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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
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0.67ct Yellow Citrine, Pear Shape, VVS-VS

7 x 5 mm (calibrated)

$ 3.34

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2.64ctw Orange Hessonite Garnet, Cushion, VS

6 x 6 mm (calibrated)

$ 44.02

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3.33ctw Green Kornerupine, Oval, VVS-VS

5.3 x 3.8 mm

$ 109.45

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1.26ctw Red Pyrope Garnet, Heart, VS

5 x 5 mm (calibrated)

$ 33.13

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1.81ct Orange Hessonite Garnet, Oval, VS-SI

8 x 6.6 mm

$ 32.20

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27.04ct Brown Tiger'S Eye, Fancy, Opaque

33.3 x 10.7 mm

$ 2.69

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2.95ct Green Prehnite, Pear Shape, Transparent/Translucent

10 x 7 mm (calibrated)

$ 16.17

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3.49ct Pink Strawberry Quartz, Oval, Transparent

11 x 9 mm (calibrated)

$ 26.18

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0.23ct Orange Spessartite Garnet, Oval, VS

3.9 x 3 mm

$ 8.02

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0.30ct Violet Iolite, Baguette, VS

5 x 3 mm (calibrated)

$ 11.95

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129.84ct Pink Star Rose Quartz, Oval, Translucent

30.1 x 26.5 mm

$ 215.53

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2.43ct Yellow Apatite, Emerald Cut, VVS-VS

8 x 8 mm (calibrated)

$ 127.53

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0.57ct Green Sphene, Oval, VVS-VS

5.5 x 4.2 mm

$ 24.98

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1.65ct Green Tourmaline, Oval, VVS-VS

7.5 x 6.7 mm

$ 230.08

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32.33ctw Gray Hematite, Emerald Cut, Opaque

18.3 x 13.8 mm

$ 31.52

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3.47ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 26.61

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1.22ct Purple Spinel, Cushion, VS

7 x 6 mm

$ 182.27

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0.58ct Pink Spinel, Cushion, VVS-VS

5 x 4.5 mm

$ 40.44

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3.05ct Violet Amethyst, Heart, VVS-VS

10 x 10 mm (calibrated)

$ 23.40

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1.56ct Multicolor Opal, Pear Shape, Translucent

12 x 8 mm (calibrated)

$ 45.78

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4.54ct Yellow Apatite, Oval, VS

12.4 x 8.8 mm

$ 146.26

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0.84ct Green Tourmaline, Emerald Cut, VS

7.7 x 3.4 mm

$ 41.83

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3.20ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 25.50

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0.02ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 15.94

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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

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very good place to buy gemstones

Posted By Elansary in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

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

Very large selection from affordable to high end I will be coming back to shop again!

Posted By GreenGator in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate
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