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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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0.73ct Yellow Citrine, Heart, VVS

0.73ct Yellow Citrine, Heart, VVS

6 x 6 mm (calibrated)

$ 5.09

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1.65ct Yellow Citrine, Emerald Cut, VS

1.65ct Yellow Citrine, Emerald Cut, VS

8 x 6 mm (calibrated)

$ 10.31

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19.98ct Green Maw-Sit-Sit, Square, Opaque

19.98ct Green Maw-Sit-Sit, Square, Opaque

15 x 15 mm (calibrated)

$ 65.67

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1.32ct Blue Kyanite, Round, SI

1.32ct Blue Kyanite, Round, SI

6.5 mm (calibrated)

$ 32.87

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4.26ct Red Rhodolite Garnet, Oval, VVS

4.26ct Red Rhodolite Garnet, Oval, VVS

10.6 x 8.3 mm

$ 176.79

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22.70ct Gray Hematite, Heart, Opaque

22.70ct Gray Hematite, Heart, Opaque

20.3 x 19.1 mm

$ 49.74

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5.12ct Yellow Citrine, Oval, VVS

5.12ct Yellow Citrine, Oval, VVS

13.5 x 10 mm

$ 39.26

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0.83ct Purple Spinel, Cushion, VS

0.83ct Purple Spinel, Cushion, VS

5.9 x 5.1 mm

$ 41.02

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1.81ct Red Coral, Oval, Opaque

1.81ct Red Coral, Oval, Opaque

11.6 x 5 mm

$ 297.46

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3.67ctw Yellow Citrine, Oval, VVS-VS

3.67ctw Yellow Citrine, Oval, VVS-VS

9 x 7 mm (calibrated)

$ 28.15

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1.08ct Purple Rhodolite Garnet, Oval, VS

1.08ct Purple Rhodolite Garnet, Oval, VS

7 x 5 mm (calibrated)

$ 28.68

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5.52ct Brown Smoky Quartz, Round, VS

5.52ct Brown Smoky Quartz, Round, VS

12 mm (calibrated)

$ 9.07

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0.70ct Green Tourmaline, Baguette, VVS

0.70ct Green Tourmaline, Baguette, VVS

11.7 x 2.7 mm

$ 24.40

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1.37ct Green Tourmaline, Emerald Cut, VVS-VS

1.37ct Green Tourmaline, Emerald Cut, VVS-VS

17.3 x 3 mm

$ 33.02

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1.96ct Pink Strawberry Quartz, Round, Translucent

1.96ct Pink Strawberry Quartz, Round, Translucent

7 mm (calibrated)

$ 11.99

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0.54ct Yellow Spessartite Garnet, Oval, VS

0.54ct Yellow Spessartite Garnet, Oval, VS

5 x 4 mm (calibrated)

$ 16.14

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18.29ct White Rainbow Moonstone, Fancy, Transparent

18.29ct White Rainbow Moonstone, Fancy, Transparent

21.2 x 13.9 mm

$ 145.73

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5.57ct Multicolor Labradorite, Round, Translucent

5.57ct Multicolor Labradorite, Round, Translucent

11 mm (calibrated)

$ 13.54

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4.49ct Yellow Citrine, Oval, VVS-VS

4.49ct Yellow Citrine, Oval, VVS-VS

12 x 10 mm (calibrated)

$ 34.43

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12.38ct Multicolor Boulder Opal, Fancy, Translucent

12.38ct Multicolor Boulder Opal, Fancy, Translucent

25 x 18 mm (calibrated)

$ 61.65

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3.59ct Yellow Citrine, Oval, VVS

3.59ct Yellow Citrine, Oval, VVS

11 x 9 mm (calibrated)

$ 21.95

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1.75ct Orange Hessonite Garnet, Oval, VVS-VS

1.75ct Orange Hessonite Garnet, Oval, VVS-VS

8 x 6.6 mm

$ 31.96

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0.58ct Purple Spinel, Round, VVS-VS

0.58ct Purple Spinel, Round, VVS-VS

5 mm (calibrated)

$ 30.42

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58.14ct Violet Amethyst, Oval, VVS
Amethyst Product Video (753779)

58.14ct Violet Amethyst, Oval, VVS

30 x 22 mm (calibrated)

$ 482.56

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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

The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.

Posted By Maharishi in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose 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 -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I do enjoy this website and the wide selection. I would like to see more untreated stones. I also wasn't able to see my past order when I logged in.

Posted By Great selection, ok website in July, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

Posted By JC in March, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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