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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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2.59ctw Green Kornerupine, Pear Shape, VVS-VS

2.59ctw Green Kornerupine, Pear Shape, VVS-VS

6.7 x 4.9 mm

$ 113.50

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2.54ct Orange Moonstone, Cushion, Translucent

2.54ct Orange Moonstone, Cushion, Translucent

9 x 7 mm (calibrated)

$ 5.06

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20.04ct Violet Amethyst, Emerald Cut, VVS-VS

20.04ct Violet Amethyst, Emerald Cut, VVS-VS

18.2 x 14.2 mm

$ 139.72

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0.84ct Yellow Morganite, Pear Shape, VVS

0.84ct Yellow Morganite, Pear Shape, VVS

8 x 5.7 mm

$ 36.81

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0.08ctw Black Diamond, Round, Opaque

0.08ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 63.74

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0.93ct Yellow Beryl, Trillion, VVS

0.93ct Yellow Beryl, Trillion, VVS

7 x 7 mm (calibrated)

$ 18.53

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0.71ct Orange Fire Opal, Oval, Translucent

0.71ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 16.21

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7.98ct Brown Tiger'S Eye, Oval, Opaque

7.98ct Brown Tiger'S Eye, Oval, Opaque

16 x 12 mm (calibrated)

$ 4.69

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4.24ctw Red Pyrope Garnet, Square, VS

4.24ctw Red Pyrope Garnet, Square, VS

4 x 4 mm (calibrated)

$ 32.52

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38.46ct Multicolor Jasper, Oval, Opaque

38.46ct Multicolor Jasper, Oval, Opaque

31.7 x 21.3 mm

$ 21.07

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1.59ct Green Prehnite, Oval, Transparent

1.59ct Green Prehnite, Oval, Transparent

7.5 x 6.3 mm

$ 4.88

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0.78ct Multicolor Opal, Oval, Transparent

0.78ct Multicolor Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 19.42

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12.05ctw Multicolor Pietersite, Pear Shape, Opaque

12.05ctw Multicolor Pietersite, Pear Shape, Opaque

18.9 x 10.8 mm

$ 28.28

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7.42ctw Yellow Citrine, Pear Shape, VVS-VS

7.42ctw Yellow Citrine, Pear Shape, VVS-VS

12 x 10 mm (calibrated)

$ 46.58

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1.40ct Yellow Beryl, Oval, VVS-VS

1.40ct Yellow Beryl, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 26.73

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1.08ct Brown Color-Change Garnet, Oval, VVS-VS

1.08ct Brown Color-Change Garnet, Oval, VVS-VS

6.4 x 5.5 mm

$ 86.29

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6.34ct Brown Smoky Quartz, Pear Shape, VS

6.34ct Brown Smoky Quartz, Pear Shape, VS

15.1 x 11.1 mm

$ 12.63

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2.76ct Turquoise Grandidierite, Pear Shape, Translucent

2.76ct Turquoise Grandidierite, Pear Shape, Translucent

12.1 x 7.4 mm

$ 137.45

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20.39ct Brown Tiger'S Eye, Fancy, Opaque

20.39ct Brown Tiger'S Eye, Fancy, Opaque

31.5 x 8.9 mm

$ 10.16

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2.27ct Green Tourmaline, Emerald Cut, VVS

2.27ct Green Tourmaline, Emerald Cut, VVS

26.3 x 3.3 mm

$ 56.52

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2.55ct Pink Strawberry Quartz, Oval, Transparent

2.55ct Pink Strawberry Quartz, Oval, Transparent

9 x 7 mm (calibrated)

$ 12.70

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18.25ct Violet Amethyst, Cushion, VVS

18.25ct Violet Amethyst, Cushion, VVS

20 x 15 mm (calibrated)

$ 127.24

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1.44ctw Red Pyrope Garnet, Square, VS

1.44ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.05

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5.10ct Orange Sunstone, Oval, Translucent

5.10ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 30.46

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 -> 10 star ratings

Love this website! Looking forward to ordering consistently throughout the years to come building a personal collection.

Posted By Torgo in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'

Posted By CJ in March, 2026
Source: Bizrate

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 -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Ita's a pretty good and simple way to find gems that youa're looking for amazing selection

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