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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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57.73ctw Gray Hematite, Baguette, Opaque

18.2 x 14.5 mm

$ 56.29

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19.79ct Yellow Obsidian, Pear Shape, Opaque

30 x 22 mm (calibrated)

$ 17.34

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6.29ct Yellow Citrine, Briolette, VVS

13 x 9 mm (calibrated)

$ 35.49

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6.28ct Yellow Citrine, Briolette, VVS

14.3 x 8.6 mm

$ 35.42

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6.60ct Brown Smoky Quartz, Round, VVS-VS

13 mm (calibrated)

$ 21.70

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7.39ct Yellow Rutile Quartz, Pear Shape, Transparent

15.8 x 10.4 mm

$ 31.22

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1.62ct Yellow Sphene, Oval, Transparent

6.8 x 6.3 mm

$ 8.07

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31.01ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

29.7 x 15.9 mm

$ 30.88

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21.72ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 47.59

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1.89ctw Pink Morganite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 103.53

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0.26ct Violet Iolite, Emerald Cut, VS

5 x 3 mm (calibrated)

$ 10.36

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3.57ct Pink Rose Quartz, Emerald Cut, Transparent

10 x 10 mm (calibrated)

$ 19.56

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2.24ctw Yellow Citrine, Pear Shape, VVS-VS

9 x 6 mm (calibrated)

$ 14.72

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2.60ctw Violet Amethyst, Oval, VVS-VS

6.1 x 4.2 mm

$ 14.24

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12.79ct White Agate, Round, Opaque

16 mm (calibrated)

$ 20.26

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2.18ct Yellow Golden Beryl, Oval, VS

10 x 8 mm (calibrated)

$ 59.71

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20.21ct Bi-Color Ametrine, Oval, VVS-VS

20 x 15 mm (calibrated)

$ 132.86

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7.40ct Multicolor Ruby-Zoisite, Marquise, Opaque

19.1 x 8.3 mm

$ 22.30

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6.81ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 25.44

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1.27ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

7.3 x 4.7 mm

$ 66.37

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1.11ctw Pink Morganite, Pear Shape, VVS-VS

7.5 x 3.4 mm

$ 121.61

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3.20ctw Red Pyrope Garnet, Marquise, VVS

12 x 5.9 mm

$ 28.05

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0.97ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 7.44

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44.00ct Multicolor Chrysocolla, Round, Opaque

30.1 mm

$ 72.31

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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

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I liked the selection of gems, and price. I did not like your PayPal process. I already have a PP account and you want me to sign up for another.

Posted By CLTCJH in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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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

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
Source: Bizrate
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