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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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0.94ct Yellow Color-Change Diaspore, Pear Shape, VS

0.94ct Yellow Color-Change Diaspore, Pear Shape, VS

8.4 x 5.5 mm

$ 50.09

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6.10ctw Yellow Citrine, Square, VS

6.10ctw Yellow Citrine, Square, VS

6 x 6 mm (calibrated)

$ 27.85

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0.89ct Green Peridot, Oval, VS-SI

0.89ct Green Peridot, Oval, VS-SI

7.2 x 5.2 mm

$ 12.41

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4.68ct Green Prehnite, Fancy, Translucent

4.68ct Green Prehnite, Fancy, Translucent

12.6 x 9.5 mm

$ 7.69

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3.23ctw Orange Moonstone, Trillion, Translucent

3.23ctw Orange Moonstone, Trillion, Translucent

8 x 8 mm (calibrated)

$ 7.08

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6.11ctw White Moonstone, Round, Translucent

6.11ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 16.73

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0.51ct Purple Spinel, Baguette, VVS-VS

0.51ct Purple Spinel, Baguette, VVS-VS

8 x 3.2 mm

$ 61.20

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2.86ct Violet Amethyst, Trillion, VS

2.86ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.43

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2.36ctw Orange Hessonite Garnet, Emerald Cut, VS

2.36ctw Orange Hessonite Garnet, Emerald Cut, VS

7 x 5 mm (calibrated)

$ 36.06

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0.75ct White Rainbow Moonstone, Baguette, Transparent

0.75ct White Rainbow Moonstone, Baguette, Transparent

7 x 5 mm (calibrated)

$ 26.15

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1.93ctw Red Citrine, Heart, VS

1.93ctw Red Citrine, Heart, VS

7 x 7 mm (calibrated)

$ 16.02

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3.58ctw Brown Smoky Quartz, Round, VS

3.58ctw Brown Smoky Quartz, Round, VS

8 mm (calibrated)

$ 7.85

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0.83ct Purple Spinel, Cushion, VS

0.83ct Purple Spinel, Cushion, VS

5.9 x 5.1 mm

$ 41.02

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0.62ct Orange Zircon, Oval, VVS

0.62ct Orange Zircon, Oval, VVS

5.3 x 4.1 mm

$ 9.26

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1.32ct Orange Hessonite Garnet, Oval, VS

1.32ct Orange Hessonite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 26.29

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2.31ctw Yellow Beryl, Trillion, VVS

2.31ctw Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 46.02

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2.45ct Pink Strawberry Quartz, Oval, Transparent

2.45ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 12.20

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1.83ct Multicolor Spectrolite, Round, Opaque

1.83ct Multicolor Spectrolite, Round, Opaque

8.5 mm (calibrated)

$ 6.84

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44.33ctw Brown Tiger'S Eye, Fancy, Opaque

44.33ctw Brown Tiger'S Eye, Fancy, Opaque

32.4 x 9.1 mm

$ 24.29

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7.26ct Brown Star Moonstone, Oval, Translucent

7.26ct Brown Star Moonstone, Oval, Translucent

11.9 x 9.4 mm

$ 31.81

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1.76ct Green Tourmaline, Round, Transparent

1.76ct Green Tourmaline, Round, Transparent

7 mm (calibrated)

$ 29.17

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7.28ctw White Moonstone, Round, Translucent

7.28ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 19.94

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0.75ct Gray Sillimanite Cat'S Eye, Oval, Transparent

0.75ct Gray Sillimanite Cat'S Eye, Oval, Transparent

6.4 x 4.5 mm

$ 2.47

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11.89ct Green Druzy Variscite, Trillion, Opaque

11.89ct Green Druzy Variscite, Trillion, Opaque

29.4 x 21 mm

$ 50.45

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 -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
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Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
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Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
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Overall Rating -> 10 star ratings

I am filling a small treasure chest and picked a nice amethyst.

Posted By VinnyD in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate
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