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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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19.65ctw Black Spinel, Oval, Opaque

19.65ctw Black Spinel, Oval, Opaque

16 x 12 mm (calibrated)

$ 64.59

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2.30ct Yellow Citrine, Flower Cut, Transparent

2.30ct Yellow Citrine, Flower Cut, Transparent

8.6 x 8.4 mm

$ 17.64

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6.21ct Brown Smoky Quartz, Pear Shape, VVS

6.21ct Brown Smoky Quartz, Pear Shape, VVS

15 x 10.9 mm

$ 12.37

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4.27ct Yellow Citrine, Emerald Cut, VVS-VS

4.27ct Yellow Citrine, Emerald Cut, VVS-VS

11 x 9 mm (calibrated)

$ 29.77

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13.95ct Brown Tiger'S Eye, Oval, Opaque

13.95ct Brown Tiger'S Eye, Oval, Opaque

20 x 15 mm (calibrated)

$ 15.29

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1.55ct Orange Hessonite Garnet, Oval, VS

1.55ct Orange Hessonite Garnet, Oval, VS

8 x 6 mm (calibrated)

$ 27.79

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0.74ct Pink Tourmaline, Oval, Transparent

0.74ct Pink Tourmaline, Oval, Transparent

6.2 x 5 mm

$ 12.26

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4.66ct Purple Rhodolite Garnet, Oval, VVS-VS

4.66ct Purple Rhodolite Garnet, Oval, VVS-VS

10.4 x 9.1 mm

$ 193.39

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0.88ct Green Tourmaline, Emerald Cut, VS

0.88ct Green Tourmaline, Emerald Cut, VS

14 x 2.8 mm

$ 24.10

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28.05ctw Multicolor Cinnabar, Cushion, Opaque

28.05ctw Multicolor Cinnabar, Cushion, Opaque

20 x 20 mm (calibrated)

$ 32.83

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2.43ct Pink Strawberry Quartz, Oval, Transparent

2.43ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 18.06

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2.73ct Brown Smoky Quartz, Oval, VVS

2.73ct Brown Smoky Quartz, Oval, VVS

14.1 x 7.1 mm

$ 19.03

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2.68ctw Orange Zircon, Emerald Cut, VVS-VS

2.68ctw Orange Zircon, Emerald Cut, VVS-VS

7 x 5 mm (calibrated)

$ 44.04

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0.25ct Black Diamond, Square, Opaque

0.25ct Black Diamond, Square, Opaque

3 x 2.8 mm

$ 124.50

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2.83ct Multicolor Fire Agate, Oval, Translucent

2.83ct Multicolor Fire Agate, Oval, Translucent

11 x 9 mm (calibrated)

$ 20.16

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2.52ctw Red Pyrope Garnet, Square, VS

2.52ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 19.32

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4.10ct Multicolor Fire Agate, Fancy, Translucent

4.10ct Multicolor Fire Agate, Fancy, Translucent

10.9 x 8.3 mm

$ 29.20

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1.32ct Orange Hessonite Garnet, Baguette, SI

1.32ct Orange Hessonite Garnet, Baguette, SI

7 x 5 mm (calibrated)

$ 28.93

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3.03ct Multicolor Labradorite, Baguette, Translucent

3.03ct Multicolor Labradorite, Baguette, Translucent

9 x 7 mm (calibrated)

$ 4.17

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9.33ctw Violet Amethyst, Round, Transparent

9.33ctw Violet Amethyst, Round, Transparent

8.5 mm (calibrated)

$ 51.11

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1.33ct Purple Spinel, Cushion, VVS-VS

1.33ct Purple Spinel, Cushion, VVS-VS

7.6 x 4.9 mm

$ 111.54

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36.78ct Green Amazonite, Oval, Opaque

36.78ct Green Amazonite, Oval, Opaque

34.6 x 19 mm

$ 29.30

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1.33ctw Blue Kyanite, Round, SI

1.33ctw Blue Kyanite, Round, SI

5.2 mm

$ 33.12

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0.94ct Yellow Sphalerite, Oval, SI

0.94ct Yellow Sphalerite, Oval, SI

5.7 x 4.7 mm

$ 46.81

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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 always purchase my stones from GemSelect, their products are high quality and customer service is always great. I also like the fact that I am able to purchase unique items

Posted By Desperaux in November, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.

Posted By Atsu in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Everything was good, the purchase was what I expected and what they show is what you get.

Posted By Mr. in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the products. I've bought them as gifts and people love my gifts

Posted By Love it! in February, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I have a beautiful emerald I purchased from a company names gemselect and they are awesome! You should try them out?

Posted By Lynn in September, 2025
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
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