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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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0.86ct Pink Spinel, Cushion, VVS-VS

0.86ct Pink Spinel, Cushion, VVS-VS

5.6 x 4.9 mm

$ 30.74

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0.66ct Red Spinel, Cushion, VS

0.66ct Red Spinel, Cushion, VS

5.1 x 4.3 mm

$ 46.02

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17.48ctw Black Spinel, Heart, Opaque

17.48ctw Black Spinel, Heart, Opaque

13 x 13 mm (calibrated)

$ 57.45

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3.40ct White Topaz, Round, VVS-VS

3.40ct White Topaz, Round, VVS-VS

8.5 mm (calibrated)

$ 26.08

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2.91ctw White Topaz, Cushion, VVS-VS

2.91ctw White Topaz, Cushion, VVS-VS

4.6 x 4.6 mm

$ 15.94

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0.67ct Purple Spinel, Cushion, VS

0.67ct Purple Spinel, Cushion, VS

5.7 x 4.9 mm

$ 46.71

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1.32ctw White Topaz, Oval, VVS

1.32ctw White Topaz, Oval, VVS

6 x 4 mm (calibrated)

$ 9.20

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0.02ct Black Diamond, Round, Opaque

0.02ct Black Diamond, Round, Opaque

2 mm (calibrated)

$ 15.94

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2.67ct Yellow Rutile Topaz, Pear Shape, Transparent

2.67ct Yellow Rutile Topaz, Pear Shape, Transparent

13.5 x 6.8 mm

$ 55.40

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2.17ctw Yellow Beryl, Oval, VVS-VS

2.17ctw Yellow Beryl, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 43.23

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0.67ct Pink Spinel, Cushion, VS

0.67ct Pink Spinel, Cushion, VS

5.4 x 4.4 mm

$ 46.71

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1.28ct Purple Spinel, Cushion, VVS

1.28ct Purple Spinel, Cushion, VVS

7.1 x 5.4 mm

$ 127.49

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0.09ctw Black Diamond, Round, Opaque

0.09ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 71.71

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2.87ct Yellow Beryl, Oval, VVS-VS

2.87ct Yellow Beryl, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 68.61

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1.23ct Yellow Rutile Topaz, Pear Shape, Transparent

1.23ct Yellow Rutile Topaz, Pear Shape, Transparent

8.9 x 5.7 mm

$ 25.52

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1.05ct Purple Spinel, Oval, VS-SI

1.05ct Purple Spinel, Oval, VS-SI

7 x 5 mm (calibrated)

$ 112.17

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2.56ctw White Topaz, Cushion, VVS-VS

2.56ctw White Topaz, Cushion, VVS-VS

4.6 x 4.5 mm

$ 14.03

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1.19ct Purple Sapphire, Cushion, VS
Sapphire Product Video (448496)

1.19ct Purple Sapphire, Cushion, VS

6.4 x 5.6 mm

$ 628.42

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9.00ctw Black Spinel, Round, Opaque

9.00ctw Black Spinel, Round, Opaque

10 mm (calibrated)

$ 34.51

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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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27.19ctw Black Spinel, Fancy, Opaque

27.19ctw Black Spinel, Fancy, Opaque

18.2 x 11.8 mm

$ 148.95

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1.59ct Yellow Beryl, Round, VVS

1.59ct Yellow Beryl, Round, VVS

8 mm (calibrated)

$ 31.67

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4.26ct Pink Morganite, Pear Shape, Transparent

4.26ct Pink Morganite, Pear Shape, Transparent

16 x 8 mm (calibrated)

$ 46.67

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1.09ct Purple Spinel, Cushion, VVS-VS

1.09ct Purple Spinel, Cushion, VVS-VS

6.1 x 5.4 mm

$ 130.28

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!

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It was all good

Posted By Debsarabs in February, 2026
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Love, and have always loved, your website.

Posted By Aberabic in July, 2025
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Overall Rating -> 10 star ratings

Great selection of gems at a reasonable price

Posted By Curt in July, 2025
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Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
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Overall Rating -> 10 star ratings

I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
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Overall Rating -> 9 star ratings

I think therea's no problem

Posted By Napoleon in August, 2025
Source: Bizrate
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