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Home › Gemstones › Natural Untreated Gemstones

Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
Blue Natural Untreated Gemstones
Brown Natural Untreated Gemstones
Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
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18.34ct Brown Moonstone, Oval, Opaque

18.34ct Brown Moonstone, Oval, Opaque

20 x 15 mm (calibrated)

$ 40.19

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23.93ct Black Feather Pyrite, Oval, Opaque

23.93ct Black Feather Pyrite, Oval, Opaque

25.4 x 19.1 mm

$ 18.67

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3.24ctw Green Prehnite, Round, Transparent

3.24ctw Green Prehnite, Round, Transparent

7.5 mm (calibrated)

$ 17.61

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1.47ct Multicolor Opal, Pear Shape, Transparent

1.47ct Multicolor Opal, Pear Shape, Transparent

12 x 8 mm (calibrated)

$ 51.78

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22.91ct Multicolor Agate, Oval, Opaque

22.91ct Multicolor Agate, Oval, Opaque

18.6 x 17.2 mm

$ 38.79

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9.70ct Multicolor Agate, Oval, Translucent

9.70ct Multicolor Agate, Oval, Translucent

14 x 12 mm (calibrated)

$ 19.32

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2.77ctw Orange Hessonite Garnet, Emerald Cut, VS

2.77ctw Orange Hessonite Garnet, Emerald Cut, VS

6.3 x 6.3 mm

$ 54.63

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5.04ct Brown Rutile Quartz, Round, Translucent

5.04ct Brown Rutile Quartz, Round, Translucent

12 mm (calibrated)

$ 12.64

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29.35ct Multicolor Labradorite, Round, Translucent

29.35ct Multicolor Labradorite, Round, Translucent

25 mm

$ 64.90

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3.35ct Yellow Citrine, Oval, VVS-VS

3.35ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 23.36

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1.06ct Green Tourmaline, Baguette, VVS

1.06ct Green Tourmaline, Baguette, VVS

8.8 x 4.4 mm

$ 36.95

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16.82ct Multicolor Agate, Oval, Opaque

16.82ct Multicolor Agate, Oval, Opaque

16 x 16 mm (calibrated)

$ 16.75

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8.48ct Multicolor Pietersite, Cushion, Opaque

8.48ct Multicolor Pietersite, Cushion, Opaque

16.1 x 10.5 mm

$ 20.77

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0.98ct Yellow Citrine, Round, VS

0.98ct Yellow Citrine, Round, VS

7 mm (calibrated)

$ 6.51

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2.16ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

2.16ctw Gray Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 6.81

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0.03ct White Diamond, Round, VVS

0.03ct White Diamond, Round, VVS

2 mm (calibrated)

$ 68.48

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4.46ctw Brown Tiger'S Eye, Oval, Opaque

4.46ctw Brown Tiger'S Eye, Oval, Opaque

9 x 7 mm (calibrated)

$ 3.70

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4.86ct Pink Morganite, Oval, Transparent

4.86ct Pink Morganite, Oval, Transparent

13.1 x 10 mm

$ 48.41

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7.15ct Yellow Citrine, Cushion, VVS
Citrine Product Video (445370)

7.15ct Yellow Citrine, Cushion, VVS

16.6 x 9.6 mm

$ 39.18

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2.17ct Orange Moonstone, Square, Translucent

2.17ct Orange Moonstone, Square, Translucent

7 x 7 mm (calibrated)

$ 4.34

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7.01ct Brown Smoky Quartz, Round, VVS-VS

7.01ct Brown Smoky Quartz, Round, VVS-VS

13 mm (calibrated)

$ 23.04

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5.84ct Violet Amethyst, Pear Shape, VS

5.84ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 44.79

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0.87ct Green Peridot, Oval, VS

0.87ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 12.13

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6.44ct Yellow Citrine, Oval, VVS-VS

6.44ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 39.01

View Gem
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Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

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

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

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Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
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Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
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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
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Overall Rating -> 10 star ratings

My current project is something BLUE . Opal earrings with matching tennis bracelet for her wedding. The opals and sixty two sapphires VVS & VS are AMAZINGLY BEAUTIFUL. The private jewelers were impressed by the clarity and inclusion free of the sapphires . I want to say thank you for the High quality sapphires that I purchased for my daughtera's wedding.

Posted By My real name Dean or Wandering about in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use. No issues. Large selection of gems.

Posted By CLTCJH in February, 2026
Source: Bizrate
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