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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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0.61ct Pink Spinel, Cushion, SI-I1
Spinel Product Video (691805)

0.61ct Pink Spinel, Cushion, SI-I1

4.8 x 4 mm

$ 415.00

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0.53ct Green Cat'S Eye Alexandrite, Round, Opaque

0.53ct Green Cat'S Eye Alexandrite, Round, Opaque

4.5 mm (calibrated)

$ 109.98

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13.95ctw Black Spinel, Heart, Opaque

13.95ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 76.43

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0.93ct Yellow Morganite, Cushion, VS

0.93ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 56.04

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1.09ct Purple Spinel, Cushion, VVS-VS

1.09ct Purple Spinel, Cushion, VVS-VS

6.4 x 5.5 mm

$ 73.81

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0.94ct Yellow Beryl, Oval, VVS-VS

0.94ct Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 18.72

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14.57ctw Black Spinel, Cushion, Opaque

14.57ctw Black Spinel, Cushion, Opaque

12 x 10 mm (calibrated)

$ 79.82

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1.48ct Yellow Beryl, Round, VVS

1.48ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 29.48

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0.99ct Yellow Beryl, Oval, VVS-VS

0.99ct Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 19.72

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4.16ctw White Topaz, Square, VS

4.16ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 31.91

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0.42ct Pink Morganite, Round, VS-SI

0.42ct Pink Morganite, Round, VS-SI

5 mm (calibrated)

$ 17.43

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0.44ct Gray Chrysoberyl Cat'S Eye, Round, Opaque

0.44ct Gray Chrysoberyl Cat'S Eye, Round, Opaque

4 mm (calibrated)

$ 13.93

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1.40ct Pink Morganite, Pear Shape, VVS

1.40ct Pink Morganite, Pear Shape, VVS

9 x 7 mm (calibrated)

$ 122.71

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0.47ct Red Spinel, Pear Shape, VS

0.47ct Red Spinel, Pear Shape, VS

6.4 x 4.2 mm

$ 39.01

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0.99ct Pink Morganite, Pear Shape, VVS-VS

0.99ct Pink Morganite, Pear Shape, VVS-VS

9 x 5.7 mm

$ 59.66

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0.10ct Green Alexandrite, Oval, VVS-VS

0.10ct Green Alexandrite, Oval, VVS-VS

3.4 x 2.6 mm

$ 69.72

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0.56ct White Topaz, Oval, VVS

0.56ct White Topaz, Oval, VVS

6 x 4.2 mm

$ 3.90

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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 15.94

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4.31ct Brown Rutile Topaz, Emerald Cut, Transparent
Rutile Topaz Product Video (753630)

4.31ct Brown Rutile Topaz, Emerald Cut, Transparent

11.6 x 7.8 mm

$ 89.43

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0.03ct Black Diamond, Round, Transparent

0.03ct Black Diamond, Round, Transparent

2 mm (calibrated)

$ 10.27

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0.68ct Purple Spinel, Round, VS

0.68ct Purple Spinel, Round, VS

5 mm (calibrated)

$ 29.23

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3.63ctw Multicolor Andalusite, Round, VS

3.63ctw Multicolor Andalusite, Round, VS

3.3 mm

$ 133.00

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21.70ctw Black Spinel, Oval, Opaque

21.70ctw Black Spinel, Oval, Opaque

16 x 12 mm (calibrated)

$ 71.32

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4.48ctw White Topaz, Cushion, VVS-VS

4.48ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 24.54

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 -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 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

Had a great experience and the prices are great

Posted By BuBx99 in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Loved the price and the quality and the certification options which is the main reason why I buy. The guarantee is also a great reason to use gem select.

Posted By Sal in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!

Posted By Lkcisneros in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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