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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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0.45ct Multicolor Opal, Pear Shape, Transparent

0.45ct Multicolor Opal, Pear Shape, Transparent

7 x 5 mm (calibrated)

$ 11.21

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3.32ct Blue Chalcedony, Oval, Transparent

3.32ct Blue Chalcedony, Oval, Transparent

11 x 9 mm (calibrated)

$ 6.62

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36.84ctw Gray Hematite, Emerald Cut, Opaque

36.84ctw Gray Hematite, Emerald Cut, Opaque

20 x 15 mm (calibrated)

$ 32.66

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8.91ct Multicolor Agate, Oval, Opaque

8.91ct Multicolor Agate, Oval, Opaque

14 x 12 mm (calibrated)

$ 8.42

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4.91ct Yellow Citrine, Oval, VVS

4.91ct Yellow Citrine, Oval, VVS

12.8 x 10.1 mm

$ 29.75

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1.49ct Red Pyrope Garnet, Fancy, VS

1.49ct Red Pyrope Garnet, Fancy, VS

9 x 3.4 mm

$ 17.84

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5.61ctw Yellow Citrine, Oval, VVS-VS

5.61ctw Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 30.73

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2.58ct Orange Hessonite Garnet, Emerald Cut, SI

2.58ct Orange Hessonite Garnet, Emerald Cut, SI

9 x 7 mm (calibrated)

$ 46.51

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0.90ct Yellow Citrine, Trillion, VS

0.90ct Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 6.91

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2.53ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

2.53ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

7.1 x 4.6 mm

$ 7.98

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1.66ct Pink Tourmaline, Emerald Cut, VVS-VS

1.66ct Pink Tourmaline, Emerald Cut, VVS-VS

8.6 x 5.6 mm

$ 120.03

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1.00ct Purple Spinel, Cushion, VS
Spinel Product Video (720488)

1.00ct Purple Spinel, Cushion, VS

6.5 x 5.4 mm

$ 149.40

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2.36ct Orange Moonstone, Cushion, Translucent

2.36ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 4.70

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2.26ct Red Coral, Oval, Opaque
Coral Product Video (499205)

2.26ct Red Coral, Oval, Opaque

12.7 x 5 mm

$ 371.41

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7.10ct Brown Tiger'S Eye, Baguette, Opaque

7.10ct Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 7.07

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1.76ctw Orange Sunstone, Round, Translucent

1.76ctw Orange Sunstone, Round, Translucent

6 mm (calibrated)

$ 19.28

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2.53ct Pink Kunzite, Cushion, VS

2.53ct Pink Kunzite, Cushion, VS

8.6 x 6 mm

$ 63.00

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4.43ctw White Topaz, Cushion, VVS-VS

4.43ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 24.27

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0.60ct Red Pyrope Garnet, Heart, VS

0.60ct Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 4.78

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60.40ct Multicolor Agate, Fancy, Opaque

60.40ct Multicolor Agate, Fancy, Opaque

25.3 x 15.3 mm

$ 105.78

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4.28ct Red Almandine Garnet, Oval, VS

4.28ct Red Almandine Garnet, Oval, VS

11.5 x 9 mm

$ 149.20

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2.06ctw Multicolor Andalusite, Round, VS

2.06ctw Multicolor Andalusite, Round, VS

4 mm (calibrated)

$ 101.56

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3.33ctw White Topaz, Cushion, VVS-VS

3.33ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 18.24

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1.21ct Multicolor Opal, Oval, Transparent/Translucent

1.21ct Multicolor Opal, Oval, Transparent/Translucent

9.4 x 6.6 mm

$ 53.03

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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

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
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
Source: Bizrate

Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate
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