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Home › Gemstones › Natural Untreated Gemstones

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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6.68ct Brown Star Moonstone, Oval, Translucent

6.68ct Brown Star Moonstone, Oval, Translucent

13.1 x 11.9 mm

$ 21.95

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10.74ct Brown Tiger'S Eye, Baguette, Opaque

10.74ct Brown Tiger'S Eye, Baguette, Opaque

16 x 12 mm (calibrated)

$ 13.90

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0.65ct Yellow Color-Change Diaspore, Oval, VVS-VS

0.65ct Yellow Color-Change Diaspore, Oval, VVS-VS

6.4 x 4.6 mm

$ 22.82

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6.76ct Green Prehnite, Fancy, Translucent

6.76ct Green Prehnite, Fancy, Translucent

13.9 x 10.2 mm

$ 9.25

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0.62ct Green Peridot, Oval, VS

0.62ct Green Peridot, Oval, VS

6 x 4 mm (calibrated)

$ 11.11

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7.52ct Multicolor Rainbow Pyrite, Fancy, Opaque

7.52ct Multicolor Rainbow Pyrite, Fancy, Opaque

21.1 x 13.6 mm

$ 19.47

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2.25ct Turquoise Grandidierite, Pear Shape, Translucent

2.25ct Turquoise Grandidierite, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 123.26

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4.22ct Red Almandine Garnet, Oval, VVS-VS

4.22ct Red Almandine Garnet, Oval, VVS-VS

11 x 9 mm (calibrated)

$ 147.11

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22.83ct Yellow Obsidian, Pear Shape, Opaque

22.83ct Yellow Obsidian, Pear Shape, Opaque

28.4 x 22.8 mm

$ 20.01

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33.38ctw Multicolor Fossil Coral, Cushion, Opaque

33.38ctw Multicolor Fossil Coral, Cushion, Opaque

20.3 x 13.2 mm

$ 54.86

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22.34ct White Rainbow Moonstone, Oval, Translucent

22.34ct White Rainbow Moonstone, Oval, Translucent

26.3 x 13.8 mm

$ 22.25

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2.72ct Violet Amethyst, Trillion, VVS-VS

2.72ct Violet Amethyst, Trillion, VVS-VS

10 x 10 mm (calibrated)

$ 18.97

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10.65ct Black Tourmaline, Oval, Opaque

10.65ct Black Tourmaline, Oval, Opaque

15.1 x 12.4 mm

$ 53.04

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5.46ct White Topaz, Oval, VVS-VS

5.46ct White Topaz, Oval, VVS-VS

11.2 x 10 mm

$ 32.63

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24.84ct Turquoise Amazonite, Oval, Translucent

24.84ct Turquoise Amazonite, Oval, Translucent

29.9 x 16.1 mm

$ 21.77

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1.13ct Yellow Sillimanite, Oval, VVS-VS

1.13ct Yellow Sillimanite, Oval, VVS-VS

8 x 6 mm (calibrated)

$ 43.33

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4.91ct Yellow Citrine, Oval, VVS

4.91ct Yellow Citrine, Oval, VVS

12.8 x 10.1 mm

$ 29.75

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0.64ct Pink Tourmaline, Round, Transparent

0.64ct Pink Tourmaline, Round, Transparent

5 mm (calibrated)

$ 25.50

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11.45ct Green Maw-Sit-Sit, Baguette, Opaque

11.45ct Green Maw-Sit-Sit, Baguette, Opaque

13 x 10 mm

$ 37.64

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2.33ct Orange Hessonite Garnet, Cushion, VVS-VS

2.33ct Orange Hessonite Garnet, Cushion, VVS-VS

8 x 6 mm (calibrated)

$ 46.41

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5.89ct Pink Strawberry Quartz, Oval, Translucent

5.89ct Pink Strawberry Quartz, Oval, Translucent

14 x 10 mm (calibrated)

$ 35.50

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1.16ct Purple Sapphire, Cushion, VS
Sapphire Product Video (448533)

1.16ct Purple Sapphire, Cushion, VS

6.5 x 4.8 mm

$ 612.57

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5.62ct Green Prehnite, Fancy, Translucent

5.62ct Green Prehnite, Fancy, Translucent

15.3 x 10.9 mm

$ 9.23

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2.08ctw Yellow Citrine, Pear Shape, VVS-VS

2.08ctw Yellow Citrine, Pear Shape, VVS-VS

9 x 6 mm (calibrated)

$ 15.94

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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 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
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

It was a good interaction I got a good gemstone for cheap

Posted By Jon in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a rock that met my need. Bought it!

Posted By Skot in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

the selection is good as are the prices

Posted By Old man in August, 2025
Source: Bizrate
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