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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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11.09ct Multicolor Boulder Opal, Trillion, Translucent

11.09ct Multicolor Boulder Opal, Trillion, Translucent

20.3 x 16.2 mm

$ 46.02

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2.85ct Violet Amethyst, Trillion, VVS

2.85ct Violet Amethyst, Trillion, VVS

10 x 10 mm (calibrated)

$ 22.71

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13.82ct Multicolor Pietersite, Pear Shape, Opaque

13.82ct Multicolor Pietersite, Pear Shape, Opaque

28.3 x 13.4 mm

$ 34.41

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2.36ctw Green Tsavorite Garnet, Square, VVS-VS
Tsavorite Garnet Product Video (346282)

2.36ctw Green Tsavorite Garnet, Square, VVS-VS

2.2 x 2.2 mm

$ 219.78

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5.78ct Yellow Citrine, Pear Shape, VVS

5.78ct Yellow Citrine, Pear Shape, VVS

18.2 x 9.8 mm

$ 38.00

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1.73ct Green Tourmaline, Oval, VVS

1.73ct Green Tourmaline, Oval, VVS

7.3 x 6.9 mm

$ 201.03

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1.08ct Yellow Color-Change Diaspore, Cushion, VS

1.08ct Yellow Color-Change Diaspore, Cushion, VS

7.2 x 5.2 mm

$ 51.71

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35.91ct Multicolor Jasper, Pear Shape, Opaque

35.91ct Multicolor Jasper, Pear Shape, Opaque

28.9 x 23.8 mm

$ 25.18

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4.30ctw Red Pyrope Garnet, Marquise, VVS-VS

4.30ctw Red Pyrope Garnet, Marquise, VVS-VS

12.1 x 6.1 mm

$ 47.25

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4.07ctw Red Pyrope Garnet, Square, VVS-VS

4.07ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 31.22

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1.81ct Red Almandine Garnet, Oval, VS

1.81ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 67.60

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1.45ctw Red Rhodolite Garnet, Square, VVS-VS

1.45ctw Red Rhodolite Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 12.70

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4.36ctw White Topaz, Cushion, VVS-VS

4.36ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 23.89

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6.98ct Black Star Diopside, Oval, Opaque

6.98ct Black Star Diopside, Oval, Opaque

12 x 10 mm (calibrated)

$ 34.76

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3.28ct Yellow Citrine, Oval, VVS-VS

3.28ct Yellow Citrine, Oval, VVS-VS

12.3 x 9.3 mm

$ 19.87

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10.60ct Multicolor Labradorite, Baguette, Translucent

10.60ct Multicolor Labradorite, Baguette, Translucent

16 x 12 mm (calibrated)

$ 13.59

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14.06ct Green Maw-Sit-Sit, Oval, Opaque

14.06ct Green Maw-Sit-Sit, Oval, Opaque

14.9 x 13 mm

$ 46.21

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45.90ct Multicolor Rhodonite, Oval, Opaque

45.90ct Multicolor Rhodonite, Oval, Opaque

33.7 x 24.8 mm

$ 26.51

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4.03ct Yellow Citrine, Oval, VVS

4.03ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 32.10

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0.99ct Yellow Morganite, Oval, VS

0.99ct Yellow Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 43.38

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23.57ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

23.57ct Multicolor Tiger'S Eye Matrix, Baguette, Opaque

21.9 x 16.6 mm

$ 10.80

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24.31ct Green Aventurine, Round, Opaque

24.31ct Green Aventurine, Round, Opaque

20 mm (calibrated)

$ 29.56

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1.48ct Yellow Citrine, Round, VVS

1.48ct Yellow Citrine, Round, VVS

8 mm (calibrated)

$ 11.79

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2.83ct Green Tourmaline, Emerald Cut, VS

2.83ct Green Tourmaline, Emerald Cut, VS

19.2 x 4 mm

$ 77.52

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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

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 -> 10 star ratings

Love, and have always loved, your website.

Posted By Aberabic 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

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well

Posted By Marti 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
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