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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
Untreated Gemstones Price
Untreated Gemstones Treatment

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For Example: 6-7
For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
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Brown Untreated Gemstones
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Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.93ct Orange Sunstone, Oval, Translucent

0.93ct Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 6.48

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36.86ctw Green Seraphinite, Sphere / Ball, Opaque
Seraphinite Product Video (447350)

36.86ctw Green Seraphinite, Sphere / Ball, Opaque

14 mm (calibrated)

$ 60.57

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2.49ct Brown Smoky Quartz, Marquise, VVS

2.49ct Brown Smoky Quartz, Marquise, VVS

12.9 x 8 mm

$ 9.50

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1.07ct Pink Spinel, Cushion, VVS-VS
Spinel Product Video (720483)

1.07ct Pink Spinel, Cushion, VVS-VS

8 x 5 mm (calibrated)

$ 159.86

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0.51ct Green Peridot, Marquise, VS

0.51ct Green Peridot, Marquise, VS

8 x 4 mm (calibrated)

$ 7.62

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5.38ct White Topaz, Oval, VVS-VS
Topaz Product Video (384958)

5.38ct White Topaz, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 41.27

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13.63ct Green Prehnite, Fancy, Transparent

13.63ct Green Prehnite, Fancy, Transparent

16 x 12.8 mm

$ 23.60

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0.69ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.69ct Green Cat'S Eye Alexandrite, Oval, Opaque

6.3 x 4.4 mm

$ 143.18

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0.67ct Yellow Color-Change Diaspore, Marquise, VS

0.67ct Yellow Color-Change Diaspore, Marquise, VS

9.3 x 4.1 mm

$ 23.95

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17.29ct Violet Amethyst, Round, VVS

17.29ct Violet Amethyst, Round, VVS

18 mm (calibrated)

$ 120.55

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7.74ctw White Topaz, Square, VVS-VS

7.74ctw White Topaz, Square, VVS-VS

5 x 5 mm (calibrated)

$ 62.01

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6.54ct Pink Kunzite, Emerald Cut, VS

6.54ct Pink Kunzite, Emerald Cut, VS

13.3 x 7.9 mm

$ 172.62

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1.01ct Orange Hessonite Garnet, Pear Shape, VS-SI

1.01ct Orange Hessonite Garnet, Pear Shape, VS-SI

7.5 x 5.7 mm

$ 22.13

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2.98ctw Blue Kyanite, Oval, SI

2.98ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 62.03

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10.04ct Multicolor Agate, Oval, Opaque

10.04ct Multicolor Agate, Oval, Opaque

14 x 12 mm (calibrated)

$ 10.00

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32.78ct Multicolor Jasper, Fancy, Opaque

32.78ct Multicolor Jasper, Fancy, Opaque

39.4 x 10.6 mm

$ 9.79

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7.15ct Multicolor Agate, Round, Opaque

7.15ct Multicolor Agate, Round, Opaque

11 mm (calibrated)

$ 7.12

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1.30ct White Rainbow Moonstone, Round, Transparent

1.30ct White Rainbow Moonstone, Round, Transparent

7 mm (calibrated)

$ 24.21

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1.27ct Green Sphene, Oval, VS-SI

1.27ct Green Sphene, Oval, VS-SI

7.3 x 5.3 mm

$ 76.53

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3.96ct Brown Rutile Quartz, Round, Translucent

3.96ct Brown Rutile Quartz, Round, Translucent

11 mm (calibrated)

$ 9.94

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2.55ct Yellow Rutile Topaz, Heart, Transparent

2.55ct Yellow Rutile Topaz, Heart, Transparent

8.7 x 8.3 mm

$ 52.91

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10.29ct Pink Rose Quartz, Emerald Cut, Transparent

10.29ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 56.37

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1.27ctw White Rainbow Moonstone, Oval, Transparent

1.27ctw White Rainbow Moonstone, Oval, Transparent

7 x 5 mm (calibrated)

$ 23.66

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1.44ct Multicolor Opal, Oval, Transparent

1.44ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 35.86

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 whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I do enjoy this website and the wide selection. I would like to see more untreated stones. I also wasn't able to see my past order when I logged in.

Posted By Great selection, ok website in July, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 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
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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