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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
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14.07ct Green Fluorite, Oval, Transparent

14.07ct Green Fluorite, Oval, Transparent

20.1 x 9.7 mm

$ 30.83

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3.27ct Brown Rutile Quartz, Round, Transparent

3.27ct Brown Rutile Quartz, Round, Transparent

9 mm (calibrated)

$ 10.75

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11.86ct White Agate, Fancy, Opaque

11.86ct White Agate, Fancy, Opaque

21.5 x 14.3 mm

$ 18.78

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0.56ct Orange Spessartite Garnet, Oval, VS

0.56ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 19.52

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3.03ctw Brown Smoky Quartz, Round, VVS-VS

3.03ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 23.24

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0.78ct Green Tourmaline, Emerald Cut, VVS-VS

0.78ct Green Tourmaline, Emerald Cut, VVS-VS

9.2 x 3.4 mm

$ 38.84

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14.16ct Blue Color-Change Fluorite, Round, VVS-VS
Color-Change Fluorite Product Video (447652)

14.16ct Blue Color-Change Fluorite, Round, VVS-VS

15 mm (calibrated)

$ 387.84

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0.67ct Green Tourmaline, Round, Transparent

0.67ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 13.35

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2.62ct Orange Sunstone, Oval, Transparent

2.62ct Orange Sunstone, Oval, Transparent

10 x 8 mm (calibrated)

$ 19.96

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1.89ct Pink Tourmaline, Emerald Cut, VVS-VS
Tourmaline Product Video (512181)

1.89ct Pink Tourmaline, Emerald Cut, VVS-VS

13.2 x 4.3 mm

$ 142.88

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0.56ct Yellow Citrine, Trillion, VS

0.56ct Yellow Citrine, Trillion, VS

6 x 6 mm (calibrated)

$ 4.65

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3.54ct Pink Strawberry Quartz, Oval, Transparent

3.54ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 26.55

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3.23ct Red Almandine Garnet, Pear Shape, VVS

3.23ct Red Almandine Garnet, Pear Shape, VVS

12 x 8 mm (calibrated)

$ 120.64

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0.74ct Yellow Sphalerite, Round, SI

0.74ct Yellow Sphalerite, Round, SI

5 mm (calibrated)

$ 36.85

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11.60ct Green Maw-Sit-Sit, Round, Opaque

11.60ct Green Maw-Sit-Sit, Round, Opaque

13 mm (calibrated)

$ 25.41

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0.14ct Violet Iolite, Square, VVS

0.14ct Violet Iolite, Square, VVS

3 x 3 mm (calibrated)

$ 5.58

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1.07ctw White Topaz, Oval, VVS

1.07ctw White Topaz, Oval, VVS

6.3 x 4.2 mm

$ 7.46

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9.12ctw Yellow Citrine, Oval, VVS-VS

9.12ctw Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 54.76

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1.87ct Orange Zircon, Pear Shape, VVS

1.87ct Orange Zircon, Pear Shape, VVS

8.4 x 6.2 mm

$ 41.18

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20.39ct Brown Tiger'S Eye, Fancy, Opaque

20.39ct Brown Tiger'S Eye, Fancy, Opaque

31.5 x 8.9 mm

$ 10.16

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1.02ct Orange Zircon, Oval, VVS

1.02ct Orange Zircon, Oval, VVS

5.9 x 4.9 mm

$ 15.24

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1.79ct Orange Hessonite Garnet, Oval, VS-SI

1.79ct Orange Hessonite Garnet, Oval, VS-SI

8.1 x 6.6 mm

$ 26.69

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2.61ctw Green Peridot, Round, VVS-VS

2.61ctw Green Peridot, Round, VVS-VS

4.5 mm (calibrated)

$ 38.99

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1.25ct Pink Morganite, Round, VS

1.25ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 48.56

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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

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 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

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

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