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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
Untreated Gemstones Clarity
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Untreated Gemstones Treatment

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Yellow Untreated Gemstones
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2.66ct Orange Hessonite Garnet, Oval, VS

8.9 x 7.5 mm

$ 58.28

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12.56ct Multicolor Labradorite, Round, Translucent

15 mm (calibrated)

$ 27.02

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14.48ct Violet Charoite, Cushion, Opaque

22.9 x 10.3 mm

$ 23.95

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4.38ct Multicolor Opal, Oval, Translucent

15.2 x 11.2 mm

$ 109.06

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5.89ct Pink Strawberry Quartz, Oval, Transparent

12 x 10 mm (calibrated)

$ 29.33

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14.14ct Black Nuummite, Oval, Opaque

16 x 12.8 mm

$ 61.50

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1.70ct Pink Tourmaline, Oval, VS

8 x 6 mm (calibrated)

$ 253.98

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0.03ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 10.27

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5.23ct Pink Rose Quartz, Round, Transparent

12 mm (calibrated)

$ 20.80

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4.71ct Green Jade, Oval, Transparent

12 x 10 mm (calibrated)

$ 9.38

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16.55ct Multicolor Agate, Fancy, Opaque

20.5 x 9 mm

$ 28.98

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7.21ct Multicolor Agate, Fancy, Translucent

10.3 x 8.4 mm

$ 12.62

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2.99ctw Pink Tourmaline, Oval, Transparent

8.2 x 6.3 mm

$ 51.25

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3.36ctw Red Pyrope Garnet, Square, VS

4 x 3.8 mm

$ 25.76

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1.53ct Orange Hessonite Garnet, Square, VS

6 x 6 mm (calibrated)

$ 25.74

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1.32ct Orange Citrine, Cushion, Transparent

8 x 6 mm (calibrated)

$ 10.12

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4.39ct Brown Smoky Quartz, Round, VVS

12 mm (calibrated)

$ 14.43

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3.60ctw Yellow Citrine, Round, VS

8 mm (calibrated)

$ 28.68

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2.23ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 97.72

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0.78ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 5.44

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46.51ct Green Aragonite, Fancy, Opaque

35.2 x 18.7 mm

$ 54.43

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6.26ct Brown Smoky Quartz, Emerald Cut, VS

11 x 11 mm (calibrated)

$ 17.15

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1.17ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 17.85

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1.11ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 27.64

View Gem
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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

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
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

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

Posted By Que in June, 2025
Source: Bizrate
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