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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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Yellow Untreated Gemstones
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2.98ctw Yellow Golden Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 71.83

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3.05ctw Yellow Citrine, Pear Shape, VVS

8 x 5 mm (calibrated)

$ 18.38

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0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.27

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1.01ctw Red Pyrope Garnet, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 8.05

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5.18ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 28.38

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28.18ct Brown Smoky Quartz, Oval, Transparent

31.7 x 19.3 mm

$ 46.31

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1.06ct White Sillimanite Cat'S Eye, Oval, Transparent

6.7 x 4.6 mm

$ 4.07

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44.26ct Multicolor Jasper, Oval, Opaque

43.1 x 24.1 mm

$ 48.50

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1.34ct Orange Hessonite Garnet, Cushion, VS-SI

6 x 6 mm (calibrated)

$ 22.02

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31.63ctw Multicolor Jasper, Cushion, Opaque

22.6 x 15.6 mm

$ 18.58

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10.14ct Green Opal, Oval, Opaque

18 x 13 mm (calibrated)

$ 21.71

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0.75ct Yellow Color-Change Diaspore, Cushion, VS

5.6 x 5.5 mm

$ 39.59

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2.52ct Orange Hessonite Garnet, Oval, VVS-VS

9.1 x 7.4 mm

$ 50.20

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58.04ct Violet Charoite, Baguette, Opaque

44.6 x 19 mm

$ 95.38

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0.85ct Yellow Morganite, Pear Shape, VS

8 x 6 mm (calibrated)

$ 37.25

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11.94ct Bi-Color Ametrine, Oval, VVS

17 x 12.6 mm

$ 78.48

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0.66ct Orange Citrine, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 6.57

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7.08ct Black Star Diopside, Round, Opaque

11 mm (calibrated)

$ 35.26

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5.41ct Multicolor Agate, Round, Opaque

9.5 mm (calibrated)

$ 5.12

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0.92ct Pink Strawberry Quartz, Oval, Transparent

7.4 x 5.9 mm

$ 11.64

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1.10ct Orange Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 66.28

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12.23ct Multicolor Agate, Oval, Translucent

14 x 14 mm (calibrated)

$ 24.36

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5.99ct Pink Morganite, Trillion, Transparent

12 x 12 mm (calibrated)

$ 65.63

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2.25ct Green Peridot, Cushion, VS

8.2 x 6.9 mm

$ 88.25

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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

Easy and good price

Posted By Bry_guy in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
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Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
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

Overall Rating -> 10 star ratings

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
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Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
Source: Bizrate
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