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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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1.02ct Blue Kyanite, Oval, SI

1.02ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 25.40

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8.96ct Purple Kunzite, Oval, VS
Kunzite Product Video (453577)

8.96ct Purple Kunzite, Oval, VS

16.7 x 9.2 mm

$ 245.41

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12.20ct Multicolor Ruby-Zoisite, Baguette, Opaque

12.20ct Multicolor Ruby-Zoisite, Baguette, Opaque

16.2 x 10.3 mm

$ 33.42

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3.52ct Yellow Citrine, Oval, VS

3.52ct Yellow Citrine, Oval, VS

12.4 x 9.3 mm

$ 21.33

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1.35ctw Green Demantoid Garnet, Oval, VS-SI

1.35ctw Green Demantoid Garnet, Oval, VS-SI

4.7 x 3.9 mm

$ 134.46

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4.89ct Brown Smoky Quartz, Round, VVS

4.89ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 16.08

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4.18ctw Green Peridot, Round, VS

4.18ctw Green Peridot, Round, VS

5.7 mm

$ 40.85

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6.40ct Green Prehnite, Fancy, Translucent

6.40ct Green Prehnite, Fancy, Translucent

15 x 10.5 mm

$ 10.52

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3.46ct Yellow Apatite, Pear Shape, VS

3.46ct Yellow Apatite, Pear Shape, VS

12.3 x 8.6 mm

$ 113.73

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1.26ct Multicolor Labradorite, Round, Translucent

1.26ct Multicolor Labradorite, Round, Translucent

7 mm (calibrated)

$ 2.71

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74.53ct Multicolor Ruby-Zoisite, Oval, Opaque
Ruby-Zoisite Product Video (335061)

74.53ct Multicolor Ruby-Zoisite, Oval, Opaque

24.8 x 21.5 mm

$ 148.46

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2.63ctw Red Pyrope Garnet, Square, VVS-VS

2.63ctw Red Pyrope Garnet, Square, VVS-VS

4 x 4 mm (calibrated)

$ 20.17

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1.22ct Red Strawberry Quartz, Oval, Transparent

1.22ct Red Strawberry Quartz, Oval, Transparent

8.5 x 6.7 mm

$ 7.85

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1.45ct Yellow Citrine, Oval, VS

1.45ct Yellow Citrine, Oval, VS

8.6 x 6.9 mm

$ 7.95

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0.70ct Orange Zircon, Oval, VVS

0.70ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 10.46

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1.65ct Orange Hessonite Garnet, Oval, VS

1.65ct Orange Hessonite Garnet, Oval, VS

8.2 x 6.6 mm

$ 49.15

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1.32ct Multicolor Tourmaline, Emerald Cut, VVS-VS
Tourmaline Product Video (744048)

1.32ct Multicolor Tourmaline, Emerald Cut, VVS-VS

7.7 x 5 mm

$ 295.81

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4.84ct Brown Smoky Quartz, Round, VVS-VS

4.84ct Brown Smoky Quartz, Round, VVS-VS

11.5 mm

$ 7.96

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1.30ct Brown Sillimanite Cat'S Eye, Oval, Transparent

1.30ct Brown Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 3.88

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3.98ct Yellow Citrine, Oval, VVS

3.98ct Yellow Citrine, Oval, VVS

11.5 x 8.4 mm

$ 24.11

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0.43ct Orange Clinohumite, Round, SI

0.43ct Orange Clinohumite, Round, SI

5 mm (calibrated)

$ 17.85

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2.87ct Green Prehnite, Oval, Transparent

2.87ct Green Prehnite, Oval, Transparent

8.3 x 7.2 mm

$ 15.47

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8.92ct White Agate, Oval, Opaque

8.92ct White Agate, Oval, Opaque

19 x 13.3 mm

$ 14.13

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1.08ct Purple Rhodolite Garnet, Oval, VS

1.08ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 28.68

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

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
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Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
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Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate
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