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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
Untreated Gemstones Price
Untreated Gemstones Treatment

Size Explained

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For Example: 8-9
Bi-color Untreated Gemstones
Black Untreated Gemstones
Blue Untreated Gemstones
Brown Untreated Gemstones
Golden Untreated Gemstones
Gray Untreated Gemstones
Green Untreated Gemstones
Multicolor Untreated Gemstones
Orange Untreated Gemstones
Pink Untreated Gemstones
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Red Untreated Gemstones
Turquoise Untreated Gemstones
Violet Untreated Gemstones
White Untreated Gemstones
Yellow Untreated Gemstones
Single
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29.82ctw Multicolor Fossil Coral, Oval, Opaque

29.82ctw Multicolor Fossil Coral, Oval, Opaque

20.3 x 13 mm

$ 38.55

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9.38ct Turquoise Larimar, Pear Shape, Opaque

9.38ct Turquoise Larimar, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 93.34

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0.23ct Yellow Diamond, Round, VS
Diamond Product Video (564615)

0.23ct Yellow Diamond, Round, VS

4 mm (calibrated)

$ 419.90

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11.09ct Multicolor Coral, Round, Translucent

11.09ct Multicolor Coral, Round, Translucent

17 mm (calibrated)

$ 24.30

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27.61ct Brown Moonstone, Oval, Opaque

27.61ct Brown Moonstone, Oval, Opaque

22.3 x 16.1 mm

$ 60.50

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6.84ct Green Actinolite Cat'S Eye, Oval, Translucent
Actinolite Cat's Eye Product Video (486225)

6.84ct Green Actinolite Cat'S Eye, Oval, Translucent

14 x 10 mm (calibrated)

$ 47.69

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4.14ct Pink Strawberry Quartz, Round, Translucent

4.14ct Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 24.86

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13.98ct Turquoise Grandidierite, Oval, SI
Grandidierite Product Video (470658)

13.98ct Turquoise Grandidierite, Oval, SI

16.5 x 13.7 mm

$ 7,658.24

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62.26ct Multicolor Jasper, Pear Shape, Opaque
Jasper Product Video (348778)

62.26ct Multicolor Jasper, Pear Shape, Opaque

36.8 x 30.2 mm

$ 68.22

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19.31ct Multicolor Rainbow Pyrite, Fancy, Opaque

19.31ct Multicolor Rainbow Pyrite, Fancy, Opaque

17.9 x 13.7 mm

$ 50.01

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46.72ctw White Howlite, Sphere / Ball, Opaque

46.72ctw White Howlite, Sphere / Ball, Opaque

15 mm (calibrated)

$ 24.19

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3.63ct Pink Tourmaline, Emerald Cut, SI
Tourmaline Product Video (545337)

3.63ct Pink Tourmaline, Emerald Cut, SI

11.6 x 6.4 mm

$ 228.68

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1.84ct Multicolor Opal, Marquise, Transparent

1.84ct Multicolor Opal, Marquise, Transparent

13.8 x 6.7 mm

$ 64.14

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2.65ct Green Peridot, Cushion, VS-SI
Peridot Product Video (334346)

2.65ct Green Peridot, Cushion, VS-SI

10 x 8 mm (calibrated)

$ 87.10

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1.04ct Yellow Sphalerite, Oval, SI-I1

1.04ct Yellow Sphalerite, Oval, SI-I1

7 x 5 mm (calibrated)

$ 51.79

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9.34ct Orange Star Moonstone, Oval, Translucent

9.34ct Orange Star Moonstone, Oval, Translucent

18.8 x 10.6 mm

$ 37.21

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40.83ct Multicolor Agate Geode, Fancy, Opaque
Agate Geode Product Video (391994)

40.83ct Multicolor Agate Geode, Fancy, Opaque

27.6 x 27.5 mm

$ 44.73

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95.38ct Violet Amethyst, Cushion, VS
Amethyst Product Video (638587)

95.38ct Violet Amethyst, Cushion, VS

28.7 x 25.7 mm

$ 554.16

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2.71ct Red Fire Opal, Oval, Transparent
Fire Opal Product Video (675394)

2.71ct Red Fire Opal, Oval, Transparent

11.9 x 9.2 mm

$ 72.72

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24.94ct Multicolor Rhodochrosite, Pear Shape, Opaque

24.94ct Multicolor Rhodochrosite, Pear Shape, Opaque

34.5 x 13.3 mm

$ 68.32

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12.50ct Brown Smoky Quartz, Emerald Cut, VVS-VS
Smoky Quartz Product Video (533010)

12.50ct Brown Smoky Quartz, Emerald Cut, VVS-VS

14 x 14 mm (calibrated)

$ 20.55

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1.11ct Yellow Sphene, Pear Shape, VS-SI

1.11ct Yellow Sphene, Pear Shape, VS-SI

8 x 5.5 mm

$ 36.49

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9.61ct Brown Smoky Quartz, Fancy, VVS

9.61ct Brown Smoky Quartz, Fancy, VVS

16.2 x 14 mm

$ 38.74

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1.90ct Multicolor Chocolate Opal, Oval, Translucent

1.90ct Multicolor Chocolate Opal, Oval, Translucent

13 x 9 mm (calibrated)

$ 62.45

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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 has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.

Posted By RJ in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

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 -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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