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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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Yellow Untreated Gemstones
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62.74ct Blue Turquoise, Oval, Opaque

31.4 x 26 mm

$ 187.46

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3.70ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 27.75

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1.28ct Orange Hessonite Garnet, Oval, VS

7.4 x 6 mm

$ 19.56

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2.00ct Green Prehnite, Oval, Transparent

7.7 x 6.8 mm

$ 12.91

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1.49ct Orange Hessonite Garnet, Oval, VS

7.6 x 6.2 mm

$ 28.20

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0.34ct Yellow Color-Change Diaspore, Oval, VVS-VS

4.5 x 3.9 mm

$ 17.94

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1.36ct Green Sphene, Oval, Transparent

6.6 x 5.8 mm

$ 7.45

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1.65ct Multicolor Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 41.09

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0.84ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.86

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2.37ctw Green Tsavorite Garnet, Round, VS-SI

2.4 mm (calibrated)

$ 184.07

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13.62ctw Violet Amethyst, Oval, Transparent

14 x 10 mm (calibrated)

$ 74.61

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2.24ct Orange Hessonite Garnet, Oval, SI

8.4 x 7.2 mm

$ 34.99

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0.59ct Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 2.94

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17.46ct Multicolor Agate, Oval, Opaque

18.8 x 15.8 mm

$ 17.39

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2.67ct Yellow Rutile Quartz, Pear Shape, Transparent

10.4 x 7.3 mm

$ 7.20

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5.03ct Multicolor Ruby In Fuchsite, Marquise, Translucent

18.2 x 10.5 mm

$ 37.14

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0.85ct Pink Malaya Garnet, Round, VS

5.5 mm (calibrated)

$ 27.94

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24.70ct Black Nuummite, Oval, Opaque

23.6 x 16.2 mm

$ 103.38

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77.09ct Multicolor Chrysocolla, Oval, Opaque

42 x 33.4 mm

$ 131.29

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15.26ct Multicolor Jasper, Oval, Opaque

20 x 15 mm (calibrated)

$ 25.08

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1.60ct Pink Tourmaline, Oval, VVS

7.4 x 6.2 mm

$ 239.04

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0.54ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 17.93

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1.26ct Multicolor Opal, Trillion, Transparent

8 x 8 mm (calibrated)

$ 32.21

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2.00ct White Rainbow Moonstone, Oval, VS

8.2 x 6.9 mm

$ 208.79

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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

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to conduct search, good amount of stock to select from along with variety of prices.

Posted By Que in June, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate
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