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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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4.10ctw Violet Amethyst, Oval, VVS-VS

4.10ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 22.46

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3.51ct Yellow Citrine, Oval, VS

3.51ct Yellow Citrine, Oval, VS

11.2 x 8.6 mm

$ 21.26

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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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1.59ct Multicolor Opal, Pear Shape, Translucent

1.59ct Multicolor Opal, Pear Shape, Translucent

10 x 8 mm (calibrated)

$ 34.84

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16.54ct Black Obsidian, Pear Shape, Opaque

16.54ct Black Obsidian, Pear Shape, Opaque

25.9 x 18.9 mm

$ 27.18

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8.78ct Green Bloodstone, Pear Shape, Opaque

8.78ct Green Bloodstone, Pear Shape, Opaque

14.8 x 12.1 mm

$ 33.66

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6.10ctw Brown Tiger'S Eye, Oval, Opaque

6.10ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 6.08

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2.00ct Orange Hessonite Garnet, Oval, VS-SI

2.00ct Orange Hessonite Garnet, Oval, VS-SI

8 x 6 mm (calibrated)

$ 35.86

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1.83ct Green Sphene, Oval, Transparent

1.83ct Green Sphene, Oval, Transparent

7.3 x 6.6 mm

$ 9.11

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1.01ctw Green Peridot, Marquise, VS

1.01ctw Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 16.09

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34.30ctw Multicolor Fossil Coral, Oval, Opaque

34.30ctw Multicolor Fossil Coral, Oval, Opaque

21.6 x 14.1 mm

$ 37.58

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1.03ct Purple Spinel, Cushion, VS

1.03ct Purple Spinel, Cushion, VS

6.6 x 5.6 mm

$ 72.48

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1.24ct Yellow Citrine, Emerald Cut, VVS

1.24ct Yellow Citrine, Emerald Cut, VVS

12.2 x 4.1 mm

$ 9.88

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0.82ct Yellow Citrine, Heart, VVS

0.82ct Yellow Citrine, Heart, VVS

8 x 8 mm (calibrated)

$ 5.72

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39.40ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

39.40ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

31.9 x 21.8 mm

$ 39.24

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4.12ct Multicolor Labradorite, Pear Shape, Translucent

4.12ct Multicolor Labradorite, Pear Shape, Translucent

11 x 9 mm (calibrated)

$ 9.11

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1.62ct Orange Hessonite Garnet, Oval, VS-SI

1.62ct Orange Hessonite Garnet, Oval, VS-SI

8.2 x 6.6 mm

$ 30.17

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0.69ct Yellow Beryl, Oval, VS

0.69ct Yellow Beryl, Oval, VS

7 x 5 mm (calibrated)

$ 13.74

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3.46ctw Yellow Sillimanite, Oval, VVS-VS

3.46ctw Yellow Sillimanite, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 77.78

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1.15ct Orange Hessonite Garnet, Round, VS

1.15ct Orange Hessonite Garnet, Round, VS

6 mm (calibrated)

$ 19.49

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4.37ct Violet Amethyst, Round, VVS-VS

4.37ct Violet Amethyst, Round, VVS-VS

11 mm (calibrated)

$ 28.73

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6.07ctw Bi-Color Tourmaline, Fancy, Transparent

6.07ctw Bi-Color Tourmaline, Fancy, Transparent

12 x 12 mm (calibrated)

$ 151.14

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10.18ct Green Jadeite, Oval, Translucent

10.18ct Green Jadeite, Oval, Translucent

18 x 14.6 mm

$ 33.46

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1.33ct Green Tourmaline, Emerald Cut, VS

1.33ct Green Tourmaline, Emerald Cut, VS

15.2 x 3.5 mm

$ 34.97

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

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

Posted By Emmanuel in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 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 -> 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

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate
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