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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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1.38ct Yellow Beryl, Round, VS

1.38ct Yellow Beryl, Round, VS

7 mm (calibrated)

$ 30.24

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69.39ct Multicolor Jasper, Oval, Opaque

69.39ct Multicolor Jasper, Oval, Opaque

45.5 x 29.1 mm

$ 40.09

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0.95ct Yellow Citrine, Round, VVS

0.95ct Yellow Citrine, Round, VVS

7 mm (calibrated)

$ 7.57

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7.51ct Multicolor Agate, Oval, Opaque

7.51ct Multicolor Agate, Oval, Opaque

13 x 11 mm (calibrated)

$ 7.48

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12.26ct White Rainbow Moonstone, Marquise, Transparent

12.26ct White Rainbow Moonstone, Marquise, Transparent

24.6 x 10.9 mm

$ 97.69

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1.71ct Orange Hessonite Garnet, Oval, VS

1.71ct Orange Hessonite Garnet, Oval, VS

7.8 x 6.5 mm

$ 26.13

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3.75ctw Red Pyrope Garnet, Marquise, VS

3.75ctw Red Pyrope Garnet, Marquise, VS

12 x 6 mm

$ 32.87

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0.93ct White Opal, Marquise, Transparent

0.93ct White Opal, Marquise, Transparent

11.9 x 5.7 mm

$ 23.16

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0.93ct Orange Zircon, Oval, VS

0.93ct Orange Zircon, Oval, VS

5.9 x 4.9 mm

$ 23.16

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1.02ct Violet Amethyst, Marquise, VVS

1.02ct Violet Amethyst, Marquise, VVS

10 x 5 mm (calibrated)

$ 6.77

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19.33ct Green Cat'S Eye Aquamarine, Oval, Transparent
Cat's Eye Aquamarine Product Video (382724)

19.33ct Green Cat'S Eye Aquamarine, Oval, Transparent

18.1 x 12.2 mm

$ 339.69

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1.06ct Yellow Color-Change Diaspore, Pear Shape, VS

1.06ct Yellow Color-Change Diaspore, Pear Shape, VS

8.9 x 4.5 mm

$ 56.49

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3.91ctw Violet Amethyst, Oval, VVS-VS
Amethyst Product Video (357810)

3.91ctw Violet Amethyst, Oval, VVS-VS

6 x 4 mm (calibrated)

$ 21.42

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5.65ctw Brown Tiger'S Eye, Oval, Opaque

5.65ctw Brown Tiger'S Eye, Oval, Opaque

10 x 8 mm (calibrated)

$ 5.63

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21.80ct Multicolor Jasper, Fancy, Opaque

21.80ct Multicolor Jasper, Fancy, Opaque

29 x 9.4 mm

$ 13.14

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2.21ct Orange Hessonite Garnet, Emerald Cut, SI

2.21ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 41.45

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31.99ct Gray Hematite, Pear Shape, Opaque

31.99ct Gray Hematite, Pear Shape, Opaque

25.1 x 16.5 mm

$ 31.19

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6.63ct Brown Smoky Quartz, Round, VVS-VS

6.63ct Brown Smoky Quartz, Round, VVS-VS

13 mm (calibrated)

$ 10.91

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15.03ct Violet Amethyst, Emerald Cut, VVS-VS

15.03ct Violet Amethyst, Emerald Cut, VVS-VS

18 x 13 mm (calibrated)

$ 104.79

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6.21ct Yellow Citrine, Briolette, VVS

6.21ct Yellow Citrine, Briolette, VVS

14.6 x 8.6 mm

$ 34.76

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14.11ct Brown Tiger'S Eye, Pear Shape, Opaque

14.11ct Brown Tiger'S Eye, Pear Shape, Opaque

20 x 15 mm (calibrated)

$ 14.05

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1.36ct Green Tourmaline, Emerald Cut, VS

1.36ct Green Tourmaline, Emerald Cut, VS

16.4 x 3.6 mm

$ 35.76

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0.58ct Yellow Citrine, Trillion, VVS-VS

0.58ct Yellow Citrine, Trillion, VVS-VS

6 x 6 mm (calibrated)

$ 4.81

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26.37ct Green Aventurine, Fancy, Opaque

26.37ct Green Aventurine, Fancy, Opaque

38.2 x 10 mm

$ 2.16

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

Great! Affordable

Posted By Spinellope in April, 2026
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Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman 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

I enjoyed the enormous amount of knowledge on your site. It helped me choose the gems I purchased.

Posted By Merrigold in August, 2026
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Overall Rating -> 10 star ratings

I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.

Posted By Atsuhisa in January, 2026
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Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 2026
Source: Bizrate
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