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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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0.37ct Pink Morganite, Trillion, VVS-VS

0.37ct Pink Morganite, Trillion, VVS-VS

5 x 4.8 mm

$ 16.58

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2.60ct Green Prehnite, Oval, Transparent/Translucent

2.60ct Green Prehnite, Oval, Transparent/Translucent

9.2 x 7.5 mm

$ 7.69

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1.18ct Pink Morganite, Oval, VS

1.18ct Pink Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 90.49

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3.83ctw Brown Smoky Quartz, Round, VVS-VS

3.83ctw Brown Smoky Quartz, Round, VVS-VS

8 mm (calibrated)

$ 6.28

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0.95ct Green Tourmaline, Emerald Cut, VVS

0.95ct Green Tourmaline, Emerald Cut, VVS

9.4 x 4.7 mm

$ 47.31

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2.75ct Violet Amethyst, Trillion, VVS-VS

2.75ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 21.91

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3.51ct Orange Sunstone, Oval, Transparent

3.51ct Orange Sunstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 21.12

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11.44ctw Multicolor Ruby In Fuchsite, Marquise, Translucent
Ruby in Fuchsite Product Video (386580)

11.44ctw Multicolor Ruby In Fuchsite, Marquise, Translucent

16 x 8 mm (calibrated)

$ 84.48

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39.59ct Multicolor Rainbow Moonstone, Fancy, Opaque

39.59ct Multicolor Rainbow Moonstone, Fancy, Opaque

40.9 x 11.6 mm

$ 3.94

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0.34ct Orange Spessartite Garnet, Oval, VS

0.34ct Orange Spessartite Garnet, Oval, VS

4.9 x 3.2 mm

$ 11.85

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0.33ct Green Kornerupine, Oval, VS-SI

0.33ct Green Kornerupine, Oval, VS-SI

4.9 x 3.7 mm

$ 28.27

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48.59ct Multicolor Jasper, Round, Opaque

48.59ct Multicolor Jasper, Round, Opaque

31.7 mm

$ 53.24

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4.88ctw Pink Strawberry Quartz, Oval, Transparent

4.88ctw Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 36.25

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3.26ct Yellow Citrine, Oval, VVS-VS

3.26ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 21.43

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3.61ct Green Prehnite, Pear Shape, Transparent/Translucent

3.61ct Green Prehnite, Pear Shape, Transparent/Translucent

12.3 x 8.4 mm

$ 7.91

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5.79ct Turquoise Aquamarine, Oval, Translucent
Aquamarine Product Video (729959)

5.79ct Turquoise Aquamarine, Oval, Translucent

16.1 x 9.7 mm

$ 120.14

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1.29ct Red Tourmaline, Oval, Transparent

1.29ct Red Tourmaline, Oval, Transparent

7.6 x 6 mm

$ 22.11

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7.53ctw Violet Amethyst, Oval, Transparent

7.53ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 41.25

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2.31ctw Yellow Golden Beryl, Oval, VS

2.31ctw Yellow Golden Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 63.28

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2.09ct Orange Hessonite Garnet, Oval, VS-SI

2.09ct Orange Hessonite Garnet, Oval, VS-SI

8.5 x 7 mm

$ 45.80

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0.62ct Green Tourmaline, Emerald Cut, VVS

0.62ct Green Tourmaline, Emerald Cut, VVS

8.4 x 3.4 mm

$ 15.44

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3.30ctw Yellow Citrine, Oval, VVS

3.30ctw Yellow Citrine, Oval, VVS

9 x 7 mm (calibrated)

$ 15.06

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10.67ct Multicolor Labradorite, Oval, Translucent

10.67ct Multicolor Labradorite, Oval, Translucent

18 x 13 mm (calibrated)

$ 23.37

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2.46ctw Red Pyrope Garnet, Marquise, VVS-VS

2.46ctw Red Pyrope Garnet, Marquise, VVS-VS

10 x 5 mm

$ 21.56

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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

Excellent options

Posted By CJ in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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