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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
Single
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6.21ct Green Actinolite Cat'S Eye, Oval, Translucent

6.21ct Green Actinolite Cat'S Eye, Oval, Translucent

14.1 x 11.3 mm

$ 43.29

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4.27ctw Orange Hessonite Garnet, Oval, VS-SI

4.27ctw Orange Hessonite Garnet, Oval, VS-SI

8.5 x 6.9 mm

$ 71.21

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39.54ct Multicolor Jasper, Pear Shape, Opaque

39.54ct Multicolor Jasper, Pear Shape, Opaque

31.3 x 31.5 mm

$ 24.25

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0.30ct Violet Amethyst, Emerald Cut, VS

0.30ct Violet Amethyst, Emerald Cut, VS

5.1 x 3.2 mm

$ 1.74

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4.56ctw Yellow Citrine, Oval, VVS

4.56ctw Yellow Citrine, Oval, VVS

10 x 8 mm (calibrated)

$ 24.98

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0.38ct Blue Kyanite, Round, VS-SI

0.38ct Blue Kyanite, Round, VS-SI

3.8 mm

$ 6.81

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1.70ct Violet Amethyst, Marquise, VS-SI

1.70ct Violet Amethyst, Marquise, VS-SI

12.1 x 6 mm

$ 13.04

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0.22ct Green Tsavorite Garnet, Oval, VVS

0.22ct Green Tsavorite Garnet, Oval, VVS

4.8 x 2.8 mm

$ 10.96

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4.42ct Orange Sunstone, Oval, Translucent

4.42ct Orange Sunstone, Oval, Translucent

12 x 10 mm (calibrated)

$ 26.29

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1.00ct Pink Tourmaline, Round, Transparent

1.00ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 16.58

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3.08ct Violet Amethyst, Trillion, VS

3.08ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 24.54

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1.78ct Orange Hessonite Garnet, Emerald Cut, VS-SI

1.78ct Orange Hessonite Garnet, Emerald Cut, VS-SI

6 x 6 mm (calibrated)

$ 35.10

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1.33ct Yellow Beryl, Oval, VVS

1.33ct Yellow Beryl, Oval, VVS

9 x 7 mm (calibrated)

$ 26.49

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0.61ct Pink Spinel, Heart, VS

0.61ct Pink Spinel, Heart, VS

5.8 x 5.3 mm

$ 73.20

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1.81ct Green Sphene, Oval, Transparent

1.81ct Green Sphene, Oval, Transparent

7.4 x 6 mm

$ 9.01

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5.43ct Brown Cat'S Eye Scapolite, Oval, Translucent

5.43ct Brown Cat'S Eye Scapolite, Oval, Translucent

10.9 x 9.7 mm

$ 29.75

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1.27ct Red Tourmaline, Oval, Transparent

1.27ct Red Tourmaline, Oval, Transparent

8 x 6 mm (calibrated)

$ 21.77

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0.07ct Black Diamond, Square, Opaque
Diamond Product Video (678018)

0.07ct Black Diamond, Square, Opaque

2 x 2 mm (calibrated)

$ 34.86

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2.53ct Orange Hessonite Garnet, Cushion, VVS-VS

2.53ct Orange Hessonite Garnet, Cushion, VVS-VS

8.7 x 6.7 mm

$ 45.36

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0.60ct Yellow Color-Change Diaspore, Square, VS-SI

0.60ct Yellow Color-Change Diaspore, Square, VS-SI

4.6 x 4.5 mm

$ 21.51

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2.75ctw Red Pyrope Garnet, Square, VS

2.75ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 21.10

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11.99ct Green Serpentine, Oval, Translucent

11.99ct Green Serpentine, Oval, Translucent

20.1 x 12.8 mm

$ 25.68

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5.10ct Green Actinolite Cat'S Eye, Oval, Translucent

5.10ct Green Actinolite Cat'S Eye, Oval, Translucent

13.1 x 10.6 mm

$ 35.56

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1.47ctw Red Pyrope Garnet, Square, VS

1.47ctw Red Pyrope Garnet, Square, VS

5 x 5 mm (calibrated)

$ 11.27

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

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
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 -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate

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 -> 10 star ratings

Web site is very simple to navigate Selection is terrific

Posted By ToRa.62 in April, 2026
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
→ View All GemSelect Reviews on Bizrate
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