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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
Single
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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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4.50ctw White Topaz, Cushion, VVS-VS

4.50ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 24.65

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5.18ctw White Topaz, Cushion, VS

5.18ctw White Topaz, Cushion, VS

4.6 x 4.6 mm

$ 28.38

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1.01ct Yellow Beryl, Oval, VVS-VS

1.01ct Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 20.12

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0.45ct Purple Spinel, Cushion, VVS-VS

0.45ct Purple Spinel, Cushion, VVS-VS

4.8 x 4.1 mm

$ 31.37

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26.87ctw Black Spinel, Oval, Opaque

26.87ctw Black Spinel, Oval, Opaque

18 x 13 mm (calibrated)

$ 88.31

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5.52ctw White Topaz, Emerald Cut, VS

5.52ctw White Topaz, Emerald Cut, VS

8 x 8 mm (calibrated)

$ 30.24

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1.16ct Pink Morganite, Round, VS

1.16ct Pink Morganite, Round, VS

7 mm (calibrated)

$ 45.06

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0.21ct Pink Morganite, Round, VVS-VS

0.21ct Pink Morganite, Round, VVS-VS

4 mm (calibrated)

$ 8.72

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1.35ct Violet Spinel, Cushion, VS

1.35ct Violet Spinel, Cushion, VS

6.3 x 6.2 mm

$ 101.76

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12.39ct Blue Aquamarine, Oval, Translucent

12.39ct Blue Aquamarine, Oval, Translucent

18 x 13 mm (calibrated)

$ 257.09

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2.02ctw Multicolor Andalusite, Round, VS

2.02ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 107.92

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6.13ct White Topaz, Oval, VVS

6.13ct White Topaz, Oval, VVS

12 x 10 mm (calibrated)

$ 40.70

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1.34ct Purple Sapphire, Cushion, VS
Sapphire Product Video (447698)

1.34ct Purple Sapphire, Cushion, VS

6.5 x 5.3 mm

$ 642.42

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1.49ct Purple Spinel, Cushion, VS

1.49ct Purple Spinel, Cushion, VS

6.7 x 6.4 mm

$ 247.34

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3.02ctw Yellow Golden Beryl, Oval, VS

3.02ctw Yellow Golden Beryl, Oval, VS

9.2 x 6.7 mm

$ 66.18

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2.70ct Pink Morganite, Pear Shape, Transparent

2.70ct Pink Morganite, Pear Shape, Transparent

12 x 8 mm (calibrated)

$ 29.58

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2.95ctw White Topaz, Cushion, VVS-VS

2.95ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 16.17

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0.76ct Green Cat'S Eye Alexandrite, Oval, Opaque

0.76ct Green Cat'S Eye Alexandrite, Oval, Opaque

6.1 x 4.3 mm

$ 157.70

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2.20ctw Multicolor Andalusite, Round, VS

2.20ctw Multicolor Andalusite, Round, VS

4 mm (calibrated)

$ 108.46

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7.19ctw Black Spinel, Round, Opaque

7.19ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 23.64

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1.95ct Yellow Rutile Topaz, Oval, Transparent

1.95ct Yellow Rutile Topaz, Oval, Transparent

8.9 x 6.6 mm

$ 40.46

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0.42ct Black Diamond, Square, Opaque

0.42ct Black Diamond, Square, Opaque

3.6 x 3.4 mm

$ 209.16

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1.38ct Yellow Golden Beryl, Oval, VS

1.38ct Yellow Golden Beryl, Oval, VS

9 x 7 mm (calibrated)

$ 33.27

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

Love how easy the site is to use. Really love that the pictures are of actual product.

Posted By LeAnn in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Fast and reliable service.

Posted By Zæck in December, 2025
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Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
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Overall Rating -> 9 star ratings

Fast snd easy to find what I was looking for

Posted By Bawb in May, 2026
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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

The site provided lots of detail, factual data, and good photos. I also like the availability of searching by price range as well as by the type of stone.

Posted By SLIntuitive Donna in July, 2025
Source: Bizrate
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