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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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Untreated Gemstones Treatment

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7.29ct Black Star Diopside, Oval, Opaque

7.29ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 36.30

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1.06ct Violet Amethyst, Square, VS

1.06ct Violet Amethyst, Square, VS

6 x 6 mm (calibrated)

$ 8.45

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25.41ct White Rainbow Moonstone, Pear Shape, Translucent

25.41ct White Rainbow Moonstone, Pear Shape, Translucent

27.6 x 19.2 mm

$ 177.16

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30.58ctw Multicolor Fossil Coral, Oval, Opaque
Fossil Coral Product Video (514172)

30.58ctw Multicolor Fossil Coral, Oval, Opaque

23.1 x 13.6 mm

$ 66.34

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23.89ct White Howlite, Cushion, Opaque

23.89ct White Howlite, Cushion, Opaque

26.9 x 17.6 mm

$ 11.90

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1.66ct Green Tourmaline, Emerald Cut, VVS-VS

1.66ct Green Tourmaline, Emerald Cut, VVS-VS

18.5 x 3.1 mm

$ 35.42

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2.90ctw Red Spessartite Garnet, Oval, VVS-VS

2.90ctw Red Spessartite Garnet, Oval, VVS-VS

4.7 x 3.9 mm

$ 136.37

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2.02ct Green Tourmaline, Emerald Cut, VVS

2.02ct Green Tourmaline, Emerald Cut, VVS

26.8 x 3.3 mm

$ 50.30

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24.03ct Green Bloodstone, Oval, Opaque

24.03ct Green Bloodstone, Oval, Opaque

23.3 x 18.2 mm

$ 35.91

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8.11ctw Pink Morganite, Round, Translucent

8.11ctw Pink Morganite, Round, Translucent

10 mm (calibrated)

$ 88.85

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5.76ct Pink Strawberry Quartz, Oval, Translucent

5.76ct Pink Strawberry Quartz, Oval, Translucent

12 x 10 mm (calibrated)

$ 34.71

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0.93ct Orange Zircon, Oval, VS

0.93ct Orange Zircon, Oval, VS

5.9 x 4.9 mm

$ 23.16

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3.05ct Violet Amethyst, Trillion, VS

3.05ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 16.72

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8.03ct Yellow Rutile Quartz, Pear Shape, Transparent

8.03ct Yellow Rutile Quartz, Pear Shape, Transparent

15 x 11 mm

$ 21.81

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7.06ctw Black Spinel, Round, Opaque

7.06ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 30.93

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32.39ct Multicolor Labradorite, Oval, Opaque

32.39ct Multicolor Labradorite, Oval, Opaque

31.7 x 20.4 mm

$ 29.03

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4.99ctw Orange Sunstone, Oval, Translucent

4.99ctw Orange Sunstone, Oval, Translucent

10 x 8 mm (calibrated)

$ 38.26

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3.09ct Yellow Citrine, Oval, VVS-VS

3.09ct Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 23.70

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3.35ct White Dendritic Agate, Pear Shape, Opaque

3.35ct White Dendritic Agate, Pear Shape, Opaque

13 x 9 mm (calibrated)

$ 2.67

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1.37ct Brown Color-Change Garnet, Oval, VS

1.37ct Brown Color-Change Garnet, Oval, VS

6.8 x 5.7 mm

$ 109.45

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3.12ctw Green Tsavorite Garnet, Pear Shape, VS

3.12ctw Green Tsavorite Garnet, Pear Shape, VS

5.2 x 3 mm

$ 164.53

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7.32ct Yellow Calcite, Pear Shape, Translucent

7.32ct Yellow Calcite, Pear Shape, Translucent

25.2 x 10.8 mm

$ 5.03

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2.57ctw Orange Hessonite Garnet, Square, VS

2.57ctw Orange Hessonite Garnet, Square, VS

6 x 6 mm (calibrated)

$ 56.32

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.27

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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

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate

Overall Rating -> 7 star ratings

easy interface for a pricless buy

Posted By Zeak in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate
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