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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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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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97.28ct Brown Tiger'S Eye, Square, Opaque

97.28ct Brown Tiger'S Eye, Square, Opaque

27.5 x 27.2 mm

$ 56.52

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5.68ct Brown Tiger'S Eye, Baguette, Opaque

5.68ct Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 5.66

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0.04ct Black Diamond, Round, Opaque

0.04ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 31.87

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2.71ctw Red Pyrope Garnet, Marquise, VVS-VS

2.71ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.2 mm

$ 23.75

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10.08ct Multicolor Bloodstone, Trillion, Opaque

10.08ct Multicolor Bloodstone, Trillion, Opaque

15 x 15 mm (calibrated)

$ 35.14

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17.73ctw Black Spinel, Heart, Opaque

17.73ctw Black Spinel, Heart, Opaque

13 x 13 mm (calibrated)

$ 58.27

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4.88ct Pink Strawberry Quartz, Oval, Translucent

4.88ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 29.40

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4.91ct Yellow Citrine, Oval, VVS

4.91ct Yellow Citrine, Oval, VVS

13.3 x 9.5 mm

$ 29.75

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3.81ctw Yellow Citrine, Pear Shape, VVS-VS

3.81ctw Yellow Citrine, Pear Shape, VVS-VS

8 x 5 mm (calibrated)

$ 22.79

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10.15ctw Multicolor Labradorite, Round, Translucent

10.15ctw Multicolor Labradorite, Round, Translucent

10 mm (calibrated)

$ 24.67

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31.89ct Pink Aragonite, Cushion, Opaque

31.89ct Pink Aragonite, Cushion, Opaque

30 x 22 mm (calibrated)

$ 37.32

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6.07ct Violet Amethyst, Pear Shape, VVS-VS

6.07ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 46.55

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10.99ct Green Rutile Quartz, Oval, Transparent

10.99ct Green Rutile Quartz, Oval, Transparent

19.3 x 12 mm

$ 21.78

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1.73ct Orange Hessonite Garnet, Cushion, VS-SI

1.73ct Orange Hessonite Garnet, Cushion, VS-SI

8 x 6 mm (calibrated)

$ 34.46

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6.72ct Yellow Star Moonstone, Oval, Translucent

6.72ct Yellow Star Moonstone, Oval, Translucent

15.7 x 10.4 mm

$ 29.45

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1.70ct Pink Morganite, Trillion, Transparent

1.70ct Pink Morganite, Trillion, Transparent

8 x 8 mm (calibrated)

$ 18.63

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1.54ct Yellow Citrine, Emerald Cut, VVS-VS

1.54ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 10.12

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0.73ct Green Chrome Diopside, Oval, VS

0.73ct Green Chrome Diopside, Oval, VS

6.7 x 4.8 mm

$ 18.18

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1.30ctw Orange Zircon, Oval, VS

1.30ctw Orange Zircon, Oval, VS

5.3 x 4.1 mm

$ 26.98

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3.41ct Yellow Apatite, Baguette, VS

3.41ct Yellow Apatite, Baguette, VS

12.4 x 7.3 mm

$ 112.08

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1.34ctw Red Pyrope Garnet, Square, VS

1.34ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 10.28

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0.86ct Pink Spinel, Cushion, VVS-VS

0.86ct Pink Spinel, Cushion, VVS-VS

5.6 x 4.9 mm

$ 30.74

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24.67ctw Multicolor Fossil Coral, Oval, Opaque

24.67ctw Multicolor Fossil Coral, Oval, Opaque

20 x 12.4 mm

$ 27.03

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7.50ctw Yellow Citrine, Pear Shape, VVS-VS

7.50ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 49.30

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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

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!

Posted By Orphanboy in December, 2025
Source: Bizrate

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 -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate
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