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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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2.39ctw Red Pyrope Garnet, Marquise, VVS-VS

2.39ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.1 mm

$ 20.95

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0.73ct Green Tourmaline, Emerald Cut, VS

0.73ct Green Tourmaline, Emerald Cut, VS

4.7 x 4.5 mm

$ 36.35

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6.18ct Brown Tiger'S Eye, Baguette, Opaque

6.18ct Brown Tiger'S Eye, Baguette, Opaque

12 x 10 mm (calibrated)

$ 6.16

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1.56ct Orange Hessonite Garnet, Oval, VS-SI

1.56ct Orange Hessonite Garnet, Oval, VS-SI

7.8 x 6.5 mm

$ 30.77

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1.64ct Pink Tourmaline, Emerald Cut, VS-SI

1.64ct Pink Tourmaline, Emerald Cut, VS-SI

11.4 x 4.2 mm

$ 123.99

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11.05ct Multicolor Rainbow Pyrite, Oval, Opaque

11.05ct Multicolor Rainbow Pyrite, Oval, Opaque

19 x 12.2 mm

$ 28.50

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1.34ct Yellow Beryl, Trillion, VVS

1.34ct Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 32.03

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3.11ctw Multicolor Tourmaline, Briolette, VS

3.11ctw Multicolor Tourmaline, Briolette, VS

5.7 x 3.5 mm

$ 46.46

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4.92ctw Green Peridot, Oval, VS

4.92ctw Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 53.90

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1.38ct Red Pyrope Garnet, Fancy, VS

1.38ct Red Pyrope Garnet, Fancy, VS

9.2 x 3.3 mm

$ 16.53

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0.66ct Orange Citrine, Oval, VVS-VS

0.66ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.57

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0.07ct Black Diamond, Round, Opaque

0.07ct Black Diamond, Round, Opaque

2.4 mm (calibrated)

$ 33.87

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0.22ctw Violet Iolite, Square, VVS-VS

0.22ctw Violet Iolite, Square, VVS-VS

2.7 x 2.6 mm

$ 8.76

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1.15ct Multicolor Opal, Oval, Transparent

1.15ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 36.17

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2.18ct Yellow Citrine, Flower Cut, Translucent

2.18ct Yellow Citrine, Flower Cut, Translucent

8.8 x 8.3 mm

$ 16.72

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1.00ctw Orange Citrine, Marquise, VVS-VS

1.00ctw Orange Citrine, Marquise, VVS-VS

8.3 x 4.2 mm

$ 5.98

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9.18ct Brown Tiger'S Eye, Oval, Opaque

9.18ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 5.40

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26.31ctw White Quartz, Pear Shape, Transparent
Quartz Product Video (501552)

26.31ctw White Quartz, Pear Shape, Transparent

40.6 x 12.6 mm

$ 86.70

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1.16ct Purple Rhodolite Garnet, Oval, VS

1.16ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 30.81

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1.86ct Yellow Citrine, Pear Shape, VS

1.86ct Yellow Citrine, Pear Shape, VS

8.3 x 9 mm

$ 14.26

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3.38ct Yellow Citrine, Oval, VVS-VS

3.38ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 23.56

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5.10ct Orange Sunstone, Oval, Translucent

5.10ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 30.46

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26.80ct Violet Amethyst, Round, VVS

26.80ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 186.85

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5.60ct Green Malachite, Oval, Opaque

5.60ct Green Malachite, Oval, Opaque

12 x 10 mm (calibrated)

$ 6.13

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

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
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I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
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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
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I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
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Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate
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