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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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20.29ct Violet Amethyst, Emerald Cut, VVS

20.29ct Violet Amethyst, Emerald Cut, VVS

18.5 x 14.5 mm

$ 141.47

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1.96ctw Multicolor Opal, Round, Transparent

1.96ctw Multicolor Opal, Round, Transparent

5 mm (calibrated)

$ 45.77

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0.59ct Purple Spinel, Oval, VS

0.59ct Purple Spinel, Oval, VS

5.9 x 4.3 mm

$ 32.32

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1.21ctw Green Demantoid Garnet, Oval, VS

1.21ctw Green Demantoid Garnet, Oval, VS

4.3 x 3.5 mm

$ 132.57

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0.34ct Blue Kyanite, Round, SI

0.34ct Blue Kyanite, Round, SI

4 mm (calibrated)

$ 8.47

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19.67ct Blue Druzy Azurite, Fancy, Opaque

19.67ct Blue Druzy Azurite, Fancy, Opaque

22.8 x 21 mm

$ 63.09

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3.59ct Red Almandine Garnet, Oval, VVS

3.59ct Red Almandine Garnet, Oval, VVS

11 x 9 mm (calibrated)

$ 134.09

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1.87ct Multicolor Tourmaline, Emerald Cut, VVS
Tourmaline Product Video (744061)

1.87ct Multicolor Tourmaline, Emerald Cut, VVS

8.1 x 5.5 mm

$ 419.07

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0.59ct Pink Spinel, Round, VVS-VS

0.59ct Pink Spinel, Round, VVS-VS

5 mm (calibrated)

$ 44.07

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1.40ct Green Tourmaline, Emerald Cut, VVS-VS

1.40ct Green Tourmaline, Emerald Cut, VVS-VS

21.9 x 3 mm

$ 26.63

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2.39ctw Red Pyrope Garnet, Marquise, VVS-VS

2.39ctw Red Pyrope Garnet, Marquise, VVS-VS

9.9 x 5 mm

$ 20.95

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7.81ct Multicolor Coral, Oval, Translucent

7.81ct Multicolor Coral, Oval, Translucent

16.7 x 13.2 mm

$ 24.39

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12.48ct Purple Kunzite, Cushion, VVS-VS
Kunzite Product Video (453522)

12.48ct Purple Kunzite, Cushion, VVS-VS

19.2 x 9.9 mm

$ 273.46

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10.57ct Brown Tiger'S Eye, Oval, Opaque

10.57ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 10.52

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6.67ctw Multicolor Opal, Round, Transparent
Opal Product Video (466299)

6.67ctw Multicolor Opal, Round, Transparent

8 mm (calibrated)

$ 186.01

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7.71ct Brown Tiger'S Eye Matrix, Sphere / Ball, Opaque
Tiger's Eye Matrix Product Video (526455)

7.71ct Brown Tiger'S Eye Matrix, Sphere / Ball, Opaque

10 mm (calibrated)

$ 7.74

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15.81ct Green Bloodstone, Oval, Opaque

15.81ct Green Bloodstone, Oval, Opaque

16 x 12 mm (calibrated)

$ 31.49

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1.96ctw Yellow Citrine, Marquise, VS

1.96ctw Yellow Citrine, Marquise, VS

9 x 4.9 mm

$ 10.74

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2.75ct Green Fluorite, Pear Shape, Transparent

2.75ct Green Fluorite, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 11.29

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11.98ct Multicolor Quartz With Marcasite, Oval, Transparent

11.98ct Multicolor Quartz With Marcasite, Oval, Transparent

18.6 x 13.7 mm

$ 76.65

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3.61ct Yellow Citrine, Emerald Cut, VVS

3.61ct Yellow Citrine, Emerald Cut, VVS

10.5 x 10.2 mm

$ 19.78

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1.35ct Green Tourmaline, Emerald Cut, VVS-VS

1.35ct Green Tourmaline, Emerald Cut, VVS-VS

16.4 x 3.2 mm

$ 28.55

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3.02ct Yellow Citrine, Oval, VVS

3.02ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 21.06

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2.01ct Red Almandine Garnet, Oval, VVS-VS

2.01ct Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 75.07

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

Posted By Trouble in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate
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