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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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4.77ct Yellow Citrine, Oval, VVS-VS

4.77ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 38.01

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5.33ct Violet Amethyst, Pear Shape, VVS

5.33ct Violet Amethyst, Pear Shape, VVS

15.5 x 10.9 mm

$ 37.16

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8.71ct Green Uvarovite Garnet Drusy, Fancy, Opaque

8.71ct Green Uvarovite Garnet Drusy, Fancy, Opaque

18 x 12.1 mm

$ 13.01

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22.38ctw Green Prehnite, Flower Cut, Transparent

22.38ctw Green Prehnite, Flower Cut, Transparent

16.2 x 10.6 mm

$ 33.83

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1.63ct Green Tourmaline, Emerald Cut, VVS-VS

1.63ct Green Tourmaline, Emerald Cut, VVS-VS

17.8 x 3.4 mm

$ 34.79

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25.34ctw Black Spinel, Baguette, Opaque

25.34ctw Black Spinel, Baguette, Opaque

17.7 x 8.2 mm

$ 182.22

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39.89ct Blue Turquoise, Oval, Opaque
Turquoise Product Video (709316)

39.89ct Blue Turquoise, Oval, Opaque

23.8 x 18.8 mm

$ 119.19

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1.57ct Orange Hessonite Garnet, Cushion, VVS-VS

1.57ct Orange Hessonite Garnet, Cushion, VVS-VS

7 x 5 mm (calibrated)

$ 31.27

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2.96ct Violet Amethyst, Trillion, VVS-VS

2.96ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 20.63

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2.80ctw Red Pyrope Garnet, Marquise, VVS-VS

2.80ctw Red Pyrope Garnet, Marquise, VVS-VS

10.2 x 5.1 mm

$ 24.54

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2.03ctw Yellow Citrine, Trillion, VS

2.03ctw Yellow Citrine, Trillion, VS

7 x 7 mm (calibrated)

$ 11.12

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7.00ctw White Topaz, Round, VVS-VS
Topaz Product Video (389200)

7.00ctw White Topaz, Round, VVS-VS

9 mm (calibrated)

$ 33.37

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4.56ct Violet Amethyst, Pear Shape, VS

4.56ct Violet Amethyst, Pear Shape, VS

15 x 10 mm (calibrated)

$ 29.98

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5.03ct Brown Smoky Quartz, Round, VVS-VS

5.03ct Brown Smoky Quartz, Round, VVS-VS

12 mm (calibrated)

$ 16.53

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2.06ctw Orange Zircon, Oval, VVS

2.06ctw Orange Zircon, Oval, VVS

6.1 x 4.9 mm

$ 51.29

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1.24ct Green Peridot, Oval, VS

1.24ct Green Peridot, Oval, VS

7.4 x 5.6 mm

$ 13.59

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1.08ct Pink Tourmaline, Pear Shape, VVS-VS

1.08ct Pink Tourmaline, Pear Shape, VVS-VS

6.7 x 6.5 mm

$ 150.60

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2.71ct Violet Amethyst, Trillion, VS

2.71ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 14.85

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10.64ct Pink Cat'S Eye Tourmaline, Oval, Translucent
Cat's Eye Tourmaline Product Video (752655)

10.64ct Pink Cat'S Eye Tourmaline, Oval, Translucent

13.5 x 10.5 mm

$ 1,589.62

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3.72ct Yellow Citrine, Oval, VVS-VS

3.72ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 25.94

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5.53ctw Violet Amethyst, Oval, Transparent

5.53ctw Violet Amethyst, Oval, Transparent

10 x 8 mm (calibrated)

$ 30.30

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3.56ctw Brown Smoky Quartz, Round, VVS-VS

3.56ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 15.60

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50.90ct Violet Amethyst, Oval, IF
Amethyst Product Video (751297)

50.90ct Violet Amethyst, Oval, IF

27 x 20 mm (calibrated)

$ 337.98

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33.26ct Blue Turquoise, Oval, Opaque

33.26ct Blue Turquoise, Oval, Opaque

27.8 x 17.8 mm

$ 99.38

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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

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website was very easy to use.

Posted By Garnet in January, 2026
Source: Bizrate

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

Good selection, using for custom jewlery for my wife.

Posted By Smitty in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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