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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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25.16ctw Black Spinel, Baguette, Opaque

25.16ctw Black Spinel, Baguette, Opaque

17.6 x 8.2 mm

$ 199.03

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1.50ct Yellow Beryl, Round, VVS

1.50ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 29.88

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0.63ct Yellow Beryl, Oval, VVS

0.63ct Yellow Beryl, Oval, VVS

7 x 5 mm (calibrated)

$ 12.55

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1.30ct Yellow Beryl, Trillion, VVS

1.30ct Yellow Beryl, Trillion, VVS

8 x 8 mm (calibrated)

$ 25.90

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1.51ct Pink Morganite, Pear Shape, VS

1.51ct Pink Morganite, Pear Shape, VS

9.6 x 6.3 mm

$ 115.80

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1.00ct Purple Spinel, Cushion, VS

1.00ct Purple Spinel, Cushion, VS

6.1 x 5.2 mm

$ 29.80

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1.39ct Yellow Chrysoberyl Cat'S Eye, Oval, Opaque

1.39ct Yellow Chrysoberyl Cat'S Eye, Oval, Opaque

6.2 x 4.6 mm

$ 41.53

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1.57ct Red Ruby, Emerald Cut, VVS-VS
Ruby Product Video (716884)

1.57ct Red Ruby, Emerald Cut, VVS-VS

8 x 5 mm (calibrated)

$ 5,212.40

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0.39ct Purple Spinel, Cushion, VVS-VS

0.39ct Purple Spinel, Cushion, VVS-VS

4.3 x 4.3 mm

$ 27.19

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0.62ct Gray Spinel, Oval, VVS-VS

0.62ct Gray Spinel, Oval, VVS-VS

5.9 x 4.2 mm

$ 51.46

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2.31ctw Pink Morganite, Oval, VS

2.31ctw Pink Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 95.87

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0.27ctw Black Diamond, Round, Opaque

0.27ctw Black Diamond, Round, Opaque

3 mm (calibrated)

$ 128.44

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1.15ct Green Chrysoberyl, Oval, VVS

1.15ct Green Chrysoberyl, Oval, VVS

6.7 x 5.2 mm

$ 111.74

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1.59ct Yellow Beryl, Trillion, VS

1.59ct Yellow Beryl, Trillion, VS

8 x 8 mm (calibrated)

$ 38.01

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0.63ct Purple Spinel, Cushion, VVS-VS

0.63ct Purple Spinel, Cushion, VVS-VS

4.8 x 4.5 mm

$ 43.92

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1.67ct Yellow Beryl, Oval, VVS-VS

1.67ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 31.88

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0.99ct Purple Spinel, Cushion, VVS

0.99ct Purple Spinel, Cushion, VVS

6.1 x 5.3 mm

$ 147.91

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1.74ct Yellow Beryl, Oval, VVS-VS

1.74ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 34.66

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 10.27

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0.01ct White Diamond, Round, VVS-VS

0.01ct White Diamond, Round, VVS-VS

1.3 mm (calibrated)

$ 13.02

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0.03ct Black Diamond, Round, Opaque

0.03ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 23.90

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0.30ct Pink Morganite, Round, VS

0.30ct Pink Morganite, Round, VS

4.5 mm (calibrated)

$ 12.45

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3.51ct White Topaz, Round, VVS-VS

3.51ct White Topaz, Round, VVS-VS

9.5 mm (calibrated)

$ 26.93

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1.34ct Yellow Beryl, Round, VVS

1.34ct Yellow Beryl, Round, VVS

7.5 mm (calibrated)

$ 26.69

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

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 -> 10 star ratings

I can pick and choose from large selection and find just what I need for .y projects, currently my cane.

Posted By Darkstar731 in July, 2025
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 -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great! Affordable

Posted By Spinellope in April, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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