval, VS

7 x 7 mm (calibrated)

$ 177.79

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2.10ct Yellow Citrine, Trillion, VVS-VS

2.10ct Yellow Citrine, Trillion, VVS-VS

9 x 9 mm (calibrated)

$ 11.36

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4.06ct Yellow Citrine, Oval, VVS

4.06ct Yellow Citrine, Oval, VVS

12 x 10 mm (calibrated)

$ 32.35

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4.29ct Yellow Apatite, Emerald Cut, VS

4.29ct Yellow Apatite, Emerald Cut, VS

10 x 10 mm (calibrated)

$ 220.90

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28.10ct White Dendritic Agate, Oval, Opaque

28.10ct White Dendritic Agate, Oval, Opaque

27.9 x 17.5 mm

$ 55.98

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0.95ct Orange Hessonite Garnet, Oval, VS

0.95ct Orange Hessonite Garnet, Oval, VS

6.6 x 5.2 mm

$ 14.51

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 -> 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 -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 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

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate
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