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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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4.74ct White Dendritic Agate, Pear Shape, Opaque

4.74ct White Dendritic Agate, Pear Shape, Opaque

14.5 x 10.5 mm

$ 3.78

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0.42ct Orange Sphalerite, Round, SI

0.42ct Orange Sphalerite, Round, SI

4.2 mm

$ 20.92

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5.53ct Pink Rose Quartz, Round, Transparent

5.53ct Pink Rose Quartz, Round, Transparent

12 mm (calibrated)

$ 18.33

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11.83ct Brown Tiger'S Eye, Baguette, Opaque

11.83ct Brown Tiger'S Eye, Baguette, Opaque

16 x 12 mm (calibrated)

$ 15.32

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1.55ct Green Tourmaline, Oval, Transparent

1.55ct Green Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 26.58

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11.47ct Brown Tiger'S Eye, Baguette, Opaque

11.47ct Brown Tiger'S Eye, Baguette, Opaque

16 x 12 mm (calibrated)

$ 14.85

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0.23ct Black Diamond, Round, Opaque

0.23ct Black Diamond, Round, Opaque

3.5 mm (calibrated)

$ 109.41

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0.86ct Orange Zircon, Oval, VVS

0.86ct Orange Zircon, Oval, VVS

6 x 4 mm (calibrated)

$ 12.85

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25.77ct Green Jade, Fancy, Translucent

25.77ct Green Jade, Fancy, Translucent

30.9 x 14.1 mm

$ 16.09

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20.60ct Yellow Aventurine, Fancy, Opaque

20.60ct Yellow Aventurine, Fancy, Opaque

31.2 x 9.3 mm

$ 6.16

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2.51ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.51ct Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 7 mm (calibrated)

$ 49.50

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18.75ct Multicolor Agate, Oval, Opaque

18.75ct Multicolor Agate, Oval, Opaque

15.9 x 14.3 mm

$ 18.68

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3.50ct Green Fluorite, Pear Shape, Transparent

3.50ct Green Fluorite, Pear Shape, Transparent

12 x 8 mm (calibrated)

$ 14.92

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5.85ct Brown Tiger'S Eye, Oval, Opaque

5.85ct Brown Tiger'S Eye, Oval, Opaque

14 x 10 mm (calibrated)

$ 5.83

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8.10ct Blue Hemimorphite Druzy, Fancy, Opaque
Hemimorphite Druzy Product Video (439652)

8.10ct Blue Hemimorphite Druzy, Fancy, Opaque

14 x 12 mm (calibrated)

$ 133.12

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4.97ct Yellow Citrine, Oval, VVS

4.97ct Yellow Citrine, Oval, VVS

12.9 x 8.5 mm

$ 30.11

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0.52ct Green Chrome Diopside, Oval, VS

0.52ct Green Chrome Diopside, Oval, VS

6 x 4 mm (calibrated)

$ 12.95

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14.55ct Black Nuummite, Oval, Opaque

14.55ct Black Nuummite, Oval, Opaque

21 x 11.1 mm

$ 63.91

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16.92ct Violet Amethyst, Oval, VS

16.92ct Violet Amethyst, Oval, VS

20 x 15 mm (calibrated)

$ 112.35

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2.43ct Yellow Apatite, Emerald Cut, VS
Apatite Product Video (439262)

2.43ct Yellow Apatite, Emerald Cut, VS

8 x 8 mm (calibrated)

$ 125.13

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5.67ct Violet Amethyst, Pear Shape, Transparent

5.67ct Violet Amethyst, Pear Shape, Transparent

14.6 x 10.9 mm

$ 33.88

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0.93ct Pink Tourmaline, Emerald Cut, VS
Tourmaline Product Video (538011)

0.93ct Pink Tourmaline, Emerald Cut, VS

8.9 x 3.9 mm

$ 70.31

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0.54ct Green Peridot, Marquise, VS

0.54ct Green Peridot, Marquise, VS

7.7 x 3.7 mm

$ 8.07

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1.22ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

1.22ct Yellow Color-Change Diaspore, Pear Shape, VVS-VS

10.1 x 5 mm

$ 42.77

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

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

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
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.

Posted By Ktreva52 in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate
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