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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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7.23ct Pink Morganite, Pear Shape, Transparent

7.23ct Pink Morganite, Pear Shape, Transparent

17 x 11.1 mm

$ 79.22

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30.70ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

30.70ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

34.2 x 16.1 mm

$ 30.58

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0.94ct Yellow Citrine, Square, VVS-VS

0.94ct Yellow Citrine, Square, VVS-VS

6 x 6 mm (calibrated)

$ 6.56

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2.70ct Pink Tourmaline, Oval, Transparent

2.70ct Pink Tourmaline, Oval, Transparent

9 x 7 mm (calibrated)

$ 49.29

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3.51ct Pink Morganite, Marquise, Translucent

3.51ct Pink Morganite, Marquise, Translucent

14.9 x 7 mm

$ 38.45

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6.71ct Pink Rose Quartz, Flower Cut, Transparent

6.71ct Pink Rose Quartz, Flower Cut, Transparent

14.2 x 10.2 mm

$ 26.69

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1.17ct Yellow Beryl, Trillion, VVS

1.17ct Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 23.31

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11.71ct Violet Amethyst, Cushion, VVS

11.71ct Violet Amethyst, Cushion, VVS

18 x 13 mm (calibrated)

$ 93.31

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8.68ctw Black Spinel, Round, Opaque

8.68ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 33.28

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0.89ct Brown Kornerupine, Oval, VVS-VS

0.89ct Brown Kornerupine, Oval, VVS-VS

7.6 x 5.7 mm

$ 48.75

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1.66ct Pink Strawberry Quartz, Round, Translucent

1.66ct Pink Strawberry Quartz, Round, Translucent

8 mm (calibrated)

$ 12.73

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18.83ct Multicolor Opal, Oval, Opaque
Opal Product Video (744018)

18.83ct Multicolor Opal, Oval, Opaque

22.7 x 15.5 mm

$ 937.73

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1.31ctw Red Rhodolite Garnet, Square, VS

1.31ctw Red Rhodolite Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.47

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2.57ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

2.57ctw Orange Hessonite Garnet, Emerald Cut, VS-SI

7 x 5 mm (calibrated)

$ 39.43

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3.57ct Multicolor Coral, Oval, Translucent

3.57ct Multicolor Coral, Oval, Translucent

15.2 x 10.8 mm

$ 11.74

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0.85ct Pink Tourmaline, Round, Transparent

0.85ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 33.86

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16.64ctw Pink Coral, Fancy, Opaque
Coral Product Video (333653)

16.64ctw Pink Coral, Fancy, Opaque

15.3 x 10.7 mm

$ 200.54

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1.27ct Multicolor Opal, Oval, Translucent

1.27ct Multicolor Opal, Oval, Translucent

10 x 8 mm (calibrated)

$ 55.66

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1.94ct Green Sphene, Oval, Transparent

1.94ct Green Sphene, Oval, Transparent

8.5 x 6.8 mm

$ 9.66

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9.73ctw Green Prehnite, Fancy, Translucent

9.73ctw Green Prehnite, Fancy, Translucent

15 x 10 mm (calibrated)

$ 15.99

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1.91ct Orange Hessonite Garnet, Cushion, VS-SI

1.91ct Orange Hessonite Garnet, Cushion, VS-SI

7 x 7 mm (calibrated)

$ 28.47

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9.25ct Multicolor Cinnabar, Round, Opaque

9.25ct Multicolor Cinnabar, Round, Opaque

16 mm (calibrated)

$ 10.82

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40.93ct Violet Amethyst, Oval, VVS-VS
Amethyst Product Video (751303)

40.93ct Violet Amethyst, Oval, VVS-VS

22.6 x 18.4 mm

$ 271.78

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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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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 -> 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

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
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Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
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Overall Rating -> 10 star ratings

All good

Posted By DouscheGift in August, 2025
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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 -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate
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