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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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4.01ct Yellow Citrine, Oval, VS

4.01ct Yellow Citrine, Oval, VS

12 x 10 mm (calibrated)

$ 21.97

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3.49ct Yellow Apatite, Oval, VS

3.49ct Yellow Apatite, Oval, VS

11 x 9 mm (calibrated)

$ 114.71

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10.33ct Yellow Rutile Quartz, Sphere / Ball, Transparent

10.33ct Yellow Rutile Quartz, Sphere / Ball, Transparent

11 mm (calibrated)

$ 11.31

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0.81ct Blue Kyanite, Pear Shape, SI

0.81ct Blue Kyanite, Pear Shape, SI

7 x 4.7 mm

$ 16.87

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12.74ct Brown Smoky Quartz, Round, Transparent

12.74ct Brown Smoky Quartz, Round, Transparent

16 mm (calibrated)

$ 41.87

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5.77ctw Yellow Citrine, Oval, VVS

5.77ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 31.61

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7.56ct Multicolor Rainbow Pyrite, Fancy, Opaque

7.56ct Multicolor Rainbow Pyrite, Fancy, Opaque

25.9 x 9.8 mm

$ 22.59

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0.72ctw Yellow Citrine, Oval, VS

0.72ctw Yellow Citrine, Oval, VS

6 x 4 mm (calibrated)

$ 4.73

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18.27ct Blue Chalcedony, Cushion, Opaque

18.27ct Blue Chalcedony, Cushion, Opaque

19.9 x 18.1 mm

$ 45.50

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1.40ct Multicolor Opal, Pear Shape, Transparent

1.40ct Multicolor Opal, Pear Shape, Transparent

11.1 x 8 mm

$ 65.95

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9.91ctw Green Prehnite, Pear Shape, Transparent

9.91ctw Green Prehnite, Pear Shape, Transparent

10 x 7 mm (calibrated)

$ 30.41

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5.42ct Yellow Citrine, Oval, VVS

5.42ct Yellow Citrine, Oval, VVS

14 x 10 mm (calibrated)

$ 32.54

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8.47ct Green Prehnite, Fancy, Translucent

8.47ct Green Prehnite, Fancy, Translucent

17.1 x 11.1 mm

$ 13.93

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4.39ct Green Malachite, Oval, Opaque

4.39ct Green Malachite, Oval, Opaque

10.5 x 8.3 mm

$ 4.37

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0.74ct Green Sphene, Oval, VVS-VS

0.74ct Green Sphene, Oval, VVS-VS

7.1 x 4.5 mm

$ 44.59

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0.88ctw Yellow Citrine, Heart, VVS-VS

0.88ctw Yellow Citrine, Heart, VVS-VS

5 x 5 mm (calibrated)

$ 7.01

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0.86ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

0.86ct Yellow Color-Change Diaspore, Emerald Cut, VVS-VS

5.3 x 5.1 mm

$ 26.39

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1.43ct Red Tourmaline, Oval, Transparent

1.43ct Red Tourmaline, Oval, Transparent

7.6 x 5.8 mm

$ 24.51

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0.85ct Yellow Color-Change Diaspore, Oval, VS

0.85ct Yellow Color-Change Diaspore, Oval, VS

6.4 x 5.4 mm

$ 30.25

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4.82ct Turquoise Hemimorphite Druzy, Fancy, Opaque

4.82ct Turquoise Hemimorphite Druzy, Fancy, Opaque

13 x 9 mm (calibrated)

$ 72.01

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3.53ct Violet Amethyst, Heart, VS

3.53ct Violet Amethyst, Heart, VS

10 x 10 mm (calibrated)

$ 27.69

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3.56ct Pink Strawberry Quartz, Round, Translucent

3.56ct Pink Strawberry Quartz, Round, Translucent

9 mm (calibrated)

$ 21.76

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1.44ct Pink Tourmaline, Oval, Transparent

1.44ct Pink Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 24.68

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10.41ct Multicolor Opal, Pear Shape, Opaque

10.41ct Multicolor Opal, Pear Shape, Opaque

19.8 x 16 mm

$ 259.21

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

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

Fast and reliable service.

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

selection was broad and the check out was quick. Great site

Posted By JC Karl in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

IT WAS GREAT SIMPLE I WAS ABLE TO MAKE AN ACCOUNT EASY AND WAS ABLE TO FAVORITE ALL OF MY FINAL SELECTED GEMS, I JUST LOVE IT.

Posted By YE in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Web site is very simple to navigate Selection is terrific

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

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate
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