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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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1.50ct Yellow Beryl, Cushion, VS

1.50ct Yellow Beryl, Cushion, VS

9 x 7 mm (calibrated)

$ 35.86

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14.66ctw Black Spinel, Heart, Opaque

14.66ctw Black Spinel, Heart, Opaque

12 x 12 mm (calibrated)

$ 87.64

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22.11ctw Black Spinel, Oval, Opaque

22.11ctw Black Spinel, Oval, Opaque

16 x 12 mm (calibrated)

$ 72.67

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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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1.36ct Brown Diamond, Emerald Cut, VS-SI
Diamond Product Video (460454)

1.36ct Brown Diamond, Emerald Cut, VS-SI

5.9 x 5.5 mm

$ 3,129.03

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3.99ctw Multicolor Andalusite, Round, VS
Andalusite Product Video (381952)

3.99ctw Multicolor Andalusite, Round, VS

4 mm (calibrated)

$ 146.05

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1.02ct Yellow Morganite, Oval, VS

1.02ct Yellow Morganite, Oval, VS

8 x 6 mm (calibrated)

$ 40.14

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0.15ctw Black Diamond, Square, Opaque

0.15ctw Black Diamond, Square, Opaque

2 x 2 mm (calibrated)

$ 74.70

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0.40ct Pink Morganite, Round, VS-SI

0.40ct Pink Morganite, Round, VS-SI

5 mm (calibrated)

$ 16.60

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0.07ctw Black Diamond, Round, Opaque

0.07ctw Black Diamond, Round, Opaque

2 mm (calibrated)

$ 20.34

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0.53ct Pink Spinel, Cushion, VVS-VS

0.53ct Pink Spinel, Cushion, VVS-VS

4.7 x 4.3 mm

$ 36.95

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0.12ct Green Alexandrite, Oval, VVS-VS

0.12ct Green Alexandrite, Oval, VVS-VS

4 x 3 mm (calibrated)

$ 83.66

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5.26ct Turquoise Aquamarine, Cushion, Translucent
Aquamarine Product Video (730259)

5.26ct Turquoise Aquamarine, Cushion, Translucent

14 x 10 mm (calibrated)

$ 109.15

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3.09ct Pink Morganite, Oval, Transparent

3.09ct Pink Morganite, Oval, Transparent

11.1 x 8.5 mm

$ 35.51

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1.10ct Purple Spinel, Cushion, VVS-VS

1.10ct Purple Spinel, Cushion, VVS-VS

6.7 x 5.9 mm

$ 109.56

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15.75ctw Black Spinel, Oval, Opaque

15.75ctw Black Spinel, Oval, Opaque

14 x 10 mm (calibrated)

$ 51.78

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2.61ctw White Topaz, Cushion, VVS-VS

2.61ctw White Topaz, Cushion, VVS-VS

4.5 x 4.5 mm

$ 14.30

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0.06ct Black Diamond, Round, Opaque

0.06ct Black Diamond, Round, Opaque

2.3 mm (calibrated)

$ 19.54

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4.21ctw White Topaz, Square, VS

4.21ctw White Topaz, Square, VS

4 x 4 mm (calibrated)

$ 32.29

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0.99ct Yellow Morganite, Cushion, VS

0.99ct Yellow Morganite, Cushion, VS

6 x 6 mm (calibrated)

$ 59.66

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0.09ct Green Alexandrite, Pear Shape, VS

0.09ct Green Alexandrite, Pear Shape, VS

3.3 x 2.5 mm

$ 62.75

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2.67ct Yellow Rutile Topaz, Trillion, Transparent

2.67ct Yellow Rutile Topaz, Trillion, Transparent

9 x 8.6 mm

$ 55.40

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6.64ctw White Topaz, Oval, VVS-VS

6.64ctw White Topaz, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 36.37

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4.17ctw White Topaz, Cushion, VVS-VS

4.17ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 22.85

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 picking, fast checkout, secure shipping. Cana't ask for anything more than efficiency and a good price.

Posted By Beman in September, 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 -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
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

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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