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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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Untreated Gemstones Treatment

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Bi-color Untreated Gemstones
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Multicolor Untreated Gemstones
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Yellow Untreated Gemstones
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7.67ct Pink Strawberry Quartz, Oval, Translucent

14.9 x 11.1 mm

$ 48.24

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27.23ct Multicolor Amethyst Geode Slice, Fancy, Transparent

27 x 20 mm (calibrated)

$ 29.03

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36.94ct White Jadeite, Oval, Translucent

27.9 x 22.3 mm

$ 60.71

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2.11ct Red Coral, Oval, Opaque

11.9 x 5 mm

$ 288.96

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30.94ct Multicolor Boulder Opal, Fancy, Opaque

25.4 x 20.1 mm

$ 169.49

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38.51ct Green Fluorite, Round, Transparent

20 mm (calibrated)

$ 70.32

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16.81ct Multicolor Quartz With Marcasite, Fancy, Transparent

23.4 x 14 mm

$ 110.51

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28.63ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 125.46

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33.78ct Multicolor Pietersite, Oval, Opaque

30 x 22 mm (calibrated)

$ 111.02

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8.21ct Turquoise Hemimorphite Druzy, Fancy, Opaque

13.6 x 10.2 mm

$ 134.92

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12.04ct Pink Kunzite, Pear Shape, VS

19.3 x 9.5 mm

$ 227.84

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13.90ctw Brown Smoky Quartz, Oval, VVS

14 x 12 mm (calibrated)

$ 53.03

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1.50ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 53.88

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2.66ct Yellow Golden Beryl, Round, VVS

9 mm (calibrated)

$ 64.11

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1.10ct Green Tsavorite Garnet, Heart, VS-SI

6.7 x 5.8 mm

$ 602.58

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0.71ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 9.07

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112.60ct Pink Rose Quartz, Oval, Transparent

35.6 x 25.4 mm

$ 246.73

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0.87ct Multicolor Opal, Round, Transparent

7 mm (calibrated)

$ 18.02

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2.02ct Red Ruby, Cushion, SI

7 x 7 mm (calibrated)

$ 7,507.62

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19.68ct Black Obsidian, Oval, Opaque

31 x 16.8 mm

$ 12.25

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1.67ct Green Tourmaline, Fancy, VVS

7.8 x 5.7 mm

$ 199.60

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1.29ct Yellow Chrysoberyl, Pear Shape, VS

8 x 6 mm (calibrated)

$ 150.34

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14.93ct Yellow Apatite, Oval, VS

16.2 x 13.4 mm

$ 616.67

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6.68ct Brown Moonstone, Flower Cut, Translucent

14 x 14 mm (calibrated)

$ 29.27

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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

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 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 -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate
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