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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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0.85ct Green Peridot, Oval, VS

0.85ct Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 11.85

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3.03ctw Yellow Sillimanite, Oval, VVS-VS

3.03ctw Yellow Sillimanite, Oval, VVS-VS

7 x 5 mm (calibrated)

$ 116.19

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6.20ct Violet Amethyst, Pear Shape, Transparent

6.20ct Violet Amethyst, Pear Shape, Transparent

14.5 x 11.3 mm

$ 37.05

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3.47ctw Orange Hessonite Garnet, Oval, VS-SI

3.47ctw Orange Hessonite Garnet, Oval, VS-SI

9 x 7 mm (calibrated)

$ 69.12

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1.19ct Yellow Sphene, Oval, Transparent

1.19ct Yellow Sphene, Oval, Transparent

6.9 x 5.5 mm

$ 5.93

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2.06ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.06ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 34.40

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0.49ct Orange Spessartite Garnet, Oval, VS

0.49ct Orange Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 14.64

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1.52ct Green Sphene, Oval, Transparent

1.52ct Green Sphene, Oval, Transparent

7.1 x 6 mm

$ 7.57

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11.16ct Violet Amethyst, Oval, Transparent

11.16ct Violet Amethyst, Oval, Transparent

16.3 x 13.2 mm

$ 66.69

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30.12ct Green Malachite, Oval, Opaque

30.12ct Green Malachite, Oval, Opaque

25 x 18 mm (calibrated)

$ 33.00

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0.90ct Yellow Color-Change Diaspore, Cushion, VS

0.90ct Yellow Color-Change Diaspore, Cushion, VS

5.6 x 5.5 mm

$ 33.32

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1.54ctw Yellow Citrine, Heart, VVS-VS

1.54ctw Yellow Citrine, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 11.81

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11.56ct Brown Tiger'S Eye, Baguette, Opaque

11.56ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 14.97

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22.21ct Violet Amethyst, Round, VVS-VS

22.21ct Violet Amethyst, Round, VVS-VS

20 mm (calibrated)

$ 154.84

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 10.27

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18.51ct Violet Amethyst, Pear Shape, VVS-VS

18.51ct Violet Amethyst, Pear Shape, VVS-VS

21.5 x 16.1 mm

$ 129.05

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7.65ct Multicolor Labradorite, Round, Translucent

7.65ct Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 16.45

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0.62ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.62ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

6.4 x 4.2 mm

$ 19.73

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1.72ct Orange Zircon, Round, VVS-VS

1.72ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 37.69

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1.59ct White Rainbow Moonstone, Round, VVS-VS

1.59ct White Rainbow Moonstone, Round, VVS-VS

7 mm (calibrated)

$ 165.99

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30.44ctw Multicolor Fossil Coral, Fancy, Opaque

30.44ctw Multicolor Fossil Coral, Fancy, Opaque

22.8 x 12.4 mm

$ 27.79

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0.89ct Green Sphene, Oval, Transparent

0.89ct Green Sphene, Oval, Transparent

5.9 x 4.9 mm

$ 4.43

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4.73ct Yellow Citrine, Oval, VS

4.73ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 25.91

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2.41ctw Red Spessartite Garnet, Round, VS

2.41ctw Red Spessartite Garnet, Round, VS

4 mm (calibrated)

$ 113.33

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 is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good.

Posted By Tommy in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I've made several purchases over the last 8 years and I've never been less than happy with any of them.

Posted By Jess in July, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

Posted By Amman in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very good. I have made several purchases as a collector over the years, and have never been dissapointed in the selection, process, or delivery.

Posted By Schmoove in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate
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