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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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1.57ctw Green Peridot, Oval, VS

1.57ctw Green Peridot, Oval, VS

7 x 5 mm (calibrated)

$ 21.90

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66.10ct White Dendritic Agate, Pear Shape, Opaque

66.10ct White Dendritic Agate, Pear Shape, Opaque

47.4 x 31.3 mm

$ 32.92

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0.40ct Green Kornerupine, Baguette, VS

0.40ct Green Kornerupine, Baguette, VS

5.9 x 3.3 mm

$ 21.91

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11.86ctw Violet Amethyst, Cushion, VVS

11.86ctw Violet Amethyst, Cushion, VVS

15.1 x 9.1 mm

$ 82.68

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5.72ctw Violet Amethyst, Trillion, VS

5.72ctw Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 45.58

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2.87ct Green Tourmaline, Emerald Cut, VVS-VS

2.87ct Green Tourmaline, Emerald Cut, VVS-VS

18.5 x 4.3 mm

$ 78.62

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1.35ct Pink Tourmaline, Oval, VS

1.35ct Pink Tourmaline, Oval, VS

6.7 x 6.1 mm

$ 207.07

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1.69ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.69ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 33.32

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5.50ct Yellow Apatite, Oval, VS-SI

5.50ct Yellow Apatite, Oval, VS-SI

13 x 10.5 mm

$ 152.02

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7.67ct Multicolor Agate, Oval, Opaque

7.67ct Multicolor Agate, Oval, Opaque

12.5 x 10.5 mm

$ 7.64

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50.45ctw Multicolor Tourmaline, Flower Cut, Transparent
Tourmaline Product Video (690537)

50.45ctw Multicolor Tourmaline, Flower Cut, Transparent

27.7 x 21.8 mm

$ 983.36

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1.80ctw Red Pyrope Garnet, Heart, VVS-VS

1.80ctw Red Pyrope Garnet, Heart, VVS-VS

6 x 6 mm (calibrated)

$ 13.80

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2.22ct Green Prehnite, Oval, Transparent/Translucent

2.22ct Green Prehnite, Oval, Transparent/Translucent

8.8 x 6.7 mm

$ 6.57

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1.57ctw Red Pyrope Garnet, Square, VS

1.57ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 12.04

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1.87ct Orange Hessonite Garnet, Cushion, VS

1.87ct Orange Hessonite Garnet, Cushion, VS

7 x 7 mm (calibrated)

$ 27.85

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1.06ct Orange Moonstone, Pear Shape, Translucent

1.06ct Orange Moonstone, Pear Shape, Translucent

9 x 6 mm (calibrated)

$ 2.12

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2.07ct Blue Kyanite, Oval, SI

2.07ct Blue Kyanite, Oval, SI

8 x 6 mm (calibrated)

$ 43.09

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21.00ct Multicolor Quartz With Marcasite, Oval, Transparent

21.00ct Multicolor Quartz With Marcasite, Oval, Transparent

22.8 x 16.2 mm

$ 138.05

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0.66ct Green Tourmaline, Cushion, VVS-VS

0.66ct Green Tourmaline, Cushion, VVS-VS

5.3 x 5 mm

$ 32.87

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1.13ctw Multicolor Opal, Oval, Transparent

1.13ctw Multicolor Opal, Oval, Transparent

6 x 4 mm (calibrated)

$ 38.86

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6.07ct White Topaz, Cushion, VS

6.07ct White Topaz, Cushion, VS

12 x 10 mm (calibrated)

$ 40.30

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9.15ct Brown Tiger'S Eye, Oval, Opaque

9.15ct Brown Tiger'S Eye, Oval, Opaque

18 x 13 mm (calibrated)

$ 9.11

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0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

0.74ct Yellow Color-Change Diaspore, Emerald Cut, VS

7.2 x 4.1 mm

$ 39.06

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5.65ctw Multicolor Labradorite, Baguette, Translucent

5.65ctw Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 7.77

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

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great prices!!! High quality gemstones.

Posted By Ricky in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
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 -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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