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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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8.81ct Multicolor Fire Agate, Fancy, Opaque

8.81ct Multicolor Fire Agate, Fancy, Opaque

21 x 8.9 mm

$ 74.61

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0.96ct Brown Color-Change Garnet, Oval, VS

0.96ct Brown Color-Change Garnet, Oval, VS

6.2 x 4.6 mm

$ 76.69

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6.29ctw Violet Amethyst, Oval, Transparent

6.29ctw Violet Amethyst, Oval, Transparent

11 x 9 mm (calibrated)

$ 22.62

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6.16ct Yellow Citrine, Round, VVS

6.16ct Yellow Citrine, Round, VVS

12 mm (calibrated)

$ 47.24

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3.08ctw Red Rhodolite Garnet, Square, VS

3.08ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 26.96

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2.37ct Green Prehnite, Round, Transparent

2.37ct Green Prehnite, Round, Transparent

8 mm (calibrated)

$ 12.89

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2.70ct Yellow Cat'S Eye Apatite, Oval, Translucent

2.70ct Yellow Cat'S Eye Apatite, Oval, Translucent

7.9 x 7.1 mm

$ 20.71

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1.48ct Yellow Beryl, Oval, VS

1.48ct Yellow Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 29.48

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2.00ctw Orange Sunstone, Oval, Translucent

2.00ctw Orange Sunstone, Oval, Translucent

8 x 6 mm (calibrated)

$ 12.23

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16.43ctw Multicolor Fossil Coral, Trillion, Opaque

16.43ctw Multicolor Fossil Coral, Trillion, Opaque

21.4 x 13 mm

$ 17.99

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25.68ct White Howlite, Oval, Opaque

25.68ct White Howlite, Oval, Opaque

27.7 x 21.7 mm

$ 12.79

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1.70ct Orange Zircon, Round, VVS-VS

1.70ct Orange Zircon, Round, VVS-VS

6.5 mm (calibrated)

$ 37.25

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0.98ct Red Spessartite Garnet, Briolette, VS

0.98ct Red Spessartite Garnet, Briolette, VS

5.9 x 4.2 mm

$ 33.52

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13.14ctw White Dendritic Agate, Pear Shape, Opaque

13.14ctw White Dendritic Agate, Pear Shape, Opaque

16 x 12 mm (calibrated)

$ 10.47

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3.10ct Yellow Rutile Topaz, Baguette, Transparent

3.10ct Yellow Rutile Topaz, Baguette, Transparent

11.6 x 6.5 mm

$ 64.33

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11.47ct Multicolor Fire Agate, Oval, Translucent

11.47ct Multicolor Fire Agate, Oval, Translucent

15.2 x 14.2 mm

$ 89.98

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2.18ct Green Peridot, Cushion, VS

2.18ct Green Peridot, Cushion, VS

8.3 x 6.8 mm

$ 94.08

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24.92ct Green Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (690557)

24.92ct Green Tourmaline, Flower Cut, Transparent

22.4 x 18.4 mm

$ 485.73

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1.68ct Brown Tiger'S Eye, Oval, Opaque

1.68ct Brown Tiger'S Eye, Oval, Opaque

9 x 7 mm (calibrated)

$ 1.39

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1.30ct Brown Sillimanite Cat'S Eye, Oval, Transparent

1.30ct Brown Sillimanite Cat'S Eye, Oval, Transparent

7 x 5 mm (calibrated)

$ 3.88

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2.46ct Pink Kunzite, Emerald Cut, VS

2.46ct Pink Kunzite, Emerald Cut, VS

6.9 x 6.7 mm

$ 61.25

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32.88ct Multicolor Jasper, Oval, Opaque

32.88ct Multicolor Jasper, Oval, Opaque

26.5 x 22.7 mm

$ 20.17

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4.61ct Turquoise Fluorite, Pear Shape, Transparent

4.61ct Turquoise Fluorite, Pear Shape, Transparent

11.6 x 8.6 mm

$ 19.65

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3.18ct Yellow Citrine, Oval, VVS-VS

3.18ct Yellow Citrine, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 19.43

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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 had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.

Posted By Mattick in May, 2026
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Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.

Posted By Debsarabs in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
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Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate
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