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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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0.07ct Black Diamond, Round, Opaque
Diamond Product Video (702344)

0.07ct Black Diamond, Round, Opaque

2.5 mm (calibrated)

$ 20.60

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5.87ct Yellow Citrine, Oval, VVS-VS

5.87ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 35.25

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2.51ct Purple Rhodolite Garnet, Oval, VVS

2.51ct Purple Rhodolite Garnet, Oval, VVS

8.9 x 7.3 mm

$ 67.29

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10.54ct Brown Rutile Quartz, Pear Shape, Transparent

10.54ct Brown Rutile Quartz, Pear Shape, Transparent

17 x 13.6 mm

$ 28.88

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14.33ct Black Nuummite, Oval, Opaque

14.33ct Black Nuummite, Oval, Opaque

17.9 x 15.8 mm

$ 63.23

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50.58ct Brown Tiger'S Eye Matrix, Oval, Opaque

50.58ct Brown Tiger'S Eye Matrix, Oval, Opaque

37 x 21.6 mm

$ 50.38

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1.32ct Violet Amethyst, Marquise, VS

1.32ct Violet Amethyst, Marquise, VS

11.9 x 6 mm

$ 10.12

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2.54ct Orange Hessonite Garnet, Oval, VS-SI

2.54ct Orange Hessonite Garnet, Oval, VS-SI

9 x 7.4 mm

$ 44.83

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2.20ct Pink Strawberry Quartz, Oval, Transparent

2.20ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 16.34

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24.33ct Multicolor Matrix Opal, Cushion, Opaque

24.33ct Multicolor Matrix Opal, Cushion, Opaque

27.2 x 16.9 mm

$ 41.19

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51.17ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

51.17ct Multicolor Tiger'S Eye Matrix, Oval, Opaque

32.7 x 23.3 mm

$ 22.94

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41.22ct Green Bloodstone, Oval, Opaque

41.22ct Green Bloodstone, Oval, Opaque

28.6 x 21.2 mm

$ 61.59

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0.86ct Green Tourmaline, Emerald Cut, VS

0.86ct Green Tourmaline, Emerald Cut, VS

9.6 x 3.4 mm

$ 42.83

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0.41ct Multicolor Opal, Pear Shape, Transparent

0.41ct Multicolor Opal, Pear Shape, Transparent

7 x 5 mm (calibrated)

$ 10.21

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0.52ct Pink Morganite, Pear Shape, VS

0.52ct Pink Morganite, Pear Shape, VS

7 x 5 mm (calibrated)

$ 23.31

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1.36ct Green Tourmaline, Emerald Cut, VS

1.36ct Green Tourmaline, Emerald Cut, VS

12.5 x 3.7 mm

$ 67.73

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24.86ctw Multicolor Labradorite, Round, Translucent

24.86ctw Multicolor Labradorite, Round, Translucent

20 mm (calibrated)

$ 54.47

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0.85ct Green Tourmaline, Emerald Cut, VVS-VS

0.85ct Green Tourmaline, Emerald Cut, VVS-VS

13.4 x 3 mm

$ 21.17

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9.28ct Blue Aquamarine, Oval, Translucent

9.28ct Blue Aquamarine, Oval, Translucent

16.5 x 10.8 mm

$ 61.62

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0.93ct White Sillimanite Cat'S Eye, Oval, Transparent

0.93ct White Sillimanite Cat'S Eye, Oval, Transparent

5.8 x 5.7 mm

$ 3.58

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2.68ct Yellow Citrine, Oval, VVS-VS

2.68ct Yellow Citrine, Oval, VVS-VS

10 x 8 mm (calibrated)

$ 14.68

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1.27ct Green Peridot, Oval, VS

1.27ct Green Peridot, Oval, VS

8 x 6 mm (calibrated)

$ 18.97

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3.41ct Pink Rose Quartz, Emerald Cut, Transparent

3.41ct Pink Rose Quartz, Emerald Cut, Transparent

9 x 9 mm (calibrated)

$ 18.68

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1.66ctw Red Pyrope Garnet, Square, VVS-VS

1.66ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 12.73

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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

Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!

Posted By Matthew K. in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I've made several purchases over the last 8 years and I've never been less than happy with any of them.

Posted By Jess in July, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Recomendado Totalmente Los Productos Se Entregaron A Tiempo

Posted By Alexis in May, 2026
Source: Bizrate
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