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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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4.47ct Yellow Citrine, Oval, VVS-VS

4.47ct Yellow Citrine, Oval, VVS-VS

14 x 10 mm (calibrated)

$ 26.84

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4.26ct Pink Rose Quartz, Square, Transparent

4.26ct Pink Rose Quartz, Square, Transparent

9.5 x 9.5 mm

$ 21.21

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6.73ctw White Moonstone, Round, Translucent

6.73ctw White Moonstone, Round, Translucent

9 mm (calibrated)

$ 18.43

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9.66ct Green Cat'S Eye Opal, Oval, Opaque

9.66ct Green Cat'S Eye Opal, Oval, Opaque

18.1 x 9.8 mm

$ 26.76

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1.81ctw Green Demantoid Garnet, Oval, VS
Demantoid Garnet Product Video (458256)

1.81ctw Green Demantoid Garnet, Oval, VS

4.3 x 3.5 mm

$ 198.30

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0.78ct Green Tourmaline, Emerald Cut, VS

0.78ct Green Tourmaline, Emerald Cut, VS

7 x 4.1 mm

$ 19.42

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1.58ct Green Tourmaline, Emerald Cut, VS

1.58ct Green Tourmaline, Emerald Cut, VS

16.3 x 3.4 mm

$ 43.28

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1.14ct Multicolor Pietersite, Round, Opaque

1.14ct Multicolor Pietersite, Round, Opaque

5.7 mm

$ 2.76

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4.72ctw Pink Rose Quartz, Emerald Cut, Transparent

4.72ctw Pink Rose Quartz, Emerald Cut, Transparent

8.5 x 8.5 mm

$ 25.85

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1.68ct Pink Morganite, Oval, VS

1.68ct Pink Morganite, Oval, VS

8.9 x 6.6 mm

$ 128.84

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5.63ctw Violet Amethyst, Trillion, VS

5.63ctw Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 39.25

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1.34ct Gray Sillimanite Cat'S Eye, Oval, Transparent

1.34ct Gray Sillimanite Cat'S Eye, Oval, Transparent

7.8 x 5.5 mm

$ 4.40

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31.68ct Green Bloodstone, Pear Shape, Opaque

31.68ct Green Bloodstone, Pear Shape, Opaque

33 x 21.8 mm

$ 14.20

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1.03ctw White Rainbow Moonstone, Oval, Transparent

1.03ctw White Rainbow Moonstone, Oval, Transparent

6 x 4 mm (calibrated)

$ 32.83

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2.30ct Multicolor Labradorite, Marquise, Translucent

2.30ct Multicolor Labradorite, Marquise, Translucent

12.3 x 6.3 mm

$ 5.09

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21.49ct Violet Amethyst, Pear Shape, VVS

21.49ct Violet Amethyst, Pear Shape, VVS

21.3 x 16.6 mm

$ 164.80

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24.23ct Gray Hematite, Square, Opaque

24.23ct Gray Hematite, Square, Opaque

17 x 15.9 mm

$ 23.62

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1.10ct Multicolor Opal, Pear Shape, Translucent

1.10ct Multicolor Opal, Pear Shape, Translucent

10 x 7 mm (calibrated)

$ 27.39

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1.07ct Blue Kyanite, Oval, SI

1.07ct Blue Kyanite, Oval, SI

7 x 5 mm (calibrated)

$ 26.64

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1.92ctw Pink Strawberry Quartz, Round, Transparent

1.92ctw Pink Strawberry Quartz, Round, Transparent

6.5 mm (calibrated)

$ 29.45

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2.54ct Orange Hessonite Garnet, Emerald Cut, VS-SI

2.54ct Orange Hessonite Garnet, Emerald Cut, VS-SI

8 x 6 mm (calibrated)

$ 41.92

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11.91ct Violet Amethyst, Flower Cut, Translucent

11.91ct Violet Amethyst, Flower Cut, Translucent

15 x 15 mm (calibrated)

$ 39.14

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0.97ct Yellow Color-Change Diaspore, Square, VVS-VS

0.97ct Yellow Color-Change Diaspore, Square, VVS-VS

5.6 x 5.4 mm

$ 40.08

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0.81ct Orange Sphalerite, Round, SI

0.81ct Orange Sphalerite, Round, SI

5 mm (calibrated)

$ 40.34

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

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 7 star ratings

Overall the site is good to use and simple to navigate for what i needed and i liked that they are clear and detailed on the size shape and cut of the stones only input id like is for stones that have a specific refractive quality like moonstone in my case if theyd showcase the cut stones refraction so you know how it looks when buying

Posted By Revenant in August, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.

Posted By Big Ricky in May, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

It was fine . Wish there had been more round stones to select from

Posted By Emm in January, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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