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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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For Example: 8-9
Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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2.21ct Brown Smoky Quartz, Oval, VVS

2.21ct Brown Smoky Quartz, Oval, VVS

9.5 x 7.7 mm

$ 15.40

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0.68ct White Topaz, Oval, VVS

0.68ct White Topaz, Oval, VVS

6 x 4 mm (calibrated)

$ 3.93

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1.54ct Orange Hessonite Garnet, Oval, VVS-VS

1.54ct Orange Hessonite Garnet, Oval, VVS-VS

7.7 x 6.4 mm

$ 30.68

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1.40ct Pink Morganite, Pear Shape, VVS

1.40ct Pink Morganite, Pear Shape, VVS

9 x 7 mm (calibrated)

$ 122.71

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30.85ctw Multicolor Coral, Cushion, Opaque

30.85ctw Multicolor Coral, Cushion, Opaque

18.9 x 15.2 mm

$ 58.47

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2.71ct Violet Amethyst, Trillion, VVS-VS

2.71ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 21.60

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1.14ct Green Tourmaline, Baguette, VVS

1.14ct Green Tourmaline, Baguette, VVS

6.2 x 5.1 mm

$ 39.74

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1.35ct Red Pyrope Garnet, Marquise, VVS

1.35ct Red Pyrope Garnet, Marquise, VVS

11.9 x 5.9 mm

$ 14.83

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3.48ct Brown Rutile Quartz, Round, Transparent

3.48ct Brown Rutile Quartz, Round, Transparent

10 mm (calibrated)

$ 9.53

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2.48ct Orange Pyrope Garnet, Fancy, Translucent

2.48ct Orange Pyrope Garnet, Fancy, Translucent

12.2 x 9.1 mm

$ 6.23

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0.88ctw Yellow Citrine, Heart, VVS-VS

0.88ctw Yellow Citrine, Heart, VVS-VS

5.2 x 5.1 mm

$ 6.13

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2.78ctw Yellow Citrine, Emerald Cut, VVS-VS

2.78ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 21.32

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1.39ctw Blue Kyanite, Oval, SI

1.39ctw Blue Kyanite, Oval, SI

6.3 x 4.3 mm

$ 30.46

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5.52ct Violet Amethyst, Pear Shape, Transparent

5.52ct Violet Amethyst, Pear Shape, Transparent

13.4 x 9.7 mm

$ 32.98

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2.19ctw Orange Moonstone, Cushion, Translucent

2.19ctw Orange Moonstone, Cushion, Translucent

6 x 6 mm (calibrated)

$ 4.37

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4.12ct Violet Amethyst, Round, VVS-VS

4.12ct Violet Amethyst, Round, VVS-VS

11 mm (calibrated)

$ 27.08

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8.05ct Multicolor Pietersite, Oval, Opaque

8.05ct Multicolor Pietersite, Oval, Opaque

18.7 x 10.6 mm

$ 24.05

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4.94ctw Violet Amethyst, Oval, Transparent

4.94ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 27.06

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3.12ctw White Topaz, Cushion, VVS-VS

3.12ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 17.09

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1.89ct Orange Hessonite Garnet, Oval, VVS-VS

1.89ct Orange Hessonite Garnet, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 37.65

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1.61ct Green Tourmaline, Baguette, VS

1.61ct Green Tourmaline, Baguette, VS

13.8 x 3.5 mm

$ 56.12

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2.28ct Multicolor Spectrolite, Oval, Opaque

2.28ct Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 10.87

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0.91ct Pink Morganite, Pear Shape, VVS-VS

0.91ct Pink Morganite, Pear Shape, VVS-VS

9.5 x 5.2 mm

$ 54.84

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26.72ct Black Obsidian, Trillion, Opaque

26.72ct Black Obsidian, Trillion, Opaque

27.3 x 21.9 mm

$ 29.27

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 -> 10 star ratings

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
Source: Bizrate

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 -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 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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