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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
Untreated Gemstones Clarity
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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
Orange Untreated Gemstones
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Yellow Untreated Gemstones
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0.36ct Yellow Diamond, Round, VS

4.5 mm (calibrated)

$ 547.68

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57.85ct Blue Larimar, Fancy, Opaque

31.4 x 30.1 mm

$ 570.47

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1.37ct Yellow Color-Change Diaspore, Cushion, VS

8.1 x 5.2 mm

$ 67.55

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2.36ctw Pink Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 129.28

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40.56ct Blue Aquamarine, Emerald Cut, VVS

22 x 17.5 mm

$ 10,785.85

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2.78ct Orange Coral, Oval, Opaque

12 x 5.6 mm

$ 456.87

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5.38ctw Orange Hessonite Garnet, Cushion, VS-SI

9 x 7 mm (calibrated)

$ 89.31

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1.34ct Bi-Color Tourmaline, Emerald Cut, VVS

8.7 x 4.8 mm

$ 360.35

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12.80ct Pink Rose Quartz, Emerald Cut, Transparent

14 x 14 mm (calibrated)

$ 58.43

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55.63ct Green Serpentine, Oval, Translucent

33.6 x 23 mm

$ 99.27

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9.92ct Green Prehnite, Fancy, Transparent

17.7 x 14.5 mm

$ 13.80

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1.50ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 53.88

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19.58ct Pink Coral, Flower Cut, Opaque

18.2 x 16.9 mm

$ 286.03

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110.64ct Orange Druzy Citrine, Oval, Opaque

39.1 x 31.4 mm

$ 53.95

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2.76ct Yellow Golden Beryl, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 75.60

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2.60ct Green Tourmaline, Emerald Cut, VVS

21.1 x 4 mm

$ 71.21

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46.91ct Multicolor Rhodochrosite, Oval, Opaque

35.1 x 19.2 mm

$ 112.60

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14.93ctw Brown Tiger'S Eye, Baguette, Opaque

14 x 10 mm (calibrated)

$ 16.35

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1.27ct Yellow Color-Change Diaspore, Emerald Cut, SI

12.1 x 3.9 mm

$ 68.28

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32.34ctw Multicolor Labradorite, Oval, Translucent

25 x 18 mm (calibrated)

$ 70.87

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43.66ct White Dendritic Agate, Pear Shape, Opaque

43.3 x 22.2 mm

$ 21.75

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12.95ct Brown Smoky Quartz, Round, Transparent

16 mm (calibrated)

$ 42.57

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3.20ctw Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 55.51

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3.90ct Pink Tourmaline, Emerald Cut, VS-SI

11.6 x 5.8 mm

$ 160.23

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

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was all good

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the product and the details about each of them.

Posted By Love It! in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Was a good experience.

Posted By Tim in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Excellent options

Posted By CJ in February, 2026
Source: Bizrate
Enlarged Gemstone Image