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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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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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1.51ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 27.57

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15.24ct Green Tsavorite Garnet, Trillion, Translucent

15.7 x 15.3 mm

$ 333.94

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0.46ct Orange Spessartite Garnet, Oval, VS-SI

5 x 4 mm (calibrated)

$ 13.74

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0.93ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 18.53

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1.29ct Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 9.00

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1.03ct Yellow Color-Change Diaspore, Pear Shape, VS

7.2 x 5.6 mm

$ 55.39

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2.16ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 35.64

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30.12ctw Multicolor Labradorite, Oval, Translucent

25 x 18 mm (calibrated)

$ 65.99

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7.60ct Multicolor Cinnabar, Cushion, Opaque

13.7 x 13.3 mm

$ 8.90

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19.65ct Green Serpentine, Oval, Translucent

22.2 x 15.4 mm

$ 42.08

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27.09ctw Multicolor Fossil Coral, Pear Shape, Opaque

24 x 14 mm

$ 53.43

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0.82ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.44

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3.82ct Pink Rose Quartz, Emerald Cut, Transparent

9 x 9 mm (calibrated)

$ 20.92

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6.21ct Yellow Citrine, Emerald Cut, VVS

14 x 10 mm (calibrated)

$ 47.63

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2.09ctw Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 52.04

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3.96ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 19.72

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3.32ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 25.46

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0.41ct Yellow Sphalerite, Oval, SI-I1

4.8 x 4 mm

$ 20.42

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107.72ct Pink Rose Quartz, Square, Opaque

27.4 x 26.9 mm

$ 223.52

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0.07ctw White Diamond, Round, VS-SI

2.1 mm (calibrated)

$ 127.18

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1.99ct Violet Amethyst, Heart, VVS

8 x 8 mm (calibrated)

$ 13.88

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2.74ct Green Fluorite, Marquise, Transparent

13 x 6.4 mm

$ 11.27

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2.31ct Yellow Citrine, Square, VVS-VS

8 x 8 mm (calibrated)

$ 13.51

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2.32ct Multicolor Opal, Oval, Transparent

11.8 x 8.8 mm

$ 103.98

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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

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly

Posted By Ron T in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

So far So good

Posted By VH-1 in July, 2025
Source: Bizrate
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