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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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26.28ct Brown Tiger'S Eye, Oval, Opaque

26.28ct Brown Tiger'S Eye, Oval, Opaque

22.3 x 16.2 mm

$ 26.18

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2.12ct Orange Hessonite Garnet, Round, VS-SI

2.12ct Orange Hessonite Garnet, Round, VS-SI

7 mm (calibrated)

$ 34.35

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0.86ct Pink Spinel, Cushion, VS

0.86ct Pink Spinel, Cushion, VS

5.4 x 5.3 mm

$ 128.48

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1.07ct Orange Zircon, Oval, VVS

1.07ct Orange Zircon, Oval, VVS

6 x 4.9 mm

$ 15.99

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0.74ct Orange Zircon, Oval, VS

0.74ct Orange Zircon, Oval, VS

6 x 4 mm (calibrated)

$ 11.06

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10.20ct Multicolor Agate, Oval, Opaque

10.20ct Multicolor Agate, Oval, Opaque

13 x 13 mm (calibrated)

$ 17.27

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6.13ctw Multicolor Tourmaline, Briolette, VS-SI
Tourmaline Product Video (352899)

6.13ctw Multicolor Tourmaline, Briolette, VS-SI

6.5 x 3.8 mm

$ 107.46

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2.34ct Yellow Cat'S Eye Apatite, Oval, Transparent

2.34ct Yellow Cat'S Eye Apatite, Oval, Transparent

7.9 x 7.2 mm

$ 17.94

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5.73ct Yellow Citrine, Oval, VVS

5.73ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 34.40

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4.34ct Green Jade, Oval, Opaque

4.34ct Green Jade, Oval, Opaque

12 x 10 mm (calibrated)

$ 8.65

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1.40ct Yellow Rutile Topaz, Pear Shape, Transparent

1.40ct Yellow Rutile Topaz, Pear Shape, Transparent

9 x 6 mm (calibrated)

$ 29.05

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1.30ct Yellow Beryl, Trillion, VVS

1.30ct Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 25.90

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12.31ctw Brown Hessonite Garnet, Oval, Translucent

12.31ctw Brown Hessonite Garnet, Oval, Translucent

13 x 10 mm

$ 67.44

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11.04ct Orange Star Moonstone, Oval, Translucent

11.04ct Orange Star Moonstone, Oval, Translucent

17.6 x 10.3 mm

$ 48.39

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0.66ct Green Tourmaline, Emerald Cut, VS-SI

0.66ct Green Tourmaline, Emerald Cut, VS-SI

6 x 3.7 mm

$ 32.87

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27.88ctw Black Spinel, Baguette, Opaque

27.88ctw Black Spinel, Baguette, Opaque

20.1 x 9.9 mm

$ 91.63

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1.71ct Green Tourmaline, Emerald Cut, VVS

1.71ct Green Tourmaline, Emerald Cut, VVS

14.8 x 3.8 mm

$ 46.85

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32.16ct Multicolor Jasper, Oval, Opaque

32.16ct Multicolor Jasper, Oval, Opaque

32.4 x 22.8 mm

$ 19.38

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19.29ct Orange Druzy Citrine, Pear Shape, Opaque

19.29ct Orange Druzy Citrine, Pear Shape, Opaque

25.4 x 14.3 mm

$ 34.86

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3.15ctw Yellow Golden Beryl, Round, VVS-VS

3.15ctw Yellow Golden Beryl, Round, VVS-VS

8 mm (calibrated)

$ 87.00

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15.44ct Violet Amethyst, Fancy, Transparent
Amethyst Product Video (446269)

15.44ct Violet Amethyst, Fancy, Transparent

22.1 x 14.5 mm

$ 46.13

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1.44ct Green Tourmaline, Oval, VS

1.44ct Green Tourmaline, Oval, VS

7.8 x 6.9 mm

$ 200.79

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8.32ct Brown Smoky Quartz, Round, VVS-VS

8.32ct Brown Smoky Quartz, Round, VVS-VS

14 mm (calibrated)

$ 13.68

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3.81ctw Red Pyrope Garnet, Marquise, VVS

3.81ctw Red Pyrope Garnet, Marquise, VVS

12 x 6.1 mm

$ 33.40

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

I always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.

Posted By Maharishi in June, 2026
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 -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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