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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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1.87ctw Yellow Morganite, Oval, VS

1.87ctw Yellow Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 66.90

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25.28ctw Black Spinel, Baguette, Opaque
Spinel Product Video (374181)

25.28ctw Black Spinel, Baguette, Opaque

17.6 x 8.2 mm

$ 199.96

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0.57ct Pink Morganite, Oval, VS-SI

0.57ct Pink Morganite, Oval, VS-SI

6.8 x 4.7 mm

$ 34.35

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2.81ctw White Topaz, Cushion, VVS-VS

2.81ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 15.40

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0.61ct Pink Morganite, Round, VS

0.61ct Pink Morganite, Round, VS

5.5 mm (calibrated)

$ 27.34

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0.21ct Turquoise Aquamarine, Pear Shape, VS

0.21ct Turquoise Aquamarine, Pear Shape, VS

4 x 4 mm (calibrated)

$ 29.28

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0.33ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

0.33ct Yellow Chrysoberyl Cat'S Eye, Oval, Translucent

4.5 x 3.3 mm

$ 9.86

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0.06ct White Diamond, Marquise, VVS

0.06ct White Diamond, Marquise, VVS

4 x 2 mm (calibrated)

$ 208.54

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0.55ct Pink Spinel, Cushion, VS

0.55ct Pink Spinel, Cushion, VS

4.9 x 4.5 mm

$ 38.35

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0.67ct Gray Spinel, Cushion, VVS-VS

0.67ct Gray Spinel, Cushion, VVS-VS

5.9 x 4.5 mm

$ 55.61

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0.49ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.49ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.3 x 3.7 mm

$ 81.34

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6.10ct Pink Morganite, Pear Shape, Translucent

6.10ct Pink Morganite, Pear Shape, Translucent

15.2 x 11.1 mm

$ 25.32

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0.64ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.64ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.2 x 4.1 mm

$ 132.80

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0.22ct Black Diamond, Round, Opaque

0.22ct Black Diamond, Round, Opaque

3.5 mm (calibrated)

$ 104.66

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0.72ct Gray Cat'S Eye Alexandrite, Oval, Opaque

0.72ct Gray Cat'S Eye Alexandrite, Oval, Opaque

5.5 x 4 mm

$ 144.00

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0.71ct Gray Spinel, Oval, VVS-VS

0.71ct Gray Spinel, Oval, VVS-VS

5.9 x 5.2 mm

$ 58.93

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1.27ct Yellow Beryl, Oval, VVS-VS

1.27ct Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 27.83

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0.89ct Pink Morganite, Pear Shape, VVS

0.89ct Pink Morganite, Pear Shape, VVS

9.4 x 4.7 mm

$ 53.63

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3.08ct Pink Spinel, Marquise, VVS
Spinel Product Video (750134)

3.08ct Pink Spinel, Marquise, VVS

14 x 7 mm (calibrated)

$ 7,413.56

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1.17ct Yellow Beryl, Oval, VS

1.17ct Yellow Beryl, Oval, VS

8 x 6 mm (calibrated)

$ 23.31

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0.93ct Purple Spinel, Cushion, VS

0.93ct Purple Spinel, Cushion, VS

5.4 x 5.2 mm

$ 46.31

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12.20ctw White Topaz, Cushion, VS

12.20ctw White Topaz, Cushion, VS

12 x 10 mm (calibrated)

$ 81.01

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6.83ct Pink Morganite, Pear Shape, Transparent

6.83ct Pink Morganite, Pear Shape, Transparent

15 x 10 mm (calibrated)

$ 74.83

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0.56ct Purple Spinel, Cushion, VS

0.56ct Purple Spinel, Cushion, VS

6 x 4 mm (calibrated)

$ 39.04

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

Easy and functional

Posted By Dessa in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Very pleasant

Posted By Varun in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

overall great

Posted By SR in April, 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
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image