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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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1.16ct Brown Kornerupine, Oval, VVS

7.5 x 6 mm

$ 63.54

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48.56ct White Quartz, Emerald Cut, VS

23 x 23 mm

$ 83.04

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2.41ct Blue Chalcedony, Oval, Transparent

10 x 8 mm (calibrated)

$ 4.80

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0.69ct Green Tourmaline, Emerald Cut, VVS-VS

11.3 x 3 mm

$ 17.18

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4.93ct Yellow Citrine, Oval, VVS

13 x 9.6 mm

$ 32.41

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1.84ct Brown Tiger'S Eye, Marquise, Opaque

10 x 5 mm (calibrated)

$ 2.38

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16.44ct White Rainbow Moonstone, Pear Shape, Transparent

25.1 x 14.3 mm

$ 245.61

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25.96ct Multicolor Jasper, Oval, Opaque

28 x 18.7 mm

$ 21.90

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1.05ct Purple Rhodolite Garnet, Oval, VS-SI

7 x 5 mm (calibrated)

$ 27.89

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2.65ctw Multicolor Tourmaline, Flower Cut, Transparent

7.8 x 7 mm

$ 51.65

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6.52ct Green Actinolite Cat'S Eye, Oval, Translucent

14 x 12 mm (calibrated)

$ 45.46

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2.89ct Orange Hessonite Garnet, Oval, VS-SI

9.6 x 7.9 mm

$ 45.15

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2.53ct White Moonstone, Round, Translucent

8 mm (calibrated)

$ 6.86

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0.87ct Yellow Color-Change Diaspore, Emerald Cut, VVS

8 x 4.1 mm

$ 45.92

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0.34ct Pink Morganite, Oval, VS

5.5 x 4.2 mm

$ 15.24

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12.14ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 12.09

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5.05ctw Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 6.94

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2.57ct White Rainbow Moonstone, Oval, Transparent

11 x 9 mm (calibrated)

$ 84.50

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14.49ct Green Prehnite, Fancy, Translucent

18.8 x 18 mm

$ 23.81

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1.00ctw Green Peridot, Marquise, VVS-VS

8.1 x 4.1 mm

$ 8.76

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1.15ct Green Sphene, Oval, Transparent

6.6 x 6.4 mm

$ 5.73

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0.23ctw White Diamond, Round, VVS-VS

3 mm (calibrated)

$ 373.80

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2.31ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 45.56

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1.06ct Multicolor Tourmaline, Emerald Cut, VS

8.3 x 4.1 mm

$ 237.55

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

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 -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

hassle free experience.

Posted By Jhidron in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

good navigation and simple interface.

Posted By Dave in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!

Posted By SallyO in February, 2026
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
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