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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
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1.64ctw Green Peridot, Oval, VS

1.64ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.44

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20.50ct Multicolor Obsidian, Round, Opaque

20.50ct Multicolor Obsidian, Round, Opaque

21.7 mm

$ 17.30

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6.81ct Violet Amethyst, Fancy, Transparent

6.81ct Violet Amethyst, Fancy, Transparent

12.1 x 10.6 mm

$ 33.91

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1.72ct Green Tourmaline, Emerald Cut, VVS-VS

1.72ct Green Tourmaline, Emerald Cut, VVS-VS

19.7 x 3.1 mm

$ 56.53

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5.60ct Yellow Citrine, Oval, VVS-VS

5.60ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 33.62

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0.73ct Red Pyrope Garnet, Pear Shape, VVS-VS

0.73ct Red Pyrope Garnet, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 5.82

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1.77ct White Rainbow Moonstone, Emerald Cut, VVS-VS

1.77ct White Rainbow Moonstone, Emerald Cut, VVS-VS

8.6 x 6.4 mm

$ 184.78

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7.47ctw Green Prehnite, Oval, Transparent

7.47ctw Green Prehnite, Oval, Transparent

11.4 x 8.7 mm

$ 13.64

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1.56ct Purple Spinel, Oval, VS

1.56ct Purple Spinel, Oval, VS

7.7 x 5.9 mm

$ 86.29

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1.53ct Red Almandine Garnet, Baguette, VVS

1.53ct Red Almandine Garnet, Baguette, VVS

10 x 5.1 mm

$ 57.15

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11.63ctw Violet Amethyst, Oval, Transparent

11.63ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 63.71

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 10.27

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4.40ct Multicolor Labradorite, Pear Shape, Translucent

4.40ct Multicolor Labradorite, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 9.73

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26.15ct Violet Amethyst, Round, VVS

26.15ct Violet Amethyst, Round, VVS

20 mm (calibrated)

$ 182.32

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34.89ct Multicolor Coral, Pear Shape, Opaque

34.89ct Multicolor Coral, Pear Shape, Opaque

33.2 x 23.5 mm

$ 51.23

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4.10ct Yellow Citrine, Oval, VVS-VS

4.10ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 31.44

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9.58ctw Black Spinel, Round, Opaque

9.58ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 36.74

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8.67ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

8.67ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

20.9 x 10.6 mm

$ 64.78

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2.01ct Orange Hessonite Garnet, Square, VS-SI

2.01ct Orange Hessonite Garnet, Square, VS-SI

7.4 x 7.3 mm

$ 44.04

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21.89ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

21.89ct Multicolor Ruby-Zoisite, Flower Cut, Opaque

16 x 16 mm (calibrated)

$ 26.60

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7.71ct Yellow Citrine, Oval, VVS-VS
Citrine Product Video (428064)

7.71ct Yellow Citrine, Oval, VVS-VS

15.7 x 11.4 mm

$ 46.07

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7.84ct Multicolor Labradorite, Round, Translucent

7.84ct Multicolor Labradorite, Round, Translucent

13 mm (calibrated)

$ 9.37

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0.63ct Purple Spinel, Round, VS

0.63ct Purple Spinel, Round, VS

5 mm (calibrated)

$ 28.99

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2.51ctw Red Pyrope Garnet, Marquise, VVS-VS

2.51ctw Red Pyrope Garnet, Marquise, VVS-VS

10.1 x 5.1 mm

$ 22.00

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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 can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.

Posted By Jac in July, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate
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