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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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9.97ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

9.97ct Multicolor Rainbow Pyrite, Pear Shape, Opaque

18.8 x 12.8 mm

$ 29.79

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4.42ctw Multicolor Spectrolite, Oval, Opaque

4.42ctw Multicolor Spectrolite, Oval, Opaque

10 x 8 mm (calibrated)

$ 16.84

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6.45ct Orange Spessartite Garnet, Pear Shape, Transparent

6.45ct Orange Spessartite Garnet, Pear Shape, Transparent

10.3 x 9.6 mm

$ 160.61

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2.18ctw Multicolor Labradorite, Round, Translucent

2.18ctw Multicolor Labradorite, Round, Translucent

6 mm (calibrated)

$ 2.61

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18.89ct Green Opal, Cushion, Opaque

18.89ct Green Opal, Cushion, Opaque

20.8 x 16.9 mm

$ 43.82

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1.94ct Orange Hessonite Garnet, Emerald Cut, SI

1.94ct Orange Hessonite Garnet, Emerald Cut, SI

8 x 6 mm (calibrated)

$ 32.01

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0.73ct Green Peridot, Pear Shape, VVS-VS

0.73ct Green Peridot, Pear Shape, VVS-VS

6.9 x 4.8 mm

$ 5.09

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5.16ct Green Fluorite, Oval, Transparent

5.16ct Green Fluorite, Oval, Transparent

11.9 x 9 mm

$ 22.61

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1.15ct Pink Strawberry Quartz, Round, Transparent

1.15ct Pink Strawberry Quartz, Round, Transparent

7 mm (calibrated)

$ 10.08

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4.26ctw Red Almandine Garnet, Oval, VVS-VS

4.26ctw Red Almandine Garnet, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 159.11

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1.88ctw Blue Kyanite, Oval, SI

1.88ctw Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 51.49

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2.31ct Red Almandine Garnet, Oval, VS

2.31ct Red Almandine Garnet, Oval, VS

9 x 7 mm (calibrated)

$ 86.28

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6.17ct Pink Rose Quartz, Emerald Cut, Transparent

6.17ct Pink Rose Quartz, Emerald Cut, Transparent

11 x 11 mm (calibrated)

$ 33.91

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1.34ct Orange Hessonite Garnet, Oval, VS

1.34ct Orange Hessonite Garnet, Oval, VS

7.3 x 6 mm

$ 20.48

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5.37ct Multicolor Dendritic Agate, Pear Shape, Translucent
Dendritic Agate Product Video (744388)

5.37ct Multicolor Dendritic Agate, Pear Shape, Translucent

19.6 x 14.2 mm

$ 19.07

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1.16ctw Yellow Citrine, Marquise, VVS-VS

1.16ctw Yellow Citrine, Marquise, VVS-VS

6 x 3.1 mm

$ 12.62

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73.11ct Violet Charoite, Fancy, Opaque
Charoite Product Video (344685)

73.11ct Violet Charoite, Fancy, Opaque

33.2 x 26.3 mm

$ 120.15

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8.00ct Multicolor Agate, Fancy, Opaque

8.00ct Multicolor Agate, Fancy, Opaque

10.4 x 10 mm

$ 7.57

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0.13ctw Black Diamond, Square, Opaque

0.13ctw Black Diamond, Square, Opaque

2 x 2 mm (calibrated)

$ 64.74

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0.72ct Pink Malaya Garnet, Cushion, VS

0.72ct Pink Malaya Garnet, Cushion, VS

6 x 4 mm (calibrated)

$ 28.68

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0.78ctw Green Demantoid Garnet, Round, VS

0.78ctw Green Demantoid Garnet, Round, VS

3 mm (calibrated)

$ 113.71

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18.06ctw Gray Hematite, Oval, Opaque

18.06ctw Gray Hematite, Oval, Opaque

18.1 x 9 mm

$ 17.61

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5.39ct Green Prehnite, Fancy, Translucent

5.39ct Green Prehnite, Fancy, Translucent

16.9 x 10.5 mm

$ 8.86

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5.40ct Blue Chalcedony, Cushion, Translucent

5.40ct Blue Chalcedony, Cushion, Translucent

12 x 12 mm (calibrated)

$ 16.81

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

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen 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 -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.

Posted By HVeeder in February, 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
→ View All GemSelect Reviews on Bizrate
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